Hydrogen gas is evolved when copper turnings are added to dilute sulphuric acid.

True

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False

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Solution

The correct option is B
False

Hydrogen has higher reactivity than copper and thus cannot replace hydrogen from dilute sulphuric acid. But, it reacts with concentrated sulphuric acid.

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Similar questions

Hydrogen gas is evolved when copper turnings are added to the sulphuric acid.

Dilute acids like hydrochloric acid (HCl), sulphuric acid $H_{2} S O_{4}$ react with certain active metals to evolve hydrogen gas and form their metallic salts.

Q. Copper can displace hydrogen gas from dilute acids – True or False?

Q. When concentrated sulphuric acid was added to an unknown salt present in a test tube a brown gas(A) was evolved. This gas intensified when copper turnings were added to this test tube. On cooling, the gas(A) changes into a colourless solid(B).
Why does gas(A) change to solid on cooling?

Dilute acids such as hydrochloric acid (HCl) and sulphuric acid $H_{2} S O_{4}$ react with certain active metals to evolve hydrogen gas and form their respective metallic salts.

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Hydrogen gas is evolved when copper turnings are added to dilute sulphuric acid.

The correct option is B False Hydrogen has higher reactivity than copper and thus cannot replace hydrogen from dilute sulphuric acid. But, it reacts with concentrated sulphuric acid.

The correct option is B
False

Hydrogen has higher reactivity than copper and thus cannot replace hydrogen from dilute sulphuric acid. But, it reacts with concentrated sulphuric acid.