GENERAL SCIENCE
CHEMISTRY
31.
What type of mixture is smoke?
a)
Pressure in the bottle
b)
Compression from the bottle
c)
Diffusion
d)
Osmosis
32.
A compound that is a white solid which absorbs
water vapour from the air is
a)
Sodium nitrate
b)
Calcium chloride
c)
Sodium carbonate
d)
Calcium sulphate
33.
What are the elements which are liquids at room
temperature and standard pressure?
I.
Helium
II.
mercury
III.
chlorine
IV.
Bromine
Select the
correct answer using the codes given below.
a)
2 and 3
b)
2,3 and 4
c)
2 and 4
d)
1 and 3
34.
Which lament forms the highest number of
compounds in the periodic table?
a)
Carbon
b)
Oxygen
c)
Silicon
d)
Sulphur
35.
Dirty cloths containing grease and oil stains
are cleaned by adding detergents to water. Stains are removed because
detergent.
a)
Reduces drastically the surface tension between
water and oil.
b)
Increases the surface tension between water and
oil.
c)
Increases the viscosity of water & oil
d)
Decreases the viscosity in detergent mixed
water.
36.
Motion of an oscillate in liquids column in a U-tube
is
a)
Periodic but not simple harmonic
b)
Non periodic
c)
Simple harmonic and time period is independent
of the density of the liquid
d)
Simple harmonic and time period depends on the
density of the liquid.
37.
Pressure of a gas increase of its temperature
because at higher temperature
a)
Gas molecules repel each other more
b)
Potential energy of the gas molecules is higher
c)
Kinetic energies of the gas molecules are higher
d)
Gas molecules attract each other more.
38.
The presence of sulphur in gunpowder.
a)
Decreases the ignition temperature
b)
increases the final temperature
c)
Increases explosiveness of the gunpowder
d)
Makes the powder smokeless.
39.
Calcium ammonium nitrate (CAN) is a popular
nitrogen fertilizer because it is
a)
Slow supplier of nitrogen
b)
Having more percentage of nitrogen in it
c)
Fixing the nitrogen in the soil
d)
Capable of making the soil acidic
40.
Chromium oxide is used as an ingredient in
paints to obtain
a)
Green colour
b)
Blue colour
c)
Red colour
d)
Violet colour
ANSWERS
31.D
32.D
33.C
34.A
35.A
36.D
37.C
38.C
39.B
40.A