1.
Bauxite is an ore of
a) iron b)
zinc c)
tin d) aluminum
2.
Match the following ?
A. Glass 1. phosphorus
B. cement 2. clay
C. matches 3. silica
D. ink 4. carbon black
A B C D A B C D
a) 2 1 3 4 b) 3 2 1 4
c) 4 3 2 1 d) 3 1 4 2
3.
What is the dry ice ?
a) calcium
hydroxide b)
solid carbon dioxide
c) sodium
hydroxide d)
None of these
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4.
Sugar contains
a)
vitamins b) carbohydrates c)
proteins d) all these
5.
Which gas leaked in Bhopal gas tragedy ?
a) carbon monoxide b)
methyl isocynate
c) ethyl
cyanide d)
phenyl isocynate
6.
Which of the following is not a chemical change ?
a) burning of
coal b)
burning of paper
c) burning of
wood d) conversion of water into steam
7.
The chemical name of table salt is
a) calcium
chloride b) sodium
chlorite
c) sodium
hypochlorite d) sodium
chloride
8.
Chemical name of vitamin C is :
a) citric
acid b) ascorbic
acid c) oxalic acid d) nitric acid
9.
Bone is used as a fertilizer because it contains the
plant nutrient ?
a)
nitrogen b) phosphorus c)
sodium d) potassium
10.
Baking soda is :
a) sodium bicarbonate b)
sodium carbonate
c) sodium
chloride d)
sodium hydroxide
11.
Plaster of Paris is made from.
a)
bauxite b) gypsum c)
lime d) none of these
12.
Petroleum consists of a complex mixture of :
a)
carbonates b)
carbohydrates
c) hydrocarbons d)
None of these
13.
The most abundant elements is the earth's atmosphere is :
a)
oxygen b) hydrogen c) nitrogen d)
carbon dioxide.
14.
The three abundant element in the earth's crust are aluminum, oxygen and
silicon. The correct order of their abundance is :
a) silicon, aluminum,
oxygen
b) aluminum, silicon, oxygen.
c) silicon, oxygen, aluminum
d) oxygen, silicon,
aluminium.
15.
The chief constituent of gobar gas is :
a)
hydrogen b) methane c)
ethane d) carbon dioxide
16.
The conversion of a substance directly from solid to vapour state is
known as:
a) decomposition b)
vaporization
c)
ionization d)
sublimation
17.
Sea water is saltier than rain water because:
a) the
air around sea is salty.
b) sea
beds have salt deposits.
c) rivers wash away salts from the earth crust
and pour these into sea.
d) sea
animals are salt producing.
18.
Which of the following gases may cause acid rain in an industrial area?
a) CO2 b)
CO c) SO2 d)
CH4
19.
Which of the following substances is the most important constituent of
biogas?
a)
H2S b)
CO2 c) CH4 d)
H2
20.
Which of the following elements are the main constituents of bronze?
a) Nickel and
Chromium b) Lead and Tin
c) Copper and
Zink d)
Copper and Tin
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