Four metals $P$ , $Q$ , $R$ and $S$ react with water as given below:
I. $P$ reacts with cold water
II. $Q$ reacts with hot water
III. $R$ reacts with steam
IV. Red hot $S$ reacts with steam.
Then, highly reactive metal is:

P

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Q

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R

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S

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Solution

The correct option is A $P$
The highly reactive metal is $P$ as it reacts with cold water. This is because, the reaction with cold water requires lowest energy of activation.

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Similar questions

Three metals X, Y and Z are given. X reacts with cold water, hot water and steam. Y reacts with hot water and steam and Z reacts with steam only. Identify X, Y, and Z from the below options.

Q. This metal does not react with cold as well as hot water but reacts with steam.

Q. The reaction of

C l_{2}

gas with cold dilute and hot concentrated NaOH in water give sodium salt of two (different) oxoacids of chlorine P and Q respectively. The

C l_{2}

gas reacts with

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gas, in presence of charcoal to give a product R. R reacts with white phosphorous to give a compound S. On hydrolysis, S gives as oxoacid of phosphorous T.
P and Q, respectively, are the sodium salts of:

The reactions of $C l_{2}$ gas with cold-dilute and hot-concentrated NaOH in water give sodium salts of two different oxoacids of chlorine, P and Q, respectively. The $C l_{2}$ gas reacts with $S O_{2}$ gas, in presence of charcoal, to give a product R reacts with white phosphorus to give a compound S. On hydrolysis, S gives an oxoacid of phosphorus.

3. P and Q, respectively, are the sodium salts of

Q. A metal

X

does not react with cold water but reacts with hot water to form its hydroxide.Metal

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is more reactive than iron but less reactive than sodium.
Metal

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is:

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Four metals P, Q, R and S react with water as given below:I. P reacts with cold waterII. Q reacts with hot waterIII. R reacts with steamIV. Red hot S reacts with steam.Then, highly reactive metal is:

The correct option is A PThe highly reactive metal is P as it reacts with cold water. This is because, the reaction with cold water requires lowest energy of activation.

Four metals $P$ , $Q$ , $R$ and $S$ react with water as given below:
I. $P$ reacts with cold water
II. $Q$ reacts with hot water
III. $R$ reacts with steam
IV. Red hot $S$ reacts with steam.
Then, highly reactive metal is:

The correct option is A $P$
The highly reactive metal is $P$ as it reacts with cold water. This is because, the reaction with cold water requires lowest energy of activation.