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Chemical Reactions MCQ

Hazardous substances while toxins are .

Personal biases and preferences as well as logic.

They are becoming resistant to antibiotics.

A minimal amount is taken into the body.

Are dangerous substances; poisonous substances

Answer

Correct Answer: Are dangerous substances; poisonous substances

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Tooth fillings are often made of gold or porcelain because these materials are ______.

Explosive

Visually pleasing

Non-reactive

Chemically similar to teeth

Answer

Correct Answer: Non-reactive

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The oxidation number of hydrogen when it is in a compound other than a hydride is _____.

Answer

Correct Answer: +1

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The ground-state electron configuration of the element ________ is [kr]5s14d5.

All of these

Answer

Correct Answer: Mo

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The concentration of iodide ions in a 0.193 m solution of barium iodide is __________.

0.193 M

0.386 M

0.0965 M

0.579 M

0.0643 M

Answer

Correct Answer: 0.386 M

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Environmental bioremediation using bacteria is least effective on _____.

Heavy metals

Number of digits

Decimal point

None of these

Answer

Correct Answer: Heavy metals

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Of the possible bonds between carbon atoms (single, double, and triple), ________.

A triple bond is longer than a single bond.

A double bond is stronger than a triple bond.

A single bond is stronger than a triple bond.

A double bond is longer than a triple bond.

A single bond is stronger than a double bond

Answer

Correct Answer: A double bond is longer than a triple bond.

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Oxidation cannot occur without ________.

Oxygen.

Water.

Reduction.

Air.

Acid

Answer

Correct Answer: Reduction.

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In general, as activation energy increases, reaction rate ________.

Goes down if the reaction is exothermic.

Goes down if the reaction is endothermic.

Stays the same regardless of whether the reaction is exothermic or endothermic.

Goes down regardless of whether the reaction is exothermic or endothermic.

None of the above

Answer

Correct Answer: Goes down if the reaction is endothermic.

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The rate law of a reaction is rate = k[d][x]. the units of the rate constant are ________.

Mol L⁻¹ s⁻¹

L mol⁻¹ s⁻¹

Mol2 L⁻² s⁻¹

Mol L⁻¹ s⁻²

Answer

Correct Answer: L mol⁻¹ s⁻¹

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The electron configuration [kr]4d10 represents __________.

Sr+2

Sn+2

Te+2

Ag+1

Answer

Correct Answer: Ag+1

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_c2h6(g)+o2(g)→co2(g)+__h2o(g)

2,7,4,6

3,4,5,6

6,4,7,2

7,2,6,4

Answer

Correct Answer: 2,7,4,6

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Chemical Reactions MCQ

Hazardous substances ______________ while toxins are ______________.

Tooth fillings are often made of gold or porcelain because these materials are ______.

The oxidation number of hydrogen when it is in a compound other than a hydride is _____.

The ground-state electron configuration of the element ________ is [kr]5s14d5.

The concentration of iodide ions in a 0.193 m solution of barium iodide is __________.

Environmental bioremediation using bacteria is least effective on _____.

Of the possible bonds between carbon atoms (single, double, and triple), ________.

Oxidation cannot occur without ________.

In general, as activation energy increases, reaction rate ________.

The rate law of a reaction is rate = k[d][x]. the units of the rate constant are ________.

The electron configuration [kr]4d10 represents __________.

___c2h6(g)+____o2(g)→____co2(g)+____h2o(g)

Hazardous substances while toxins are .

_c2h6(g)+o2(g)→co2(g)+__h2o(g)