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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? - CBSE Class 10 - Science

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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, 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?

Solution

(a) Metal M is sodium (Na), which is used as a coolant in nuclear reactors.

(b) Solution S is sodium hydroxide solution (NaOH). It is alkaline, it turns red litmus to blue.

(c) Gas G is hydrogen gas, which is lighter than air.

(d) 2Na (s) + 2H2(l) → 2NaOH (aq) + H2 (g) + HEAT

(e) This reaction is exothermic because it releases excessive heat.

  Is there an error in this question or solution?

APPEARS IN

 Lakhmir Singh Solution for Chemistry for Class 10 (2019 Exam) (2018 to Current)
Chapter 1: Chemical Reactions and Equations
Q: 52 | Page no. 23

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Solution 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? Concept: Balanced Chemical Equation.
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