The metal which does not react with cold as well as hot water but, reacts with steam is

sodium

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potassium

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magnesium

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iron

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Solution

The correct option is D
iron

Different metals react differently with water. Sodium and potassium react vigorously with cold water to form sodium hydroxide and potassium hydroxide. Magnesium reacts with hot water to give magnesium hydroxide. Iron does not react with cold water as well as hot water but with steam, the red-hot iron reacts to give its respective oxide and hydrogen gas. The reaction for the same is given below:

$3 F e (s) + 4 H_{2} O (g) \to F e_{3} O_{4} (s) + 4 H_{2} (g)$

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Similar questions

(a) Name a metal for each case:
(i) it does not react with cold as well as hot water but reacts with steam.
(ii) It does not react with any physical state of water.

(b) When calcium metal is added to water, the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?

Which one of the given metals does not react with cold as well as hot water?

Q. Assertion: Sodium reacts vigorously with cold water but magnesium does not react with cold water.
Reason: Sodium is more reactive than magnesium.

Q. From the metals-copper, iron, magnesium, sodium and zinc-select a different metal in each case which :
(a) does not react with dilute hydrochloric acid.
(b) can form 2⁺ and 3⁺ ions.
(c) has a hydroxide that reacts with both acids and alkalis.
(d) does not react with cold water, but reacts with steam when heated.

Sort the elements which do not react with hot as well as cold water.

Sodium, Potassium, Zinc and Iron.

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