Cooking is fast in a pressure cooker, because
food particles are effectively smashed
water boils at higher temperature inside the pressure cooker
food is cooked at constant volume
loss of heat due to radiation is minimum
1 g of silver gets distributed between 10 cm3 of molten zinc and 100 cm3 of molten lead at 800°C. The percentage of silver still left in the lead layer is approximately
2
5
3
1
Asolution of two liquids boils at a temperature more than the boiling point of either of them. Hence, the binary solution shows
negative deviation from Raoult's law
positive deviation from Raoult's law
no deviation from Raoult's law
positive or negative deviation from Raoult's law depending upon the composition
A solution of 1.25 of 'P' in 50 g of water lowers freezing point by 0.3°0. Molar mass of 'P' is 94. Kf(water) = 1.86 K kg mol-1. The degree of association of 'P' in water is
80%
60%
65%
75%
Which of the following is not a colligative property?
Elevation in boiling point
Depression in freezing point
Osmotic pressure
Lowering of vapour pressure
3 g of urea is dissolved in 45 g of H2O. The relative lowering in vapour pressure is
0.05
0.04
0.02
0.01
Which of the following aqueous solution will exhibit highest boiling point?
0.01M urea
0.01 M KNO3
0.01M Na2SO4
0.015M C6H12O6
C.
0.01M Na2SO4
Which of the following is not a colligative property?
Osmotic pressure
Optical activity
Depression in freezing point
Elevation in boiling point
Which of the following aqueous solution has the highest freezing point?
0.1M surcose
0.01 M NaCl
0.1 M NaCl
0.01 M Na2SO4