General Chemistry

Only available for you

16 Sodium bicarbonate is commercially known as

A
Washing soda
B
Baking soda
C
Caustic soda
D
Soda lime

17 Gobar gas contains mainly :

A
methane
B
ethylene
C
propylene
D
acetylene

18 Brass is an alloy of :

A
Lead and tin
B
Zinc and copper
C
Antimony, tin and lead
D
Zinc, tin and copper

19 PVC is obtained by the polymerisation of :

A
Propane
B
Vinyl chloride
C
Styrene
D
Acetylene

20 The chemical used in embalming biological materials is :

A
formaldehyde in water
B
formaldehyde in methanol
C
ethylene glycol
D
gaseous formaldehyde

21 Which of the following alloy is used in making magnet ?

A
Duralumin
B
Stainless steel
C
Elniko
D
Magnalium

22 The gas which is mainly responsible for the green house effect is:

A
Ozone
B
Oxygen
C
Carbon dioxide
D
Carbon monoxide

23 Which of the following metals form an amalgam with other metals ?

A
Lead
B
Tin
C
Zinc
D
Mercury

24 Which of the following is the petroleum wax ?

A
Bees wax
B
Carnauba wax
C
Paraffin wax
D
Jojoba wax

25 Metal are good conductors, because

A
they contain free electrons
B
the molecules in them are very close to each other
C
the molecules in them collide very freely
D
they contain reflecting surface

26 The polymer used in making plastic crockery is :

A
Decron
B
Nylon
C
Bakelite
D
Melamine

27 Water can be separated from alcohol water mixture by which of the following:

A
decantation
B
evaporation
C
distillation
D
sublimation

28 By-product obtained by soapindustry is :

A
Caustic soda
B
Glycerol
C
Naphthalene
D
Caustic potash

29 A polymeric substance used to make parachute is :

A
Rayon
B
Viscose
C
Cotton
D
Terylene

30 Bhopal gas tragedy is associated with leakage of :

A
carbon dioxide
B
nitrogen dioxide
C
sulphur dioxide
D
methyl isocyanate