19. HOTS questions I

 

i. The solubility of a liquidvapoursolidgas in a liquid increases as pressuredensityvolumetemperature rises.

 

ii. Sugar will dissolve fasterstupiderdumberslower in Vinu, because Vinu dissolves $50 g$ of sugar in $250 ml$ of hot water and Sarath dissolves $50 g$ of sugar in $250 ml$ of cold water.

 

 

i. Nickel sulphate pentahydrateZinc sulphate pentahydrateCopper sulphate pentahydrateIron sulphate pentahydrate is the blue-colored crystalline salt (A).

ii. Copper sulphate pentahydrate loses its blue colour when heated, yielding anhydrous Zinc sulphateNickel sulphateIron sulphateCopper sulphate (B).

iii. When waterhydrogenoxygencopper is added to anhydrous nickel sulphatezinc sulphatecopper sulphateiron sulphate (B), copper sulphate pentahydrateiron sulphate pentahydratezinc sulphate pentahydratenickel sulphate pentahydrate is formed (A).