1. Which one of the following
when dissolved in H₂ O gives hissing sound?
(a)
Limestone
(b)
Slacked lie
(c)
Sodalime
(d)
Quicklime
2. Match the following:
List I list II
A.
Vodka 1. Apples
B.
Brandy 2. Potatoes
C.
Cidar 3. Barley
D.
Whisky 4. Grapes
Codes
A B
C D
(a)
2 4
1 3
(b)
4
3 2 1
(c)
2
1 3 4
(d)
1
4 2 3
3. What is the role of positive catalyst in a chemical reaction?
(a)
It increases the rate of reaction
(b)
It decreases the rate of reaction
(c)
It increases the yield of the products
(d)
It provides better purity of the products
4. Food cans are coated with the but not with zinc because
(a)
Zinc is costlier than tin
(b)
Zinc has a higher melting point than tin
(c)
Zinc is more reactive than tin
(d)
Tin is more reactive than zinc
5. Nail polish remover contains
(a)
Acetone
(b)
Bencene
(c)
Petroleum ether
(d)
Acetic and
6.
Which allotropy of carbon is in rigid three- dimensional structure?
(a)
Graphite
(b)
Fullerene
(c)
Diamond
(d)
Carbon black
7. The quality of diesel oil for use in
diesel engines is determined by the
(a)
Composition of the oil
(b)
Octane
number
(c)
Cetane number
(d)
Amount of additives added
8. Which one among the following
metals is used in fireworks to make a brilliant white light?
(a)
Sodium
(b)
Magnesium
(c)
Aluminium
(d)
Silver
9. Oxygen and ozone are
(a)
Allotropes
(b)
Isotopes
(c)
Isomers
(d)
Isobars
10. Which of the following is not
a natural polymer?
(a)
Wool
(b)
Silk
(c)
Cotton
(d)
Teflon
Answer:
1.
A
2.
A
3.
C
4.
C
5.
A
6.
C
7.
C
8.
B
9.
A
10.
D
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