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Strength of Acids and Bases

When hydrogen...

Question

When hydrogen is passed over a black solid compound A, the products are 'a colorless liquid' and 'a reddish-brown metal B .’ Substance B is divided into two parts, each placed in separate test tubes.
Dilute HCl is added to one part of substance B and dilute $H N O_{3}$ to the other.
Is there any reaction between substance B and hydrochloric acid?Give reason for your answer.

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Solution

The substance (B) produced here is copper metal.
Since copper is placed below hydrogen in the reactivity series, it does not react with HCl.

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Strength of Acids and Bases

Standard X Chemistry

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