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Q.

Equal volumes of molar HCl and H2SO4 are neutralised by dilute NaOH solution and xK.cal and yK.cal of heat are liberated respecitvely. Which of the following is true?

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a

x = y/3

b

x = y/2

c

x = y

d

x = 2y

answer is B.

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Detailed Solution

Heat released when 1 equivalent of acid is neutralized by 1 equivalent of base is known as heat of neutralization.

1 mole of HCl = 1 equivalent of HCl

1 mole of H2SO4 = 2 equivalent of H2SO4

Heat released when equal volumes of 1M NaOH is neutralized by 1M HCl = H=X Kcal

Heat released when equal volumes of 1M NaOH is neutralized by 1M H2SO4H=2X Kcal

Given 2X Kcal = y; X=y2

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