51.
The compound which contains both ionic and
covalent bonds is
a)
KCN
b)
CO
c)
CH₄
d)
H₂
52.
Which of the following is not a carboxylic acid?
a)
Picric acid
b)
Tartaric acid
c)
Formic acid
d)
Citric acid
53.
The process of decomposing organic waste in the
presence of air is termed as
a)
Pulverizing
b)
Incineration
c)
Salvaging
d)
Oxidation
54.
Nitrogen dioxide present in ambient air can be
estimated by
a)
High performance liquids chromatography
b)
Chemi – luminescence
c)
Flame photometry
d)
Atomic absorption spectrophotometry
55.
An example of heterocyclic compound is
a)
Benzence
b)
Anthracenne
c)
Naphthalene
d)
Furan
56.
In electro – refining, the pure metal is
deposited on
a)
Cathode
b)
anode
c)
Vessel
d)
Electrolyte
57.
Yeast is an important source of
a)
Invertase
b)
Vitamin – C
c)
Protein
d)
Vitamin –B
58.
Gas thermometers are more sensitive than the
liquid thermometers because the gases.
a)
are
lighter
b)
Have low specific heat
c)
Have high specific heat
d)
Have large coefficient of expansion
59.
Heating of a ore below its melting point in the
absence of air is known as
a)
Calcinations
b)
Roasting
c)
Smelting
d)
Refining
60.
The most electronegative element among the
following is
a)
Sodium
b)
Chlorine
c)
Oxygen
d)
Fluorine
ANSWERS
51.A
52.A
53.B
54.C
55.D
56.A
57.D
58.D
59.B
60.C