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Quiz 3
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Q.1
Cement is usually a mixture of :
Calcium silicate and calcium aluminate
Calcium silicate and calcium ferrate
Calcium aluminate and calcium ferrate
Lime stone and silicon dioxide
Q.2
Limestone is a raw material used by which industry?
Aluminium
Fertilizers
Cement
Petrochemicals
Q.3
The element absorbed both in cation and anion form is
Sulphur
Nitrogen
Calcium
Phosphorus
Q.4
Find the odd one:
Marble
Chalk
Limestone
Slaked lime
Q.5
The chemical name of 'Hypo' commonly used in photography is
Sodium thiosulphate
Silver nitrate
Sodium nitrate
Silver iodide
Q.6
Oxygen has (+) oxidation number only in
OF
2
C
12
O
H
2
O (2)
N
2
O
Q.7
The mass number of a nucleus is
always less than its atomic number
the sum of the number of protons and neutrons present in the nucleus
always more than the atomic weight
a fraction
Q.8
The oil used in the froth floatation process is
coconut oil
olive oil
kerosene oil
pine oil
Q.9
Calcium salts used as fertilizer is :
Calcium Carbide
Calcium Carbonate
Calcium Cyanide
Calcium Sulphate
Q.10
Aluminium salt commonly used to stop bleeding is
Aluminium nitrate
Aluminium sulphate
Aluminium Chloride
Potash alum
Q.11
Sodium bicarbonate is commercially known as
Washing soda
Baking soda
Caustic soda
Soda lime
Q.12
Which of the following is the main nitrogenous waste in humans ?
Ammonia
Urea
Uric Acid
Ammonium Nitrate
Q.13
Cement containing excess amount of lime
Cracks during setting
Becomes more strong
Is slow setting
Is quick setting
Q.14
The chemical name of 'Plaster of Paris' commonly used for setting broken bones is
Calcium nitrate
Calcium sulphate
Calcium carbonate
Calcium chloride
Q.15
Interveinal necrotic spots on leaves appear due to
HF injury
SO
2
injury
NO
2
injury
O
3
injury
Q.16
The most electropositive elements among the following is
Na
Ca
K
Cs
Q.17
The method that cannot be used for removing permanent hardness of water is
adding sodium carbonate
distillation
adding caustic soda
boiling
Q.18
The oxidation number of nickel in K
4
[Ni(CN)
4
] is
Zero
+4
–4
+8
Q.19
The inexpensive and commonly used variety of glass is called soda glass. It is called so because
was used initially for making bottles of soda(carbonated drink)
is made using soda(sodium carbonate)
was initially used for storing sodium carbonate
is made using soda lime
Q.20
The number of waves in n x 10
th
Bohr's orbit are
n
2
n
n
-2
n
3
Q.21
The mass of one Avogadro number of helium atom is
1.00 gram
4.00 gram
8.00 gram
4 x 6.02 x 10
23
gram
Q.22
In silvery paints, the main constituent present is
Aluminium powder
Silver powder
Lead powder
White lead
Q.23
Which among the following elements is found in maximum percentage in the human body ?
Carbon
Hydrogen
Nitrozen
Oxygen
Q.24
Quartz is a crystalline form of
Alumina
Glass
Silica
Limestone
Q.25
Commercially, sodium bicarbonate is known as
Washing soda
Baking soda
Bleaching powder
Soda ash
Q.26
The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?
3 billion years
100 years
0.01 minute
13 days
Q.27
How many neutrons are there in
92
U
238
atom ?
92
238
146
330
Q.28
The number of neutrons present in an element having mass number 226 and atomic number 88 is :
88
138
314
50
Q.29
The gas used in the manufacture of vanaspati from vegetable oil is
hydrogen
oxygen
nitrogen
carbon dioxide
Q.30
The items amenable to detection by soft x-rays are
contrabands
lead in bullets
narcotics
genuine coins from counterfeit coins
Q.31
Urea is a
Sodium fertilizer
Phosphatic fertilizer
Nitrogenous fertilizer
Potassium fertilizer
Q.32
Who modified Bohr's theory by introducing elliptical orbits for electron path?
Hund
Thomson
Rutherford
Sommerfeld
Q.33
The ionic radii of N
3-
, O
2-
, F
-
and Na
+
follows the order
N
3-
> O
2-
> F
-
> Na
+
N
3-
> Na
+
> O
2-
> F
-
Na
+
> O
2-
> N
3-
> F
-
O
2-
> F
-
> Na
+
> N
3-
Q.34
The material which can be deformed permanently by heat and pressure is called a
thermoplastic
thermoset
chemical compound
polymer
Q.35
The graphite rods in the nuclear reactor
react with U to release energy
produce neutrons
undergo combustion which triggers the nuclear fission
convert fast moving neutrons into thermal neutrons
Q.36
Chemical name of vinegar is
Acetone
Acetic acid
Formaldehyde
Ethanol
Q.37
The main use of salt in the diet is to
make the taste of food better
produce in small amounts the hydrochloric acid required for the digestion of food
ease the process of cooking
increase the solubility of food particles in water
Q.38
The most common cause of pollution of air is
Carbon dioxide
Carbon monoxide
Sulphur dioxide
Smoke
Q.39
Acid rain is caused by
SO
2
and particulates
NO
2
and particulates
CO
2
and CFCs
SO
2
and NO
2
Q.40
The sewage obtained from water closets and urinals is known as
Sanitary waste
Industrial waste
Garbage
Sullage
Q.41
The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
carbon
hydrogen
oxygen
nitrogen
Q.42
The hardest form of carbon is
coke
graphite
diamond
charcoal
Q.43
The isomerism which exists between CH
3
CHCI
2
and CH
2
CI. CH
2
CI is
chain isomerism
functional group isomerism
positional isomerism
metamerism
Q.44
The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?
1/6
1/3
1/8
1/4
Q.45
The most commonly used bleaching agent is
alcohol
carbon dioxide
chlorine
sodium chlorine
Q.46
The iron ore magnetite consists of
Fe
2
O
3
Fe
3
OH
4
FeCO
3
3Fe
2
O
3
.3H
2
O
Q.47
The most important ore of aluminium is
bauxite
magnetite
haematite
monazite
Q.48
The organic reaction represented by equation CH
3
- CH = O + H
2
NOH gives CH
3
- CH - NH + H
2
O is an example of
an addition reaction
a condensation reaction
an oxidation reaction
an elimination reaction
Q.49
The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
4
5
2
zero
Q.50
The major constituent of air is
carbon dioxide
nitrogen
oxygen
hydrogen
0 h : 0 m : 1 s
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