1.The gas formed when potassium permanganate is heated:
a)Nittrogen
b)Oxegen
c)Hydrogen
d)Ammonia
2.The pungent smell emitted while scraching the box:
a)oxygen
b)Hydrogen sulphide
c)Methane
d)Helium
3.The gas formed in sun as the result of nuclear fusion:
a)Oxygen
b)Carbon dioxide
c)methane
d)Helium
4.what is the color of ozone:
a)yellow
b)orange
c)blue
d)red
5.Which metal is called 'white gold'?
a)mercury
b)silver
c)iron sulphide
d)Platinum
6.Which metal has the symbol 'hg':
a)hydrogen
b)iron
c)aluminium
d)mercury
7.which of the following metal is used to make the nib of fountain pens:
a)silver
b)aluminium
c)lead
d)iridium
8.the name 'surum' is related to the metal:
a)tungsten
b)osmium
c)gold
d)iridium
9.The substances added to ore to remove impurities is called:
a)Gangue
b)flux
c)Aqua regia
d)alloy
10.Which is known as 'the metal of hope':
a)Titanium
b)uranium
c)silver
d)plantinum
11.Cassiterite is the ore f:
a)lead
b)gold
c)copper
d)tin
12.Pure gold is_______carat:
a)100
b)91.6
c)22
d)24
13.The main constituent of electrum:
a)nickel
b)gold
c)iron
d)aluminium
14.Which variety of coal contains the largest amount of carbon:
a)Graphite
b)anthrasite
c)lignite
d)Lamp Black
15.Which is known as 'Caustic lotion'?
a)Silver nitrate
b)Triplumbic tetroxide
c)ferric sulphate
d)ferric oxide
1.b 2.d 3.d 4.c 5.d 6.d 7.d 8.c 9.b 10.b 11.d 12.d 13.b 14.b 15.a
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