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Laws of chemical combination and mole concept
List – I    List – II
A) Law of conservation of mass 1) V₁/V₂ = n₁/n₂
B) Avogadro’s Law    2) 2H_2(g) + O_2(g) $\to$ 2H₂O_(g)
C) Gay-Lussac’s Law of combining volumes 3) 12g of C + 32g of O₂ = 44g CO₂
D) Law of conservation of energy    4) H_2(g) + Cl_2(g) $\to$ 2HCl_(g)
5) H_2(g) + Cl_2(g) $\to$ 2HCl_(g), $∆$ H = -184.6kJ
The correct match is

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A-3, B-1, C- , D-5

A-3, B-1, C-5, D-4

A-3, B-1, C-2, D-5

A-1, B-2, C-4, D-5

answer is A.

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Detailed Solution

Gay-Lussac’s Law of combining volumes:

The law of combining volumes states that, when gases react together to form other gases, all volumes are measured at the same temperature and pressure.

Law of conservation of energy :

The law of conservation of energy states that energy can neither be created nor be destroyed.

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