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Select the most appropriate option. Which of the following reactions is exothermic? - Chemistry

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MCQ

Select the most appropriate option.

Which of the following reactions is exothermic?

Options

  • H2(g)  →  2H(g)

  • C(s)  →  C(g) 

  • 2Cl(g)  →  Cl2(g) 

  • H2O(s)  →   H2O(l)  

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Solution

2Cl(g)  →  Cl2(g) 

Hint:

Bond is formed between two Cl atoms and hence, energy is released.

Concept: Thermochemistry
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APPEARS IN

Balbharati Chemistry 12th Standard HSC for Maharashtra State Board
Chapter 4 Chemical Thermodynamics
Exercises | Q 1.05 | Page 87
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