Assertion Reasoning Quiz

Question 1 of 7

Assertion (A): Usually the sulphide ore is converted to oxide before reduction.
Reason (R): Reduction of oxides occurs easier.

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): In the metallurgy of AI, purified \(\mathrm{Al}_2 \mathrm{O}_3\) is mixed with \(\mathrm{Na}_3\) \(\mathrm{AIF}_6\) or \(\mathrm{CaF}_2\).
Reason (R): It lowers the melting point of the mixture and brings conductivity.

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): A mineral is called ore, when metal is extracted from it conveniently and economically.
Reason (R): All ores are minerals but all minerals are not ores.

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): Metals are sonorous.
Reason (R): They are generally brittle in the solid state; they break into pieces when hammered.

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): When a piece of copper metal is added to dilute sulphuric acid, the solution turns blue.
Reason (R): Copper reacts with dilute sulphuric acid to form blue copper (II) sulphate solution.

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 6 of 7

Assertion (A): While the extraction of copper, one of the steps involved is \(\mathrm{Cu}_2 \mathrm{~S}+2 \mathrm{Cu}_2 \mathrm{O} \rightarrow 6 \mathrm{Cu}+\mathrm{SO}_2\)
Reason (R) : In this reaction \(\mathrm{Cu}_2 \mathrm{~S}\) is the reducing agent whereas \(\mathrm{Cu}_2 \mathrm{O}\) is the oxidising agent.

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): In the alumino thermite process, the metals like iron melt due to the heat evolved in the reaction.
Reason (R): The reaction is: \(\mathrm{Fe}_2 \mathrm{O}_3+2 \mathrm{Al} \rightarrow \mathrm{Al}_2 \mathrm{O}_3+2 \mathrm{Fe}\)

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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Assertion Reasoning Quiz