1.Carbon, diamond and graphite are together called
isomers
allotropes
isomorphs
isotopes
ANSWER : : allotropes
2.From which mineral is radium obtained ?
Limestone
Haematite
Pitchblende
Rutile
ANSWER : : Pitchblende
3.Tetraethyl lead is used as
mosquito repellent
pain killer
fire extinguisher
petrol additive
ANSWER : : petrol additive
4.Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
nitrates
zeolites
sulphonates
None of these
ANSWER : : zeolites
5.Which of the following metals remains in liquid form under normal conditions ?
Uranium
Radium
Zinc
Mercury
ANSWER : : Mercury
6.Which of the following is not a compounds ?
Silica
Red lead
Slaked lime
Black lead
ANSWER : : Black lead
7.Diamond is harder than graphite because of
difference of layers of atom
tetrahedral structrue of diamond
difference of crystalline structures
None of these
ANSWER : : difference of crystalline structures
8.Potassium nitrate is used in
salt
glass
fertiliser
medicine
ANSWER : : medicine
9.Which of the following is the lightest gas ?
Nitrogen
Hydrogen
Ammonia
Carbon dioxide
ANSWER : : Hydrogen
10.Which of the following statements about dry ice are correct ? 1. It is a useful refrigerant. 2. On heating, it turns into a liquid. 3. It has acidic properties. 4. It causes burns when pressed against the skin.
1 and 3
1, 2 and 3
2 and 4
1, 3 and 4
ANSWER : and 3ns: 1 and 3
11.Bromine is
a colourless gas insoluble in water
a highly inflammable gas
a black solid
a red liquid
ANSWER : : a red liquid
12.Which of the following is a non-ferrous metal ?
Aluminium
Iron
Nickel
Cobalt
ANSWER : uminiumns: Aluminium
13.Consider the following statements about aluminium : 1. It is the third most abundant element in the earths crust. 2. It is uses to make over-head electric transmission lines. 3. Aluminium vessels cannot be used for making alkali solutions.of these statements, the correct ones are
1 and 2
2 and 3
1 and 3
1, 2 and 3
14.Marsh gas is
hydrogen
nitrogen
methane
ethane
ANSWER : : methane
15.Which of the following gases is used as an illuminant in lamps used by hawkers ?
Methane
Ethylene
Acetylene
Hydrogen
ANSWER : : Acetylene
16.Which of the following used as a lubricant ?
Graphite
Silica
Diamond
Iron oxide
ANSWER : aphitens: Graphite
17.The average salinity of sea water is
2%
2.5%
3%
3.5%
ANSWER : : 3.5%
19.Consider the following statements regarding graphite : 1. It is an allotrope of carbon. 2. It is a good conductor of heat and electricity. 3. It can be artificially produced.Of these statements,
1, 2 and 3 are correct.
1 and 2 are correct.
1 and 3 are corrcet
2 and 3 are correct.
ANSWER : 2 and 3 are correct.ns: 1, 2 and 3 are correct.
20.An element that does not occur in nature but can be produced artificially is
thorium
radium
plutonium
uranium
ANSWER : : plutonium
21.Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products ?
Television
Tubelight
Cooking gas
Refrigerator
ANSWER : : Refrigerator
22.Soda water contains
nitrous acid
carbonic acid
carbon dioxide
sulphuric acid
ANSWER : : carbon dioxide
23.Which of the following alloys is used for making magnets ?
duralumin
Stainless steel
Alnico
Magnalium
ANSWER : : Alnico
isomers
allotropes
isomorphs
isotopes
ANSWER : : allotropes
2.From which mineral is radium obtained ?
Limestone
Haematite
Pitchblende
Rutile
ANSWER : : Pitchblende
3.Tetraethyl lead is used as
mosquito repellent
pain killer
fire extinguisher
petrol additive
ANSWER : : petrol additive
4.Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
nitrates
zeolites
sulphonates
None of these
ANSWER : : zeolites
5.Which of the following metals remains in liquid form under normal conditions ?
Uranium
Radium
Zinc
Mercury
ANSWER : : Mercury
6.Which of the following is not a compounds ?
Silica
Red lead
Slaked lime
Black lead
ANSWER : : Black lead
7.Diamond is harder than graphite because of
difference of layers of atom
tetrahedral structrue of diamond
difference of crystalline structures
None of these
ANSWER : : difference of crystalline structures
8.Potassium nitrate is used in
salt
glass
fertiliser
medicine
ANSWER : : medicine
9.Which of the following is the lightest gas ?
Nitrogen
Hydrogen
Ammonia
Carbon dioxide
ANSWER : : Hydrogen
10.Which of the following statements about dry ice are correct ? 1. It is a useful refrigerant. 2. On heating, it turns into a liquid. 3. It has acidic properties. 4. It causes burns when pressed against the skin.
1 and 3
1, 2 and 3
2 and 4
1, 3 and 4
ANSWER : and 3ns: 1 and 3
11.Bromine is
a colourless gas insoluble in water
a highly inflammable gas
a black solid
a red liquid
ANSWER : : a red liquid
12.Which of the following is a non-ferrous metal ?
Aluminium
Iron
Nickel
Cobalt
ANSWER : uminiumns: Aluminium
13.Consider the following statements about aluminium : 1. It is the third most abundant element in the earths crust. 2. It is uses to make over-head electric transmission lines. 3. Aluminium vessels cannot be used for making alkali solutions.of these statements, the correct ones are
1 and 2
2 and 3
1 and 3
1, 2 and 3
14.Marsh gas is
hydrogen
nitrogen
methane
ethane
ANSWER : : methane
15.Which of the following gases is used as an illuminant in lamps used by hawkers ?
Methane
Ethylene
Acetylene
Hydrogen
ANSWER : : Acetylene
16.Which of the following used as a lubricant ?
Graphite
Silica
Diamond
Iron oxide
ANSWER : aphitens: Graphite
17.The average salinity of sea water is
2%
2.5%
3%
3.5%
ANSWER : : 3.5%
19.Consider the following statements regarding graphite : 1. It is an allotrope of carbon. 2. It is a good conductor of heat and electricity. 3. It can be artificially produced.Of these statements,
1, 2 and 3 are correct.
1 and 2 are correct.
1 and 3 are corrcet
2 and 3 are correct.
ANSWER : 2 and 3 are correct.ns: 1, 2 and 3 are correct.
20.An element that does not occur in nature but can be produced artificially is
thorium
radium
plutonium
uranium
ANSWER : : plutonium
21.Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products ?
Television
Tubelight
Cooking gas
Refrigerator
ANSWER : : Refrigerator
22.Soda water contains
nitrous acid
carbonic acid
carbon dioxide
sulphuric acid
ANSWER : : carbon dioxide
23.Which of the following alloys is used for making magnets ?
duralumin
Stainless steel
Alnico
Magnalium
ANSWER : : Alnico
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