What is the decrease in volume of air when pyrogallol is shaken with 30.00cm3 of air ?
15.00cm3
6.30cm3
0.63cm3
0.06cm3
Correct answer is B
% volume of O2 in air = 21%
∴ (21/100) * 30 = 6.3
Distillation
Condensation
Extraction
Evaporation
Correct answer is A
No explanation has been provided for this answer.
Deliquescent substance are used for
Cooling
Wetting
Melting
Drying
Correct answer is D
No explanation has been provided for this answer.
The pollution from petroleum spillage in rivers and lakes can best be dispersed by
Pouring detergents
Passing of ships through the area
Pouring organic solvents
Evaporation
Correct answer is A
No explanation has been provided for this answer.
It increase with increase in pressure
It increase at constant temperature
It increase with increase in temperature
It increase with increase in volume
Correct answer is C
No explanation has been provided for this answer.