Which of the following metals on reaction with cold water liberates hydrogen gas but does not float on water (unlike Calcium) due to its vigorous reaction (with water)?

Sodium (Na)

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Calcium (Ca)

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Gold (Au)

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Zinc (Zn)

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Solution

The correct option is A Sodium (Na)
Metals such as potassium and sodium react violently with cold water. The reaction is so violent and exothermic that the evolved hydrogen immediately catches fire.

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Similar questions

Which of the following metal on reaction with cold water liberates hydrogen gas but does not float on water?

(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?

Q. Metal which does not react with cold water but reacts with steam to liberate

H_{2}

gas is :

Q. Assertion :Calcium floats over water during the reaction with water. Reason: Calcium reacts with water less vigorously so that the heat evolved is not sufficient for the hydrogen formed, to catch fire. The bubbles of hydrogen gas formed stick to the surface of the water calcium

Q. Which of the following metals floats in its reactions with cold water?

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Which of the following metals on reaction with cold water liberates hydrogen gas but does not float on water (unlike Calcium) due to its vigorous reaction (with water)?

The correct option is A Sodium (Na)Metals such as potassium and sodium react violently with cold water. The reaction is so violent and exothermic that the evolved hydrogen immediately catches fire.

The correct option is A Sodium (Na)
Metals such as potassium and sodium react violently with cold water. The reaction is so violent and exothermic that the evolved hydrogen immediately catches fire.