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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
During the manufacturing process of cement the temperature of the decomposition zone goes up to:
Choose an answer
600°C
800°C
1000°C
1200°C
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Question # 2
Which one of the following statements about melting point of metals is true?
Choose an answer
sodium has a lower melting point than potassium
sodium has a higher melting point than magnesium
potassium has a higher melting point rubidium
lithium has a lower melting point than sodium
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Question # 3
Benzene has pi electron
Choose an answer
2
4
6
8
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Question # 4
Chemical like Al
2
(SO
4
) or alum are used in purification of water druing step:
Choose an answer
aeration
coagulation
chlorination
treatment
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Question # 5
SiO
2
is an example of:
Choose an answer
metallic crystals
lonic crystals
a crystal whose structure depending upon the temperature
covalent crystals
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Question # 6
The kinetic energy of 4 moles of nitrogen gas at 127°C is? cals.(R = 2 cal mol
-1
K
-1
)
Choose an answer
4400
3200
4800
1524
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Question # 7
Potable water is considered to be:
Choose an answer
safe for human consumption
the ground water
the Surface water
now water is due to the salt of:
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Question # 8
The unit of R depends on
Choose an answer
Mole
Pressure volume
Temperature
None of these
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Question # 9
Deep sea divers take oxygen with:
Choose an answer
A heavy gas
A lighter gas
An inert gas
All of above
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Question # 10
The boding which covalent molecules containing hydrogen and one of the small electronegative element such as O, For Mis called:
Choose an answer
ionic bonding
bridge bonding
H-bonding
metalic bonding
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Question # 11
Phenol is colourless, crystalline and solid
Choose an answer
Hygroscopie
Deliquescent
Moistening
Odourless
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Question # 12
Toluene can be oxidized to benzoic acid by
Choose an answer
KMnO
4
(alk)
K
2
Cr
2
O
7
(acidic)
Both
None
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Question # 13
Phenol is a weak acid. The correct order of acid strength of carboxylic acid, phenol and alcohol is
Choose an answer
Carboxylic acid > phenol > alcohol
Carboxylic acid > alcohol > phenol
Phenol > carboxylic acid > alcohol
Alcohol > phenol > carboxylic acid
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Question # 14
Half life period of a first order reaction is independent of:
Choose an answer
Presence of catalyst.
Conditions of temperature
Initial concentration of the compound
All of above
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Question # 15
Preparation of ethylbenzene by the reaction of bromobenzene, ethylbromide and sodium is called
Choose an answer
Wurtz reaction
Fitting reaction
Wurtz fitting reaction
None of these
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Question # 16
In the ground state of an atom, the electron is present:
Choose an answer
In the nucleus.
In the second shell.
Nearest to the nucleus.
farthest from the nucleus.
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Question # 17
An electron with n = 3 , l = 2 will be in the sub-shell
Choose an answer
3p
3d
3f
3s
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Question # 18
NaBH
4
and LialH
4
are
Choose an answer
Ionic hydrides
Covalent hydrides
Interposal hydrides
Complex hydrides
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Question # 19
A solution can be
Choose an answer
Dilute and concentrated
Saturated and dilute
Saturated and unsaturated
Supersaturated and saturated
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Question # 20
At room temperature, the mole fraction of a solution in 0.25 and the vapour pressure of the solvent is 0.80 atm. Then the lowering of vapour pressure is
Choose an answer
0.75
0.512
0.80
0.0512
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Question # 21
Cellulose does:
Choose an answer
Satisfy human appetite
Stimulates intestinal peristalsis
Gives fibre and bulk to the food
All of these
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Question # 22
When 6d orbital is complete, the entering electron goes into:
Choose an answer
7f.
7s.
7p.
7d.
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