Question 4
Which one of the following metals does not react with cold as well as hot water?

a) Na
(b) Ca
(c) Mg
(d) Fe

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Solution

Option (d) is correct.

Iron does not react with cold water as well as hot water but red-hot iron reacts with steam to give its respective oxide and hydrogen gas.

$3 Fe(s) + 4 H_{2} O(g) \to {Fe}_{3} O_{4} (s) + 4 H_{2} (g)$

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Q. Question 4
Which one of the following metals does not react with cold as well as hot water?

a) Na
(b) Ca
(c) Mg
(d) Fe

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

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

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

Sodium, Potassium, Zinc and Iron.

(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?

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Reaction of Metals with Water or Steam

Standard X Chemistry

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Question 4 Which one of the following metals does not react with cold as well as hot water? a) Na (b) Ca (c) Mg (d) Fe

Option (d) is correct. Iron does not react with cold water as well as hot water but red-hot iron reacts with steam to give its respective oxide and hydrogen gas. 3Fe(s)+4H2O(g)→Fe3O4(s)+4H2(g)

Question 4
Which one of the following metals does not react with cold as well as hot water?

a) Na
(b) Ca
(c) Mg
(d) Fe

Option (d) is correct.

Iron does not react with cold water as well as hot water but red-hot iron reacts with steam to give its respective oxide and hydrogen gas.

$3 Fe(s) + 4 H_{2} O(g) \to {Fe}_{3} O_{4} (s) + 4 H_{2} (g)$