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Chemical Properties of Metals

The metal M r...

Question

The metal M reacts vigorously with water to form a solution S and a gas G. The solution S turns red litmus to blue whereas gas G, Whcih is lighter than air, burns with a pop sound. Metal M has a low melting point and it is used as a coolant in nuclear reactors.

(a) What is metal M ?

(b) What is solution S ? Is it acidic or alkaline ?

(c) What is gas G ?

(d) Write a balanced chemical equation for the reaction which takes when metal M reacts with water.

(e) Is this reaction exothermic or endothermic ?

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Solution

(a) Metal M is Sodium(Na).

(b) Solution S is NaOH which is alkaline as it turns red litmus blue.

(c) Gas G is Hydrogen as it is the lightest and burns with pop sound.

(d) $2 N a + 2 H_{2} O ⟶ 2 N a O H + H_{2} + h e a t$

(e) This reaction is exothermic.

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Q. The metal M reacts vigorously with water to form a solution S and a gas G. The solution S turns red litmus to blue whereas gas G, which is lighter than air, burns with a pop sound. Metal M has a low melting point and it is used as a coolant in nuclear reactors.
(a) What is metal M?
(b) What is solution S? Is it acidic or alkaline?
(c) What is gas G?
(d) Write a balanced chemical equation for the reaction which takes place when metal M reacts with water.
(e) Is this reaction exothermic or endothermic?

Q. Hydrochloric acid reacts with a metal X to form a gas Y which burns with a 'pop' sound. Sodium hydroxide solution also reacts with the same metal X (on heating) to form the same gas Y.
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Q. Hydrochloric acid reacts with a metal 'A' to form a gas 'B' which burns with a 'pop' sound. Sodium hydroxide solution also reacts with the same metal A on heating to form the same gas B
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(b) Sodium hydroxide soln

Q. Metal M is a major constituent of steel. On reaction with dilute hydrochloric acid, M releases a gas G which burns with a pop sound along with the formation of a greenish coloured solution C.

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Sodium metal reacts vigorously with water.

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