Assertion Reasoning Quiz

Question 1 of 7

Assertion (A): During the electrolysis of water, the volume of gas collected in the test tube inverted over the cathode is twice the volume collected at the anode.
Reason (R): Positively charged hydrogen ions (H⁺) migrate to the anode to gain electrons, while negative hydroxide ions migrate to the cathode.

A Both A and R are true and R is the correct explanation of A. B Both A and R are true but R is not the correct explanation of A. C A is true but R is false. D A is false but R is true.

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Question 2 of 7

Assertion (A): Silver articles develop a black tarnish when exposed to air, whereas copper vessels develop a greenish coating upon long exposure to moist air.
Reason (R): Rusting of iron is an electrochemical process that requires the simultaneous presence of both moisture and oxygen gas.

A Both A and R are true and R is the correct explanation of A. B Both A and R are true but R is not the correct explanation of A. C A is true but R is false. D A is false but R is true.

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Question 3 of 7

Assertion (A): Adding water to quicklime (CaO) in a glass beaker is an endothermic reaction because energy is absorbed to form slaked lime.
Reason (R): Calcium oxide reacts vigorously with water in a combination reaction to produce calcium hydroxide while liberating a large amount of heat energy.

A Both A and R are true and R is the correct explanation of A. B Both A and R are true but R is not the correct explanation of A. C A is true but R is false. D A is false but R is true.

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Question 4 of 7

Assertion (A): Zinc dust reacts with dilute hydrochloric acid much faster than a solid zinc block of equal total mass.
Reason (R): Subdividing a solid into fine powder increases its effective surface area, leading to more frequent particle collisions per unit time.

A Both A and R are true and R is the correct explanation of A. B Both A and R are true but R is not the correct explanation of A. C A is true but R is false. D A is false but R is true.

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Question 5 of 7

Assertion (A): Carbon dioxide turns lime water milky.
Reason (R): Carbon dioxide sullies the water.

A Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A). B Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A). C Assertion (A) is true but reason (R) is false. D Assertion (A) is false but reason (R) is true.

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Question 6 of 7

Assertion (A): Dropping a piece of copper wire into an aqueous solution of zinc sulphate causes the colorless solution to turn bright blue.
Reason (R): Copper cannot displace zinc metal from zinc sulphate solution because copper has a lower reactivity than zinc.

A Both A and R are true and R is the correct explanation of A. B Both A and R are true but R is not the correct explanation of A. C A is true but R is false. D A is false but R is true.

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Question 7 of 7

Assertion (A): A chemical reaction becomes faster at higher temperatures.
Reason (R): At higher temperatures, molecular motion becomes more rapid.

A Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A). B Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A). C Assertion (A) is true but reason (R) is false. D Assertion (A) is false but reason (R) is true.

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Assertion Reasoning Quiz