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2. Vapour pressure of chloroform and dichloromethane at

25° C are 200 mm Hg and 41.5mm Hg respectively. Vapour pressure of the solution obtained by mixing 25.5g of CHCl3 and 40g of CH2 Cl2 at the same temperature will be (Molecular mass of CHCl3  =  119.5u and molecular mass of CH2  Cl2 = 85u)

a. 90.92 mm Hg

b. 615.0 mm Hg

c. 347.9 mm Hg

d. 285.5 mm Hg

Ans. a

(41)

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