Multiple choice question

12 fuEu esa ls dkSu lgh gS&
Which one is correct–
(a) �E = �H + P�V (b) �E + �V = �H
(c) �H = �E + P�V (d) �H = �E – P�V
13 fuEu esa ls fdlesa ,UVªkih eku ?kVsxk&
(a) 'kdj foy;u ls fØLVy izkIr djus esa (b) cQZ dks fi?kykus ij
(c) diwj ;k ukSlknj dk ok"iu djus esa (d) yksgs ij tax yxus esa
In which entropy will decrease–
(a) On getting crystals from sugar solution (b) On melting ice
(c) On subliming camphor or ammonium chloride (d) Rusting of iron
14 Å"ek'ks"kh vfHkfØ;k esa&
(a) �E = 0 (b) �H = (–)ve (c) �S = 0 (d) �G = 0
In an Exothermic reaction–
(a) �E = 0 (b) �H = (–)ve (c) �S = 0 (d) �G = 0
15 Å"ek{ksih fØ;k esa&
(a) mRiknksa dk H] vfHkdkjd ls de gksxk
(b) mRiknks dk H] vfHkdkjd ls vf/kd gksxk
(c) �H lnSo /kukRed gksxk
(d) mRiknksa dk H] vfHkdkjd ds cjkcj gksxk
In an Exothermic reaction–
(a) H of products will be less than reactants
(b) H of products will be more than reactants
(c) �H will always be positive
(d) H of products will be equal to reactants
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