Which of the following will produce hydrogen on decomposition by metals like $N a, K, C a$ ?

Boiling water

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Steam

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Cold water

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All of the above

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Solution

The correct option is D All of the above
$N a, K, C a$ lie at the top of the electrochemical series and are very easily oxidised which makes it a very strong reducing agent.As a result,it can reduce all the three,i.e,boiling water,steam,cold water.

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Which of the following will produce hydrogen on decomposition by metals like Na,K,Ca?

The correct option is D All of the aboveNa,K,Ca lie at the top of the electrochemical series and are very easily oxidised which makes it a very strong reducing agent.As a result,it can reduce all the three,i.e,boiling water,steam,cold water.

Which of the following will produce hydrogen on decomposition by metals like $N a, K, C a$ ?

The correct option is D All of the above
$N a, K, C a$ lie at the top of the electrochemical series and are very easily oxidised which makes it a very strong reducing agent.As a result,it can reduce all the three,i.e,boiling water,steam,cold water.