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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
The Sl mechanism for the hydrolysis of an alkyl halide to an alcohol involves the formation of
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Carbocation
Carbanion
Pentavalent carbon in the transition state
Free radical
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Question # 2
Which is biopolymer?
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Plastic
Rubber
synthetic fiber
Lipid
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Question # 3
Which of the following equation is for idea gas:
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PV = dRT
PR = nTP
PM = nRT
PV = nRT
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Question # 4
Which pair of elements have bonds of the same type between their molecules in the solid state?
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phosphorous and nitrogen
sulphur and magnesium
carbon and sodium
hydrogen and sodium
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Question # 5
CFCs destroy ozone layer, How many ozone molecule a chlorine free radical can destroy:
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50,000
100,00
20,000
10,000
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Question # 6
In diamond, which hybridization is there?
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sp2
dsp2
sp3
sp
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Question # 7
An organic compound made from oxidation of ethanol is
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Formic acid
Acetic acid
Malonic acid
Citric acid
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Question # 8
Density of a gas increases by
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increasing value of R
decreasing value of R
increasing T
decreasing T
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Question # 9
Which is the chemical formula of calcium super phosphate:
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CaH
2
PO
4
CaHPO
4
Ca(H
2
PO
4
)
2
none of above
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Question # 10
Which of the folowing compound is expected to be colored
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Na2SO4
ZnCl2
MgF
2
CuF
2
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Question # 11
Polar ice caps and glaciers consists total earth water:
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1%
2%
3%
4%
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Question # 12
Which is independent of temperature
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Molarity
Molality
Normality
Mole fraction
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Question # 13
n + l value for 4f will
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2
5
7
9
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Question # 14
1, 3-Dibromopropane reacts with metallic zinc to form
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Propene
Propane
Cyclopropane
Hexane
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Question # 15
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Question # 16
In the atomic emission spectrum the lines which appear bright, appear dark in absorption spectrum because
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The radiations emitted in emission spectrum are absorbed in absorption spectrum
Atomic emission spectrum is continuous
Atomic absorption spectrum is continuous
Distance between the lines increases
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Question # 17
Which one gives acidic reactions?
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CH
3
----C
≡C-------CH
3
CH
3
-----CH
2
-----HC=CH----CH
2
CH
3
----CH=CH
2
CH
3
-----C
≡CH
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Question # 18
I a chemical reaction equilibrium is said to have been established when :
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Rate of opposing reactions are equal.
Rate constants of opposing reactions are equal.
Opposing reactions stop.
Concentration of reactants and products are equal
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Question # 19
Which of the following reagents is used to distinguish between methanoic acid and ethanoic acid?
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Amm. silver nitrate solution
Neutral ferric chloride
Sodium hydroxide solution
Sodium carbonate solution
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Question # 20
Which is the formula of tetra-ammine chloronitro platinum (VI) sulphate?
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[Pt(NH
3
)
4
(NO
2
)]SO
4
[PtNO
2
Cl(NH
3
)
4
]SO
4
[PtCl(NO
2
)(NH
3
)
4
]SO
4
[Pt(NH
3
)
4
(NO
2
)Cl]SO
4
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Question # 21
Tertiary alkyl halides are practically inert to substitution by S
N
2 mechanism because of
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Onsolubility
Instability
Inductive effect
Steric hindrance
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Question # 22
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450°C
250°C
850°C
1000°C
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