(a)
Melting point
of ice is lowered with increase in pressure
(b)
Melting point of ice increases with increase in
pressure
(c)
Melting point of ice remains unchanged with
increase in pressure
(d)
Melting point of ice is 0˚C
2. Aqua-regia
used by alchemists to separate silver and gold is a mixture of
(a)
Hydrochloric and (concentrated) and nitric acid
(concentrated)
(b)
Hydrochloric acid (concentrated) and sulphuric
acid (concentrated)
(c)
Nitric acid (concentrated ) and sulphuric acid
(concentrated)
(d)
Hydrochloric acid (dilute) and sulphuric and
(dilute)
3. Consider the following statements.
1.
Marble is a constituent of tooth paste.
2.
Gypsum is used for the manufacture of ammonium
sulphate.
Which of the statements given above is/ are correct?
(a)
Only 1
(b)
Only 2
(c)
Both 1 and 2
(d)
Neither 1 nor 2
4. Consider the following statements.
1.
Glycerol
is used in explosives.
2.
Detergents are made from hydrocarbons obtained
from coal or petroleum.
3.
Sodium perborate is a mild bleaching agent.
4.
Methanol I sued for making synthetic fibres.
Which of the statements given above are correct?
(a)
1,
2, 3 and 4
(b)
1, 2 and
3
(c)
2, 3 and 4
(d)
1 and 4
5. A pale blue gas with a fish-like odour
restores the colour of a blackened lead painting. The gas is also used as
rocket fuel. It is
(a)
Oxygen
(b)
Ammonia
(c)
Sulphur dioxide
(d)
Ozone
6. Calcium carbonate is naturally available as limestone and can also
be synthesized from quicklime. It is seen that the compositions of the elements
in both the natural and synthetic calcium carbonate are same. The validity of
which one among the following laws is confirmed
by this observation?
(a)
Law of conservation of mass
(b)
Law of definite proportion
(c)
Law of multiple proportion
(d)
Avogadro’s law
7. The Bleaching action of
chlorine occurs in the presence of
(a)
Moisture
(b)
Sunlight
(c)
pure oxygen
(d)
Pure sulphur dioxide
8. Which one among the following statements regarding the properties of
mixtures and compounds is not correct?
(a)
A mixture shows the properties of its
constituents but the properties of a compound are entirely different from its
constituents
(b)
A mixture may be homogeneous or heterogeneous
but a compound is a homogeneous substance
(c)
The constituents of a mixture can be separated
by physical methods but those of a compound cannot be separated by physical
methods
(d)
Energy is either absorbed or evolved during the
preparation of a mixture but not in the
preparation of a compound
9. Shallow lake with rich
organic products are called
(a)
Heterotrophic
(b)
Eutrophic
(c)
Mestrophic
(d)
Oligotrophic
10.
An oxidizing agent is a substance which
(a)
Increases the oxidation number of an element is
a given substance
(b)
Decreases the oxidation number of an element is
a given substance
(c)
Is oxidized itself in an oxidation reduction
reaction
(d)
Loses electrons in an oxidation reduction
reaction
Answer:
1.
A
2.
A
3.
C
4.
B
5.
B
6.
B
7.
A
8.
D
9.
B
10.
A
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