General Chemistry MCQs

1. A sample of 502 has volume 2.45 L at a pressure of 4.6 x103 Pa. What he new volume of the gas, if the pressure is changed to 1.4 x104 Pa and the temperature is kept constant?

2. At 298 K and 1 atmospheric pressure, a given mass of gas occupies the 30 mL volume. If the pressure is increased to 1.50 atmosphere and the temperature is kept constant. then what is the volume of the gas?

3. If the volume of a sample of a gas at 15°C and 1 aim is 3.12 L. then what is the volume of this gas at 42°C and 1 atm?

4. If the partial pressure of oxygen in air is 184 torr and the total atmospheric pressure is 782 torr, then what is the mole fraction of 02 present?

5. Which of the following options is the correct bond length of CC (Alkanes) bond?

6. Which of the following options is the correct bond energy of C—Br bond?

7. What is the correct atomic radii (pm) of hydrogen (H)?

8. A solution is prepared by dissolving 11.5 g of solid NaOH in enough water for making 1.40 L of the solution. What is the molarity of this solution?

9. How many protons are dissociated by polyprotic acids at a time?

10. Which of the following options is the correct Ka value of the oxyacid HCIO2?

11. What is the correct value of the pH of 1.0 X 10‘10 M HCl?

12. It is given that: TC = 190.55 K pC = 4.604 MPa VC = 99 cm3 mol

13. Which of the following options is the correct value of the molecular mass of hydrated copper sulphate (CuSoa . SHZO)?

14. Complete the given chemical reaction. 2BaS + 2H20 »

15. Complete the given chemical reaction. Fe3O4 + 8HC| » 7?

16. On heating 0.197 gm of an organic substance with excess of strong nitric acid and silver nitrate gives 3.525 gm of silver iodide. What will be the percentage of iodine in this compound?

17. In relation to the oxidation-reduction process, which of the following statements is NOT correct about an oxidized element?

18. Which of the following chemical reactions takes place between silver nitrate and the solution of neutral tartrate?

19. While dissolving 0.3 mol NH3 (g) in 54.045 9 H20 (l) at 25°C and pressure 101.325 kPa, it was found that a heat of 6870 J passed to the surroundings. Calculate the correct value of me].

20. With regard to the radioactive processes, what is the effect of positron production on neutron/proton ratio?

21. If k is the rate constant, T is the absolute temperature in kelvin, A is the pre—exponential factor, E0 is the activation energy and R is the universal gas constant, then which of the following options is correct according to Arrhenius' equation?

22. Which of the following options dissolved in chloroform is used as a nitrating agent in the organic synthesis?

23. What is the life of the uranium nuclide in the decay of Uranium — 234 (atomic number — 92) which decays to Thorium ~230 (atomic number — 90) and produces an a particle?

24. It is given that the mass of an article is 150 Q. What is the mass of the article in ounces?

25. In relation to acid-base properties of salts, which of the following options results in the production of basic solutions?

26. During which of the following types of chemical reactions, an insoluble substance, such as a solid is formed and is separated from the solution on mixing of the two solutions?

27. lfV is the volume of gas, n is the number of moles of gas particles and a is a proportionality constant, then which of the following options correctly states the Avogadro's law?

28. Which of the following laws of chemistry states that the partial vapor pressure of each component of an ideal mixture of liquids is equal to the pure component's vapor pressure multiplied with its mole fraction?

29. In relation to the ion-selective electrodes, which of the following options is used as a reference solution?

30. Which of the following chemical equations correctly represents the reaction that takes place when phosphonium iodide is heated at 60°C?

31. What is the standard reduction potential for the given reaction at 25°C? H202 (aq) + 2H1”) + 2e’-> 2H20 (I)

32. Which of the following chemical reactions correctly illustrates the heating of iron disulphate (FeSQ) at 600°C in a vacuum?

33. In relation to the base strength in aqueous solutions, which of the following options has the highest base strength?

34. Complete the given chemical reaction. Cuso4 + 2Kl 4

35. For the production of10.5 g of silver metal. how long must a current of 6.5 A should be applied to the Ag' solution?

36. Which lithium compounds has the given characteristics? - It decomposes at 380°C. - It reacts water. - It consists of white orthorhombic crystals.

37. The stirring rod is made of which of the following material?

38. Which of the following options is the correct wavelength range of infrared radiations?

39. What is the percent dissociation of an acetic acid (KB =18 x10‘5) in 0.100 M HC2H3O2 solution?

40. In relation to corrosion, which of the following chemical reaction equations is correct?

41. In relation to ammonium chloride, complete the chemical reaction. 2NH4Cl + CuC12 -v

42. Which of the following laws of chemistry states that the mole fraction of a gas dissolved in a solvent is directly proportional to the partial pressure of the gas?

43. If the half-life of molybdenum-99 is 67.0 h, then how much of a 1.000-mg sample of Mo (atomic weight = 99 and atomic number = 42) is left after 335 h?

44. What is the correct molecular formula of an organic compound that has the molecular weight of 90 and the empirical formula CHZO? It is given that, C =12, H =1, and 0 =16.

45. At a temperature of100°C and at a pressure of 27.6 MP8, the volume Occupied by two moles of carbon dioxide is 140.06 cm3. What will be the compressibility factor?

46. What is the correct elemental composition of Chromium Chloride?

47. Which of the following statements is not correct about heat?

48. Which of the following statements is not correct about the kinetic molecular theory of gases?

49. Which of the following laws of chemistry states that the molar volume of different gases at the same temperature and pressure has the same value?

50. In relation to Charles' law, what is the effect of decreasing the absolute temperature of the gas on its volume?

51. Which of the following options is the correct Lewis structure of the nitrogen molecule (N2)?

52. Which of the following types of molecules shows an inductive effect?

53. Which of the given chemical reactions correctly illustrates the synthesis of Americium (z = 95)?

54. A gas is expanded from 36 L to 59 L at a constant external pressure of17 atm. What is the work associated with the expansion?

55. What is the normal boiling temperature of ethanol?

56. What is the correct boiling point of pure nitric acid (HNO3)?

57. In relation to analytical chemistry, which of the following types of metals are present in the second group of metals?

58. Which of the given apparatuses should not be heated?

59. Name the apparatus displayed in the given image.

60. What is the balanced chemical equation for the process in which an a particle is produced by Np (atomic number: 93 and atomic mass 237)?

61. Consider a system undergoing an endothermic process in which 18.2 kJ of heat flows and where 1.6 kJ of work is done on the system. What is the value of AE for this system?

62. What is the AH for the given chemical reaction? H2 O(I) "H2O (g)

63. Complete the reaction. HCIO4 + K+ » ?

64. Which of the following options is the correct formula equation for the chemical reaction where aqueous potassium hydroxide is mixed with aqueous iron(lll) nitrate?

65. At 25°C (298 K), what is the standard reduction potentials for the given half-reaction? Cu2T + 2e' » Cu

66. Consider that aqueous potassium chloride is added to aqueous silver nitrate for forming a silver chloride precipitate plus aqueous potassium nitrate. Which of the following is the net ionic equation fc this?

67. According to the third law of thermodynamics, which of the following options is the value of the entropy of a perfect crystal at 0 K?

68. Which of the following chemical reactions will take place when the solutions of Na2504(aq) is mixed with Pb(N03)2 (aq)?

69. Which of the following laws of chemistry states that the pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases?

70. Consider a molecule of N2 at a temperature of 293 K with a mass of 4.6 X 102'3 kg. Which of the following options is a correct value of the velocity of nitrogen molecule, if its kinetic energy is 3ka/2 and the velocity is mv2/2? (Value of kb is 1.4 x1023)

71. In the given image. which of the following options is a utility clamp?

72. In the given image. which of the following chemical reactions correctly expresses the decomposition of magnesium nitride?

73. Which of the following chemical reactions correctly explains the oxidization of hydrobromic acid by atmospheric oxygen?

74. What is the color of Phenolphthalein indicator with H‘?

75. If the Ka value for AI(H20)53' is 1.4 x10‘5, then which of the following options is the correct value of the pH of 0.010 M AICI3?

76. On dissolving 1.355 gm of a substance in 55 gm of acetic acid results a depression of 0.618°C in the freezing point. If the molecular depression of the freezing point of 100 gm acetic acid is 385°C, then what will be the correct molecular weight of the dissolved substance?

77. In the given image, which of the following chemical reactions correctly represents the process of dissolution of ammonium nitrate (NH4N03) in water?

78. Convert the temperature of 40°C into Kelvin (K) and Fahrenheit (°F).

79. While using the Carius method for an estimation of sulphur, 0.2175 gm of the substance gave 0.5825 gm of barium sulphate. Which of the following options will be the correct percentage of sulphur in this substance?

80. In the chemistry lab, which of the following equipments is used to dispense and transfer the known volumes of fluids?

81. If the Ka value for HF is 7.2 X 10“, then what is the correct pH of 0.30 M NaF solution?

82. PbSOa is precipitated on mixing the aqueous solution of Na2804 and Pb2(NO3)2. If 1.25 L of 00500 M Pb2(N03)2 and 2.00 L of 0.0250 M Na2504 are mixed. then what is the mass of PbSOa formed?

83. What output is obtained after the given expression is simplified?

84. Which two roots are produced after the simplif‌ication of the given quadratic equation? 3x2 -4x + 1

85. What is the density of H2O at 25° C?

86. In order to prepare 2.5 L of a 0.10 M HzSOd solution, what volume of 26 M sulphuric acid must be used?

87. Which of the following options is used for lighting the bunsen burner?

88. Which of the following radioactive nuclides is used for studying the bones?

89. Which of the following statements is true?

90. The aqueous solution of which of the following salts will be neutral?

91. Which of the following options is the def‌inition of acid according to the Bronsted-Lowry model of acids and bases?

92. Which of the following options is the correct value of change in energy?

93. At 25°C. what is the enthalpy of formation for C02 (g)?

94. If 890 kJ of energy is released as heat on burning 1 mole of methane (CH4) at a constant pressure. then what is the AH for a process in which a 9.6-9 sample of methane is burned at the constant pressure?

95. Which of the following options is the correct oxidation state of the carbon atom in C02?

96. Which of the following chemical reactions takes place when vanadium pentoxide is heated with chlorine gas in the presence of carbon at 750°C?

97. What is the correct molecular weight of chlorine dioxide (CIO2)?

98. Which is the pertinent half-reactions for a galvanic cell based on redox reaction? Fe3'(aq) + Cu(s)-> Cuz'laq) + Fe2'(aq)

99. In a sample of helium gas at 25°C, what is the root mean square velocity for the atoms?

100. According to the third law of thermodynamics. which of the following options is the value of the entropy of a perfect crystal at 0 K?

101. Consider a heat engine that received 700 J of heat from the warmer reservoir and supplied 600 J of heat to the cooler reservoir. It then returned to its initial state. What is the correct amount of work performed by the engine?

102. In a unit lattice of zinc blend structure, there are cations and anions.

103. What is the mass of carbon present in bituminous coal?

104. It is given that a sample of hydrogen gas (H2) has a volume of 9.00 L at a temperature 0°C and at a pressure of 1.2 atm. What is the moles of H2 molecules present in the gas in accordance with the Ideal gas Law I?

105. Which of the following options is/are the correct physical properties of aluminium chloride?

106. Which of the following statements are correct about the tungstic acid (H2W02)?

107. For which two of the following salts, cation is from strong base while anion is from weak acid?

108. Which of the following statements are correct about phosphine (PH3)?

109. Wet reaction of lithium chloride with which of the following options does not produce any precipitation?

110. Which of the following compounds are of Cadmium iodide crystal type?

111. Phosphorus can exist in which of the following allotropic forms?

112. Which of the following options are the characteristics of Ozone (03)?

113. In relation to the solubility of salts in water, salts containing which of the following ions are soluble?

114. ________ tends to be clear and light-bodied.

115. Autoreceptors are located on the _______ and detect _______.

116. Binding of the neurotransmitter to its receptor causes the membrane to __________.

117. Cooking oil and gasoline (a hydrocarbon) are not amphipathic molecules because they _____.

118. Foods are ___________ composed of elements from the periodic table.

119. In general, the lipids that we refer to as oils have ________.

120. Clf3 has "t-shaped" geometry. there are __________ non-bonding domains in this molecule.

121. According to the aufbau principle ____

122. Large intermolecular forces in a substance are manifested by ________.

123. All of the ________ have a valence shell electron configuration ns1.

124. Physician office __________ codes are submitted for reimbursement purposes.

125. Of the following metals, __________ exhibits multiple oxidation states.

126. E) ____ is/represents a positively charged species.

127. Of the following gases, __________ will have the greatest rate of effusion at a given temperature.

128. 50.0 g of cl2 contains ________ mol cl2.

129. Air near earth's surface tends to be ________.

130. Beer is a brewed and fermented beverage made from ________ and flavored with ________.

131. If all of the stratospheric ozone suddenly disappeared, ________.

132. In developed countries, the two most deadly sources of indoor pollution are ________.

133. Neuropeptides are synthesized in the ____.

134. The [h3o+] of a solution with ph = 9.7 is ________.

135. The h3o+ ion is called the ________ ion.

136. We would expect the salinity of surface waters to be higher in regions where __________.

137. The density (mass per volume) of most liquids increases as the __________ is lowered.

138. The reaction between strontium hydroxide and chloric acid produces ________.

139. The volume of a sample of gas (2.49 g) was 752 ml at 1.98 atm and 62 c. the gas is ________.

140. There are ________ mol of bromide ions in 0.300 l of a 0.150 m solution of albr3.

141. When the kelvin temperature of an enclosed gas doubles, the particles of the gas ____.

142. Ti has __________ in its d orbitals.

143. Typically, amides will hydrolyze under ________ conditions than esters.

144. The density of chlorine gas at 1.21 atm and 34.9c is ________ g/l.

145. Of the species below, only __________ is not an electrolyte.

146. J. j. thomson used ____________ to measure the ____________ of a cathode ray particle.

147. The ________ have the most negative electron affinities.

148. The angular momentum quantum number is 3 in __________ orbitals.

149. The spectra of atoms reveals their _________.

150. When cool, dense air from over the water flows inland, it's called a ____.

151. Violent shaking from an earthquake can cause soil and rock on slopes to fall and cause a _____.

152. The name of a binary compound ends with _____

153. All of the following are considered indoor air pollutants except ________.

154. Temperature and silica content determine the _______ of magma.

155. The names of all binary compounds, both ionic and molecular, end in the letters ____.

156. When 7.3 g of c3h8 burns in the presence of excess o2, __________ g of co2 is produced.

157. When a part of the body is injured, substances called ________ are released.

158. New renewables include ________.

159. The ____ is the nuclear fusion of three helium nuclei to form a carbon nucleus.

160. A molecule with the formula ax4 uses _________ to form its bonds.

161. According to rounding rules for addition, the sum of 27.1, 34.538, and 37.68 is ____.

162. Cohesion, surface tension, and adhesion are the properties of water molecules that ________.

163. Of the elements below, __________ has the highest melting point.

164. One hundred proof alcohol has a __________ alcohol content.

165. From the equation g = h ts, it can be concluded that __________.

166. A(n) ________ tends to be fuller bodied and more bitter than the average beer.

167. Nitric acid, hno3, _____.

168. Of the following, ________ are market mechanisms for addressing climate change.

169. On advantage of nitric oxide is that it ____.

170. Sherrington inferred the presence of a gap between neurons based on ________ .

171. The ideal gas law measures volume in _______

172. The mass of a nucleus is ___________________________ the sum of the masses of its nucleons.

173. The most obvious cause of industrial smog is ________.

174. Water moves up a plant because of hydrogen bonds by a process called __________.

175. Water is considered a polar molecule because it _____

176. Some scientists hypothesize that earth's ozone layer is being damaged by ____.

177. The term "opioid" refers to ________, while the term "opiates" refers to ________.

178. A lipoprotein particle functions to ________.

179. The stomach excretes ________ to kill microorganisms and to activate enzymes that break down food.

180. All of the following are major steps to controlling air pollution except ________.

181. All of the following contain amino acids except _____.

182. An unstable nucleus ____. (1 point)

183. Arrow d is indicating a _____ protein.

184. Auroras occur in the _______.

185. Cabernet sauvignon and pinot noir are types of ________ wine.

186. Hydrates that have a low vapor pressure and remove moisture from air are said to be ___.

187. ________ is a device designed to remove airborne pollutants from smokestack emissions.

188. "physiological ph," the ph for optimum activity for most enzymes, is a ph equal to about ________.

189. 650. j is the same amount of energy as ________.

190. A carbohydrate that gives two molecules when it is completely hydrolyzed is known as a ________.

191. Air pollution in tehran ________.

192. Anomers of d-glucopyranose differ in their stereochemistry at ________.

193. (chad deity) che chavez castro is __________.

194. The formation of an enzyme-substrate complex is the ________ step in enzyme action.

195. The lewis structure of ash3 shows ________ nonbonding electron pair(s) on as.

196. The line connecting the triple point and the critical point on a phase diagram represents _____.

197. The mechanism of chymotrypsin proceeds in _____ step(s) linked by a covalently bound intermediate.

198. The molecular geometry of the phcl2 molecule is ________.

199. When the following equation is balanced, the coefficients are ________. c8h18 + o2 co2 + h2o

200. When two protein chains combine to form an active protein, the structural level is __________.

201. The cellulase in this experiment came from _______.

202. In canning, the target heat treatment is considered the _____ reduction of clostridium botulinum

203. Radiometric dating is possible because the rates of decay of radioactive isotopes _____.

204. The charge on the manganese in the salt mnf3 is ________.

205. The bonding of two amino acid molecules to form a larger molecule requires the _____.

206. The effective nuclear charge of an atom is primarily affected by ________.

207. The element in this list with chemical properties similar to magnesium is ________.

208. Ionotropic effects are characterized by ____.

209. It is really improper to discuss or classify climate with any record less than ________.

210. The drug xanax reduces anxiety by binding to the _______receptor as a(n) _______:

211. In the gas phase reaction below, nh3 is acting as a(n) ________ base but not as a(n) ________ base.

212. The density of __________ is 0.900 g/l at stp.

213. Complete the relationship. __________ mg = __________ g.

214. Radiometric dating _____.