What happens when zinc react with hot and concentrated KOH?

Water is formed along with corresponding soluble salt

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Hydrogen gas is liberated.

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Corresponding insoluble salt is formed

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Oxygen gas is liberated

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Solution

The correct option is B
Hydrogen gas is liberated.

Zinc reacts with hot and concentrated KOH to give potassium zincate and liberate hydrogen gas.

$Z n + 2 K O H H o t a n d c o n c . \to K_{2} Z n O_{2} S o l u b l e s a l t + H_{2}$

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Similar questions

When zinc react with hot and concentrated NaOH, a colourless salt is formed. Name this colourless salt.

When lead reacts with NaOH, a colourless salt X is formed along with hydrogen gas. Name the salt X.

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