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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
Li resembles with Mg, because
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the ratio of their charge to size is nearly the same
both have nearly same size
both are metallic in nature
both are found together in nature
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Question # 2
The deviation of a gas from ideal behaviour is maximum at
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-10°C and 5.0 atm
100°C and 2.0 atm
-10°C and 2.0 atm
0°C and 2.0 atm
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Question # 3
The nature of crystals formed due to London forces of interaction are
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molecular
metallic
ionic
covalent
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Question # 4
The development of disagreeable odour in fats or oil is called
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fragrance
perfume
rancidity
smell
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Question # 5
When wine is put in air, it becomes sour due to
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Oxidation of C2H5OH
Formation of C2H5NH2
Reduction of C2H5OH
Dissolution of CO2
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Question # 6
Which of the following is the repeating monomeric unit in cellulose?
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sucrose
maltose
cellobiose
glucose
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Question # 7
Ethane when completely halogenated in excess of chiorine can form
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Hexachloroethane
Dichloroethane
Pentachloroethane
1.1.2.2-terachloroethane
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Question # 8
Butyric acid was named from butyrum means:
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Red out
Vinegar
Butter
Milk
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Question # 9
In nucleophilie substitution bimolecular reaction the order of reaction with respect to substrate
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2 order
3 order
1st order
Zero order
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Question # 10
The protein component of enzyme ls called
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apoenzyme
proenzyme
holoenyme
co-enzyme
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Question # 11
Which process of pulp making is mostly used in Pakistan?
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Kraft process
Sulphite process
Neutral sulphite semi chemical process (NSSC)
All of these
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Question # 12
On heating glycerol with conc. Sulphuric acid a compound with unpleasant odour is obtained. The compound is
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Methyl alcohol
Formic acid
Prop-2-enal
Glycerol sulphate
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Question # 13
Which of these reactions is shown by buranone, CH
3
COCH
2
CH
3
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On warming with acidified potassium dichromative (IV) the solution turns green
On heating with Fehling's reagent a red precipitate is formed
With 2,4-dinitrophenlhydrazine reagent an orange precipitate is formed
With hydrogen cyanide an aldehyde is formed
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Question # 14
Coupling of Pb with its Pb
++
/Pb = -0.13 V and Ag with Ag
+
/ Ag = +0.80 V, the cell reaction
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Question # 15
The relative lowering of vapour pressure is equal to the mole fraction of the solute is statement of
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Rault law
Henry law
Dalton law
Grahms law
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Question # 16
Which is the formula of tetra-ammine chloro-nitro platinum (IV) sulphate
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[Pt(NH
3
)
4
(NO
2
)] SO
4
[Pt NO
2
CI(NH
3
)
4
] SO
4
[Pt CI(NO
2
) (NH
3
)
4
] SO
4
[Pt (NH
3
)
4
(NO
2
) CI] SO
4
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Question # 17
Which of the following does not exhibit the periodicity in properties of the elements?
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Ionisation energy
N/P ratio
Electronegativity
Atomic radius
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Question # 18
Choose an answer
0.60
1.67
0.66
2.6
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Question # 19
If liquids A and B form an ideal solution
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The enthalpy of mixing is zero
The entropy of mixing is zero
The free energy of mixing is zero
The free energy as well as the entropy of mixing are each zero
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Question # 20
Synthetic rubber is made by polymerization of
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Chloroform
Acetylene
Divinlacetylene
Butene
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Question # 21
Alkanes may be prepared by the reaction of alkyl halides with
Choose an answer
Alcohol
Carboxylic acid
Grignard reagents
None of these
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Question # 22
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Adding H
2
O and H
+
ions
Adding OH
-
ions
Adding O
2
molecules
Adding O atoms
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