Copper can produce hydrogen on reacting with acids but zinc cannot.

True

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False

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Solution

The correct option is B
False

Zinc can produce hydrogen on reacting with acids but copper cannot. Since zinc is above hydrogen in the electrochemical series, it is more electropositive and can displace hydrogen from acids like HCl, $H_{2} S O_{4}, H N O_{3}$ .

$Z n + H_{2} S O_{4}$ (dil.) $\to Z n S O_{4} + H_{2}$

Whereas Cu is below hydrogen and is less electropositive than hydrogen. Therefore, It cannot displace hydrogen from acids.

$C u + H_{2} S O_{4}$ (dil.) $\to$ No reaction occurs

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Q. Why does zinc react with sulphuric acid to give hydrogen age but copper does not?

Mark ‘True’ if the statement is true and ‘False’ if it is false.
(a) Generally, non-metals react with acids.(b) Sodium is a very reactive metal.
(c) Copper displaces zinc from zinc sulphate solution.
(d) Coal can be drawn into wires.

State whether the following statements are true or false :

(a) All metals exist in solid form at room temperature.

(b) Coal can be drawn into wires.

(d) Sodium is a very reactive metal.

(e) Copper displaces zinc from zinc sulphate solution.

(f) Rust formed on iron objects is basic in nature.

(g) Non-metals react with water to form a gas which burns with a 'pop' sound.

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