class 12 Solution test paper 1

GYANODAY ACADEMY

VB JHA

SOLUTION (Xll)

May Marks 20 TIME 80 1.5tr

2.1. Henry's law Constant for coz in water 10×167 مد Pa at 298k. Calculate the quantity of 102 in 500 mlof Soda water when packed under 2.5 atem cos pressure at 298k.

3

4.2 write Henry's lawand give two application of taw with explanation.

2.3. what are the colligative pricipal? Describe each of them.

3

Q.4. Two elements A & B from compocends having formula AB, and Aby shen dissolved in 20g of benzene (Cotts), 1 g of AB₂ lowers the freezing peint by 2.3k whereas 1g of AB, lowers it by 1.sk. The moler depression constant for benzene is 5.2 K kg mot. Calculate atomic massed of AfB.

3③

6.5. Calculate the mass pescentage of asperin (CqH8O4) In acetonitrile (CH₃CH) when 6.5 g of CqH804 is dissolved in 450 g of CH₃CN. 3

6. 6. vapour pressure of water at 293k is 17.535 mm Hg. calculate the vapour pressure of water at 293k when 25g of glucose is dissolved in 450 g of water

. B

Q.7. If the density of some lake water is 1.25gmt" and contains 92g of Na sous per kg of water. Calculate the molarity of Nat lous in the lake.

3