Consider the below statements and identify the correct answer.
Statement-I: On heating, the surface of copper powder becomes coated with black copper (II) oxide.
Statement-II: If hydrogen gas is passed over this heated material (CuO), the black coating on the surface turns brown.

Question

Consider the below statements and identify the correct answer.
Statement-I: On heating, the surface of copper powder becomes coated with black copper (II) oxide.
Statement-II: If hydrogen gas is passed over this heated material (CuO), the black coating on the surface turns brown. — Exam MCQ

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D. Both the statements are true. — Statement I: When copper powder is heated, it reacts with oxygen to form black copper(II) oxide (CuO), an oxidation reaction. Statement II: When hydrogen gas is passed over the heated copper(II) oxide (CuO), it reduces the black CuO to brown copper metal (Cu) and forms water (H2O), a reduction reaction.

rrbjepyq.in · Answer

A. Both the statements are false.

rrbjepyq.in · Answer

B. Statement-I is true, and Statement-II is false.

rrbjepyq.in · Answer

C. Statement-I is false, and Statement-II is true.

Consider the below statements and identify the correct answer. Statement-I: On heating, the surface of copper powder becomes coated with black copper (II) oxide. Statement-II: If hydrogen gas is passed over this heated material (CuO), the black coating on the surface turns brown.

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