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Chemistry MCQs for 11 Class / Chemistry Quiz
- it is based on the principle that boiling points are lowered at lower pressure
a.sublimatiom
B.crystallization
C.vaccum distilled
D.heat of vaporization
Vacuum distillation - The Force of attraction between particles of a liquid are
A.adhesive
B.cohesive
C.london forces
D.coulombs force
Cohesive - surface tension are viscosity are _ dependent functions
A.volume
B.pressure
C.temperature
D.n.o.t
Temperature - at room temperature vapor pressure of water and ethene are
A.dlifferent
B.same
C.zero
D.n.o.t
Different - with an increase in pressure the melting point of these solids increases which
A.expand on cooling
B.contract on heating
C.expand on melting
D.contract on melting
Expand on melting - non-wetting liquids form_ meniscus
A.convex
B.concave
C. Plane
D.a.o.t
Convex - Free-falling drops of liquid is spherical due to
A.h bonding
B.viscosity
C.surface tension
D.vapour surface
Surface tension - liquids are used in hydraulic brake systems because of
A.low compression
B.slow diffusion
C.high vapor pressure
D.vapour pressure
Low compression - which of the following is less viscous
A .ethene alcohol
B.water
C.ether
D.n.o.t
Ether - mercury rises up in the thermometer due to
A.capillary action
B.diffusion
C.contraction
D.n.o.t
N.o.t - evaporation is a process
A.surface
B.cooling
C.both a and b
D.n.o.t
Both a and b - food cools rapidly in a pressure cooker because of the boiling temperature
A.higher
B.lower
C.constat
D.n.o.t
Higher - Which one following has the highest viscosity
A.water
B.sulphuric acid
C.ethanol
D.glycerin
Glycerin - surface tension is the highest
A. Hg
B.water
C.ethanol
D.n .o.t
Hg - A drop of ink is spread out in water is an example of
A.diffusion
B.effusion
C.capillary action
D.surface tension
Diffusion - with increases in temperature the vapor pressure
A.increases
B.decreases
C.remains same
D.n.o.t
N.o.t - Which is not a property of liquid
A.diffusion
B.viscosity
C.surface tension
D.ductility
Ductility - the highest temperature at which a substance can exist as a liquid is called
A.critical temperature
B.zero temperature
C.absolute temperature
D.n.o.t
Critical temperature - a chemical substance that readily evaporates and readily diffuses at ordinary temperature and pressure conditions is
A.inflammable
B.inert
C.volatile
D.corrosive
Volatile - At 50 degree Celsius water has viscosity
A.1 centipoise
B.1.005 centipoise
C.1.78 centipoise
D.0.55 centipoise
0.55 centipoise