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Standard X

Chemistry

Rancidity

A Brown and b...

Question

A Brown and bright element “x”, when heated in presence of air, turns into a black substance “y”. If Hydrogen gas is passed over this heating material again “x” is obtained. “x” and “y” are –

S &

S

O_{2}

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Na & NaH

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C &

{CO}_{2}

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Cu & CuO

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Solution

The correct option is D Cu & CuO
Cu & CuO

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A Brown and bright element “x”, when heated in presence of air, turns into a black substance “y”. If Hydrogen gas is passed over this heating material again “x” is obtained. “x” and “y” are –

The correct option is D Cu & CuOCu & CuO

The correct option is D Cu & CuO
Cu & CuO