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General Chemistry MCQ

1. What is a chemical property?

A material's response to changes in temperature

A material's response to changes in pressure

A physical property that cannot be observed without changing the chemical composition of the sample

A characteristic of a material involving its chemical change

Answer

Correct Answer: A characteristic of a material involving its chemical change

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2. What is chemical nomenclature?

A branch of chemistry

The systematic naming of chemical compounds

The study of chemicals

The study of the properties of matter

Answer

Correct Answer: The systematic naming of chemical compounds

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3. What is chemical kinetics?

The study of the properties of molecules

The study of the behavior of molecules

The study of how reaction rates change under varying conditions.

A branch of chemistry that deals with the study of matter

Answer

Correct Answer: The study of how reaction rates change under varying conditions.

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4. What does a chemical formula convey?

The density of a substance

The relative proportions of atoms of the different elements in a substance

The physical properties of a substance

The boiling point of a substance

Answer

Correct Answer: The relative proportions of atoms of the different elements in a substance

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5. What is chemical equilibrium?

The state reached by a reaction mixture when the rates of forward and reverse reactions are unequal.

The state reached by a reaction mixture when the rates of forward and reverse reactions have become equal.

Answer

Correct Answer: The state reached by a reaction mixture when the rates of forward and reverse reactions have become equal.

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6. What is a chemical equation?

A physical representation of a chemical reaction

The energy released in a chemical reaction

The study of chemical reactions

The symbolic representation of a chemical reaction in terms of chemical formulas

Answer

Correct Answer: The symbolic representation of a chemical reaction in terms of chemical formulas

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7. What is a chemical bond?

A unit of measurement in the metric system

A physical state of matter

The process of breaking a chemical bond

A strong attractive force that exists between certain atoms in a substance

Answer

Correct Answer: A strong attractive force that exists between certain atoms in a substance

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8. What is Chelate?

A compound with two or more double bonds

A complex formed by polydentate ligands

A covalent compound with two metal atoms

A complex formed by monodentate ligands

Answer

Correct Answer: A complex formed by polydentate ligands

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9. Which of the following is not directly proportional to the absolute temperature?

The molar volume of a given ideal gas

The volume occupied by any sample of gas at a constant pressure

The density of a given mass of gas

The pressure of a given mass of gas

Answer

Correct Answer: The volume occupied by any sample of gas at a constant pressure

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10. What is Charles's law?

The volume occupied by any sample of gas at a constant temperature is directly proportional to the absolute pressure.

The volume occupied by any sample of gas at a constant pressure is directly proportional to the absolute temperature.

The volume occupied by any sample of gas at a constant temperature is inversely proportional to the absolute pressure.

Answer

Correct Answer: The volume occupied by any sample of gas at a constant pressure is directly proportional to the absolute temperature.

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11. What is a change of state?

A change of a substance from one form to another.

A change of a substance from one state to another.

A change of a substance from one shape to another.

A change of a substance from one color to another.

Answer

Correct Answer: A change of a substance from one state to another.

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12. What is a nuclear chain reaction?

A nuclear fission that causes the release of energy in an uncontrolled manner

A self-sustaining series of nuclear fissions caused by the absorption of neutrons released from previous nuclear fissions.

A process that results in the release of energy from the nucleus of an atom

Answer

Correct Answer: A self-sustaining series of nuclear fissions caused by the absorption of neutrons released from previous nuclear fissions.

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13. What is a chain reaction?

A reaction that occurs when two or more atoms collide to form new, more complex atoms.

A self-sustaining series of nuclear fissions caused by the absorption of neutrons released from previous nuclear fissions

A reaction that involves the breaking of chemical bonds.

A reaction that occurs when energy is added to a system

Answer

Correct Answer: A self-sustaining series of nuclear fissions caused by the absorption of neutrons released from previous nuclear fissions

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14. How many units are in the Celsius temperature scale?

100

120

110

Answer

Correct Answer: 100

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15. What is the normal boiling point of water on the Celsius scale?

32 units

100 units

212 units

68 units

Answer

Correct Answer: 100 units

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16. What is a cell reaction?

The process of a cell releasing energy

The process of a cell using energy

The net reaction that occurs in a voltaic cell.

The process of a cell breaking down

Answer

Correct Answer: The net reaction that occurs in a voltaic cell.

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17. What is the cell potential?

The potential difference between the cathode and the anode of a voltaic cell

The minimum potential difference between the electrodes of a voltaic cell

The maximum potential difference between the electrodes of a voltaic cell

The potential difference between the electrolyte and the electrodes of a voltaic cell

Answer

Correct Answer: The maximum potential difference between the electrodes of a voltaic cell

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18. What is the maximum potential difference between the electrodes of a voltaic cell called?

Potential difference

Electrical potential

Cell potential

Battery potential

Answer

Correct Answer: Cell potential

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19. What does a cation exchange resin do?

Absorbs water from the air

Removes cations from solution and replaces them with hydrogen ions

Decreases the pH of a solution

Removes anions from solution and replaces them with sodium ions

Answer

Correct Answer: Removes cations from solution and replaces them with hydrogen ions

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20. What is a cation?

A proton

An ion with a negative charge

A neutron

A positively charged ion

Answer

Correct Answer: A positively charged ion

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21. What are cathode rays?

A type of x-rays

The rays that are absorbed by the anode in a gas discharge tube

The rays emitted by the cathode in a gas discharge tube

A type of radioactive rays

Answer

Correct Answer: The rays emitted by the cathode in a gas discharge tube

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22. What is the definition of "cathode"?

The study of cathodes

A device used to produce cathode rays

The electrode at which oxidation occurs

The electrode at which reduction occurs

Answer

Correct Answer: The electrode at which reduction occurs

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23. What is the electrode at which reduction occurs?

Anode

Cathode

Electrode

Reduction

Answer

Correct Answer: Cathode

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24. What is catenation?

The covalent bonding of two or more atoms of different elements to one another

The ionic bonding of two or more atoms of the same element to one another

The ionic bonding of two or more atoms of different elements to one another

The covalent bonding of two or more atoms of the same element to one another

Answer

Correct Answer: The covalent bonding of two or more atoms of the same element to one another

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25. What is a catalyst?

A substance that increases the rate of reaction without being consumed in the overall reaction.

A substance that is necessary for the reaction to occur.

A substance that is consumed in the overall reaction.

A substance that decreases the rate of reaction.

Answer

Correct Answer: A substance that increases the rate of reaction without being consumed in the overall reaction.

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26. What is catalysis?

The study of cats

The decrease in rate of a reaction as the result of the addition of a catalyst

The increase in rate of a reaction as the result of the addition of a catalyst

A reaction that occurs in the presence of a catalyst

Answer

Correct Answer: The increase in rate of a reaction as the result of the addition of a catalyst

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27. What is the carboxyl group?

? COOH

COO-

HOCOO-

Answer

Correct Answer: ? COOH

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28. What is the IUPAC name of carboxylic acid?

Ester

Acid chloride

Acid anhydride

Carboxylic acid

Answer

Correct Answer: Carboxylic acid

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29. What is a calorimeter?

A device used to measure the volume.

A device used to measure the temperature.

A device used to measure the mass.

A device used to measure the heat absorbed or evolved during a physical or chemical change.

Answer

Correct Answer: A device used to measure the heat absorbed or evolved during a physical or chemical change.

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30. What is the unit of energy in Calorie?

Joule

Meter

Candela

Kilogram

Answer

Correct Answer: Joule

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31. How many joules are in 1 calorie?

1.000

3.204

2.718

4.184

Answer

Correct Answer: 4.184

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32. What is a black light?

A lamp that emits blue light.

A lamp that emits ultraviolet radiation.

A lamp that emits infrared radiation.

A lamp that emits green light.

Answer

Correct Answer: A lamp that emits ultraviolet radiation.

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33. What does a black light emit?

Microwaves

Infrared radiation

Visible light

Ultraviolet radiation

Answer

Correct Answer: Ultraviolet radiation

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34. What is the name for the element with atomic number 83?

Methane

Nitrogen

Aluminum

Bismuth

Answer

Correct Answer: Bismuth

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35. What is the chemistry of living things called?

Biology

Biochemistry

Chemistry

Physics

Answer

Correct Answer: Biochemistry

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36. What is the binding energy needed for?

To remove an electron from an atom or separate a proton or neutron from the atomic nucleus.

To add an electron to an atom

To create an atom

To break an atom apart

Answer

Correct Answer: To remove an electron from an atom or separate a proton or neutron from the atomic nucleus.

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37. What is the binding energy needed to remove an electron from an atom?

To separate a proton from a neutron

To remove a proton from an atom

To remove an electron from an atom

To remove a neutron from an atom

Answer

Correct Answer: To remove an electron from an atom

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38. What is a binary acid?

An acid made up of two hydrogen atoms

An acidic binary compound in which one element is hydrogen and the other element is another nonmetal.

An acid made up of two elements

A base made up of two elements

Answer

Correct Answer: An acidic binary compound in which one element is hydrogen and the other element is another nonmetal.

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39. What is beta radiation?

A solid form of radiation

A liquid form of radiation

Ionizing radiation from beta decay in the form of an energetic electron or positron.

A gaseous form of radiation

Answer

Correct Answer: Ionizing radiation from beta decay in the form of an energetic electron or positron.

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40. What is a beta particle?

A subatomic particle with a mass slightly less than that of an atom

A radioactive isotope

An electron or positron emitted during beta decay

The pair production of an electron and a positron

Answer

Correct Answer: An electron or positron emitted during beta decay

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41. What is beta decay?

Type of radioactive decay that results in spontaneous emission of a beta particle.

Spontaneous emission of a alpha particle

Alpha decay

Gamma decay

Answer

Correct Answer: Type of radioactive decay that results in spontaneous emission of a beta particle.

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42. What is the element symbol for beryllium?

Answer

Correct Answer: Be

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43. What is the atomic number of beryllium?

Answer

Correct Answer: 4

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44. What is the element symbol for berkelium?

Answer

Correct Answer: Bk

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45. What is the name of the law that states the concentration of a solution is directly proportional to its light absorbance?

Newton's Law of Gravity

Beer's Law (Beer-Lambert Law)

Avogadro's Law

Boyle's Law

Answer

Correct Answer: Beer's Law (Beer-Lambert Law)

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46. What is the Beer-Lambert law?

The concentration of a solution is directly proportional to its light absorbance.

The absorbance of light is directly proportional to the concentration of a solution.

The absorbance of light is inversely proportional to the concentration of a solution.

The concentration of a solution is inversely proportional to its light absorbance.

Answer

Correct Answer: The concentration of a solution is directly proportional to its light absorbance.

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47. Which type of solution has a pH greater than 7?

Basic solution

Neutral solution

Acidic solution

Aqueous solution

Answer

Correct Answer: Basic solution

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48. What does "basic" mean in the context of pH?

Being acidic

Being neutral

Having a pH > 7

Having a pH < 7

Answer

Correct Answer: Having a pH > 7

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49. What is the definition of "basic"?

Acidic or having a pH < 7.

Neutral or having a pH = 7.

Ionized or having a pH > 14.

Alkaline or having a pH > 7.

Answer

Correct Answer: Alkaline or having a pH > 7.

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50. Which of the following is not a base metal?

Iron

Noble metal

Tin

Copper

Answer

Correct Answer: Noble metal

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51. What is a base anhydride?

A basic solution

An acid anhydride

A metal oxide

A metal oxide formed from the reaction between water and a basic solution

Answer

Correct Answer: A metal oxide formed from the reaction between water and a basic solution

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52. What is the definition of "base"?

A chemical species that either donates protos or else accepts electrons or hydroxide ions.

A chemical species that either donates protons or else accepts electrons or hydroxide ions.

A chemical species that either accepts protons or else donates electrons or hydroxide ions.

A chemical species that either accepts protons or else donates electrons or oxide ions.

Answer

Correct Answer: A chemical species that either accepts protons or else donates electrons or hydroxide ions.

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53. What is a barometer used for?

Measuring atmospheric pressure

Measuring time

Measuring temperature

Measuring distance

Answer

Correct Answer: Measuring atmospheric pressure

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54. What is the element symbol for Barium?

Answer

Correct Answer: Ba

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55. There are ____ lines in the visible spectrum

Three

Two

Four

One

Answer

Correct Answer: Four

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56. A balanced equation must have the same number of ____ on both sides.

Compounds

Atoms

Elements

Mixtures

Answer

Correct Answer: Atoms

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57. What is the analyte concentration determined by back titration?

The light emitted

Reacting it with a known quantity of excess reagent.

The change in color

The heat of the solution

Answer

Correct Answer: Reacting it with a known quantity of excess reagent.

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58. What is the meaning of "back titration"?

A method used to find the original volume of a solution

The process of reverse titration

A way to increase the accuracy of titration results

Titration in which the analyte concentration is determined by reacting it with a known quantity of excess reagent.

Answer

Correct Answer: Titration in which the analyte concentration is determined by reacting it with a known quantity of excess reagent.

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59. What is background radiation?

The result of incomplete combustion of hydrocarbons

A measure of the amount of oxygen in air

Radiation from external sources, typically from cosmic radiation and radioisotope decay.

The result of radioactivity

Answer

Correct Answer: Radiation from external sources, typically from cosmic radiation and radioisotope decay.

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60. The Aufbau principle is a scheme used to reproduce what?

Atomic radii

Atomic masses

Electron configurations of the ground states of atoms

Electron configurations of excited states of atoms

Answer

Correct Answer: Electron configurations of the ground states of atoms

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61. The building-up principle is a scheme used to reproduce what?

The proton configurations of the ground states of atoms

The electron configurations of the ground states of atoms

The electron configurations of the excited states of atoms

The proton configurations of the excited states of atoms

Answer

Correct Answer: The electron configurations of the ground states of atoms

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62. When limited amounts of acid or base are added to a solution, it is said to be ________________.

Unsaturated

Buffer

Supersaturated

Saturated

Answer

Correct Answer: Buffer

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63. What is buckminsterfullerene?

A soccer ball-shaped molecule

A mineral

A molecular form of carbon (C60)

A type of carbon

Answer

Correct Answer: A molecular form of carbon (C60)

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64. What is the name given to the soccer-ball shaped molecule Buckminsterfullerene?

"Carbon"

"Buckyball"

"Fullerene"

"Molecule"

Answer

Correct Answer: "Buckyball"

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65. What is a base in the Brønsted-Lowry concept?

A molecule with a pKa greater than 7

The species transferring a proton in a proton-transfer reaction

A molecule with a pKa less than 7

The species accepting a proton in a proton-transfer reaction

Answer

Correct Answer: The species accepting a proton in a proton-transfer reaction

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66. What is a base according to the Brønsted-Lowry concept?

A Lewis base

The species donating a proton in a proton-transfer reaction

A Lewis acid

The species accepting a proton in a proton-transfer reaction

Answer

Correct Answer: The species accepting a proton in a proton-transfer reaction

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67. Which of the following is not true about Boyle's law?

The relationship between the absolute temperature and volume of a given amount of an ideal gas is directly proportional.

The volume of a sample of gas at a given temperature varies inversely with the applied pressure

Answer

Correct Answer: The volume of a sample of gas at a given temperature varies inversely with the applied pressure

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68. What is Boyle's law?

The volume of a sample of gas at a given temperature varies inversely with the applied pressure.

The pressure of a sample of gas at a given temperature varies inversely with the applied volume.

The volume of a sample of gas at a given pressure varies inversely with the applied temperature.

The pressure of a sample of gas at a given volume varies inversely with the applied temperature.

Answer

Correct Answer: The volume of a sample of gas at a given temperature varies inversely with the applied pressure.

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69. What is a bonding pair?

Atoms of different elements bonded together

An electron pair shared between two atoms

A molecule composed of two atoms of the same element bonded together

Two atoms held together by weak forces

Answer

Correct Answer: An electron pair shared between two atoms

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70. What are bonding orbitals?

Atomic orbitals

Energy levels of an atom

Molecular orbitals that are concentrated in the regions between nuclei

The paths of electrons in an atom

Answer

Correct Answer: Molecular orbitals that are concentrated in the regions between nuclei

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71. What is the bond order in molecular orbital theory?

Zero

One-half the difference between the number of bonding electrons and the number of antibonding electrons

The number of bonding electrons

The number of antibonding electrons

Answer

Correct Answer: One-half the difference between the number of bonding electrons and the number of antibonding electrons

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72. What is the bond order in a Lewis formula?

The number of pairs of electrons in a bond

The number of protons in a bond

The number of neutrons in a bond

The number of electrons in a bond

Answer

Correct Answer: The number of pairs of electrons in a bond

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73. What is the bond length between two atoms?

The size of the atom.

The distance between the nuclei in a bond.

The energy needed to break a bond.

The strength of the attraction between two atoms.

Answer

Correct Answer: The distance between the nuclei in a bond.

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74. What is the bond length?

The force that hold atoms together in a molecule

The attraction between the nuclei and electrons in a bond

The distance between the nuclei in a bond

The electrons in a bond

Answer

Correct Answer: The distance between the nuclei in a bond

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75. What is the average enthalpy change for the breaking of a bond in a molecule in the gas phase?

Energy

Gas phase enthalpy

Bond energy

Average enthalpy

Answer

Correct Answer: Bond energy

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76. What is Bond Energy?

The average energy needed to break a bond in a molecule in the gas phase

The average energy needed to form a bond in a molecule in the gas phase

The average enthalpy change for the breaking of a bond in a molecule in the gas phase

The average enthalpy change for the forming of a bond in a molecule in the gas phase

Answer

Correct Answer: The average enthalpy change for the breaking of a bond in a molecule in the gas phase

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77. What is the boiling point of a solution equal to?

The boiling point of the pure solvent

The freezing point of the solution

The freezing point of the pure solvent

The boiling point of the solution minus the boiling point of the pure solvent

Answer

Correct Answer: The boiling point of the solution minus the boiling point of the pure solvent

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78. What is the boiling point?

The temperature at which the vapor pressure of a liquid equals the atmospheric pressure

The temperature at which a liquid changes to a gas

The melting point of a solid

The freezing point of a liquid

Answer

Correct Answer: The temperature at which the vapor pressure of a liquid equals the atmospheric pressure

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79. What is Binding energy?

The energy needed to break a neutron into its individual quarks

The energy needed to break a nucleus into its individual electrons and protons

The energy needed to break a proton into its individual quarks

The energy needed to break a nucleus into its individual protons and neutrons

Answer

Correct Answer: The energy needed to break a nucleus into its individual protons and neutrons

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80. What is binary hydride?

A compound that contains hydrogen and two other elements

A compound that contains hydrogen and one other element

A compound that contains only hydrogen and one other element

A compound that contains hydrogen and three other elements

Answer

Correct Answer: A compound that contains hydrogen and one other element

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81. What is a binary compound?

A mixture of two or more compounds

A compound composed of two or more elements

A compound composed of only two elements

A compound composed of three or more elements

Answer

Correct Answer: A compound composed of only two elements

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82. What is a bimolecular reaction?

A reaction that occurs between two surfaces

A reaction that proceeds in a single step

A reaction that involves three reactant molecules

An elementary reaction that involves two reactant molecules

Answer

Correct Answer: An elementary reaction that involves two reactant molecules

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83. What is a bidentate ligand?

A ligand that only bonds to one metal atom

A ligand that bonds to a metal atom through two atoms of the ligand

A ligand with two possible bonding sites

A ligand that is difficult to remove

Answer

Correct Answer: A ligand that bonds to a metal atom through two atoms of the ligand

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84. What is Beta emission?

A high-speed electron colliding with a nucleus

Spontaneous fission of a uranium nucleus

Emission of a high-speed electron from an unstable nucleus

The W and Z bosons decaying into electrons and positrons

Answer

Correct Answer: Emission of a high-speed electron from an unstable nucleus

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85. What is bent geometry?

Angular geometry

Non-Euclidean geometry

Projective geometry

Linear geometry

Answer

Correct Answer: Angular geometry

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86. What is the Bayer process?

A way of welding aluminum

A method of extracting gold

A chemical procedure in which purified aluminum oxide, Al2O3, is separated from the aluminum ore bauxite

A process of making glass

Answer

Correct Answer: A chemical procedure in which purified aluminum oxide, Al2O3, is separated from the aluminum ore bauxite

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87. What is a basic oxide?

An oxide that reacts with both acids and bases

An oxide that reacts with acids.

An oxide that reacts with bases

An oxide that doesn't react with acids

Answer

Correct Answer: An oxide that reacts with acids.

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88. What is the base-ionization constant for NH3?

5.6 x 10-5

1.0 x 10-5

8.9 x 10-5

1.8 x 10-5

Answer

Correct Answer: 1.8 x 10-5

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89. What does the base-ionization constant represent?

The equilibrium constant for the ionization of a weak acid

The equilibrium constant for the ionization of a strong acid

The equilibrium constant for the ionization of a weak base

The equilibrium constant for the ionization of a strong base

Answer

Correct Answer: The equilibrium constant for the ionization of a weak base

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90. What is the name of the process that determines the sequence of nucleotides in DNA?

Transcription

Replication

DNA fingerprinting

Translation

Answer

Correct Answer: Replication

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91. What is the process of base pairing called?

Ionic bonding

Hydrogen bonding

Van der Waals forces

Covalent bonding

Answer

Correct Answer: Hydrogen bonding

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92. What is the definition of a base according to the Brønsted?Lowry definition?

The species that accepts a proton in a proton-transfer reaction

The species that donates a proton in a proton-transfer reaction

A Bronsted acid is a molecule or ion capable of donating a proton in a proton-transfer reaction

A molecule or ion capable of accepting a pair of electrons in an electron-pair transfer reaction

Answer

Correct Answer: The species that accepts a proton in a proton-transfer reaction

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93. What is a base?

A substance that produces hydronium ions, H3O+, when it dissolves in water

A substance that produces hydrogen ions, H+, when it dissolves in water

A substance that produces hydroxide ions, OH-, when it dissolves in water

A substance that produces oxide ions, O2-, when it dissolves in water

Answer

Correct Answer: A substance that produces hydroxide ions, OH-, when it dissolves in water

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94. What is a base according to the Arrhenius definition?

A substance that produces hydrogen ions, H+, when it dissolves in water.

A substance that produces hydronium ions, H3O+, when it dissolves in water.

A substance that produces hydroxide ions, OH-, when it dissolves in water.

A substance that produces oxide ions, O2-, when it dissolves in water.

Answer

Correct Answer: A substance that produces hydroxide ions, OH-, when it dissolves in water.

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95. What is the use of a barometer?

Measuring the pressure of the atmosphere

Measuring the humidity of the atmosphere

Measuring the temperature of the atmosphere

Measuring the wind speed of the atmosphere

Answer

Correct Answer: Measuring the pressure of the atmosphere

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96. What is the value of 1 bar?

0.98692 x 105 Pa

1.01325 x 105 Pa

1 x 106 Pa

1 x 105 Pa

Answer

Correct Answer: 1 x 105 Pa

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97. What is the band theory?

A theory that explains the electrical properties of gases

A theory that explains the electrical properties of solids

A theory that explains the electrical properties of liquids

A theory that explains the electrical properties of solids and liquids

Answer

Correct Answer: A theory that explains the electrical properties of solids

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98. What does band of stability refer to?

The region in which stable nuclides lie in a plot of number of protons against number of neutrons

The region in which unstable nuclides lie in a plot of number of protons against number of neutrons

The region in which radioactive nuclides lie in a plot of number of protons against number of neutrons

Answer

Correct Answer: The region in which stable nuclides lie in a plot of number of protons against number of neutrons

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99. What is the definition of actual yield?

The quantity of product experimentally obtained from a chemical reaction.

The quantity of product from a chemical reaction that is less than the predicted or expected yield.

The predicted or expected quantity of product from a chemical reaction.

The maximum possible quantity of product from a chemical reaction.

Answer

Correct Answer: The quantity of product experimentally obtained from a chemical reaction.

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100. What is an activity series?

A list of metals ranked in order of decreasing activity.

A list of metals ranked in order of increasing activity.

A list of metals not affected by water.

A list of metals affected by water.

Answer

Correct Answer: A list of metals ranked in order of decreasing activity.

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Ecological Engineering MCQs | Topic-wise

MCQ on Basic Ecological Engineering	MCQ on Basic Mechanics
MCQ on Climate change and land use	MCQ on Ecological restoration
MCQ on Ecology	MCQ on Ecosystem Management
MCQ on Effects of Climate change on plant Physiology	MCQ on Engineering Environmental Sustainability
MCQ on Environmental And Ecological Engineering Laboratory	MCQ on Environmental And Ecological Systems Modeling
MCQ on General Chemistry	MCQ on Innovations in Agricultural systems
MCQ on Multivariate Calculus	MCQ on Nature Conservation Policy and Communication
MCQ on Remote sensing methods in Environmental Sciences	MCQ on Renewable Resources
MCQ on Territorial coherence and landscape continuity	MCQ on Theoretical and quantitative ecology
MCQ on Thermodynamics	General Ecological Engineering MCQs