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86. A gas is collected over the water at 25°C. The total pressure of moist gas was 735 mm of mercury. If the aqueous vapour pressure at 25°C is 23.8 mm. Then the pressure of dry gas is

(a)  760 mm                                     (b)  758.8 mm

(c)  710.8 mm                                  (d)  711.2 mm

Answer-d

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