Liquids and Solids Test 6

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A test from chapter 4 i.e Liquids and Solids of Chemistry part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.

1. Vapor pressure of water at 0 degree centigrade is

A) 200 torr
B) 760 torr
C) 4.8 torr
D) none

2. When external pressure is 23.7 torr, boiling point of water is

A) 25 degree centigrade
B) 98 degree centigrade
C) 100 degree centigrade
D) 120 degree centigrade

3. Down the group polarizibility generally

A) increases
B) decreases
C) remain constant
D) no regular trend

4. Molar heat of vaporization of water in kJ/mole

A) 14.6
B) 14.6
C) 18
D) 40.6

5. At equilibrium, rate of evaporation and rate of condensation become

A) equal
B) very high
C) very low
D) none

6. distillation under very reduced pressure is called as

A) fractional distillation
B) vacuum distillation
C) steam distillation
D) none

7. London dispersion forces are the only forces present among the molecules of

A) water in liquid state
B) helium gaseous state at high temp
C) solid iodine
D) hydrogen chloride gas

8. When water freezes at 0 degree centigrade its density decreases due to

A) cubic structure of ice
B) empty spaces
C) change of bond lengths
D) liquid crystals are not used in

9. Liquid crystals are not used in

A) LCD
B) oscilloscopes
C) lightening discharges
D) chromatography

10. Liquid crystals have optical properties like that of solids which is due to the fact that

A) no molecular orientation
B) Ability to flow
C) isotropic in nature
D) some degree of orders