1. Silver
ware turns black after a period of time due to formation of
(a)
Nitrate coating on silver
(b)
Sulphide coating on silver
(c)
Chloride coating on silver
(d)
Oxide coating on silver
2.
Which one of the following correctly defines the state of glass?
(a)
Crystalline glass
(b)
Super cooled liquid
(c)
Condensed gas
(d)
Liquid crystal
3.
Which one of the following correctly defines the state of glass?
(a)
Magnesium oxide
(b)
Magnesium carbonate
(c)
Magnesium chloride
(d)
Magnesium sulphate
4.
Which one among the following methods is not effective in removing arsenic from
contaminated ground water?
(a)
Boiling
(b)
Reverse osmosis
(c)
Ion exchange
(d)
Coagulation absorption
5.
Which one of the following is also called stranger gas?
(a)
Argon
(b)
Neon
(c)
Xenon
(d)
Nitrous oxide
6. Which
one of the following is a major constituent of biogas?
(a)
Carbon dioxide
(b)
Methane
(c)
Hydrogen
(d)
Nitrogen dioxide
7.
Match the following:
List I list
II
(Substance added)
(Colour imparted to glass)
A.
Chromium (III) oxide 1. Red
B.
Cobalt (II) oxide 2. Violet
C.
Cuprous oxide 3. Green
D.
Maganese oxide 4. Blue
Codes
A B
C D
(a)
2
1 4 3
(b)
3
4 1 2
(c)
3 1 4
2
(d)
2
4 1 3
8. For which one of the
following is the density maximum?
(a)
Chloroform
(b)
Water
(c)
Benzene
(d)
Ice
9. What is a mixture of potassium nitrate, powdered charcoal and
sulphur called?
(a)
Glass
(b)
Cement called?
(c)
Paint
(d)
Gun powder
10. Which one of the following is the softest?
(a)
Sodium
(b)
Aluminium
(c)
Iron
(d)
Lithium
Answer:
1.
B
2.
B
3.
D
4.
A
5.
C
6.
B
7.
B
8.
A
9.
D
10.
A
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