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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
Nitrogen percentage in atmosphere is:
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76%
77%
78%
79%
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Question # 2
Components of environment is (in km) around the earth:
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10 km
100 km
1000 km
1500 km
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Question # 3
According to Boyle's law at constant temperature, the product of pressure and volume of a given mass of gas is:
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a constant
fraction
whole number
a multiple
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Question # 4
If the energy of the activated complex lies close to energy of reactants, it means that reaction is
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Slow
Exothermic
Endothermic
Exothermic and fast
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Question # 5
All of the following are non covalent except
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Hydrophobic interactions
Disulphide bond
Hydrogen bond
Electrostatic bond
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Question # 6
The existence of an element in more than one form is called
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allotropy
isomorphism
polymorphism
isotropy
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Question # 7
Helical structure of protein is stabilized by
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Peptide bond
Dipeptide bond
Van der wall's forces
Hydrogen bonding
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Question # 8
If similar groups are attached to the same side, of C=C of alkene then it is
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Cis isomer
Trans isomer
Tautomer
AIl
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Question # 9
The amount of energy released when gaseous ions of opposite charges combine to give one mole of a crystalline ionic compound is called
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bond energy
heat of formation
lattice energy
ionization energy
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Question # 10
The forces of attraction between ions and water molecules are known as
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dipole-dipole forces
London forces
dipole- induced dipole forces
ion-dipole forces
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Question # 11
The electrolyte used in fuel cell is
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КOH
NaCl(aq)
NaNO3
Molten NaCl
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Question # 12
The liquid obtained after passing the mixture through filter paper is termed as:
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Extract
Residue
Filtrate
Sample
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Question # 13
Electrolysis is used for :
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Manufacture of caustic soda
Refining of copper
Electroplating
All of above
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Question # 14
Which of the following form normal oxide
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K
Li
Na
None
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Question # 15
Williamson's synthesis is used to prepare
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Diethylether
Phenolphthalein
Hydrogenation
Bakelite
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Question # 16
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Question # 17
Molar mass of high molecular w.f. polymers ranges from:
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1000 to 10000
10000 to 100000
100000 to 1000000
1000 to 100000000
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Question # 18
The ph of 10-3 mole dm-3 of an aqueous solution of H
2
SO
4
is :
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3.0
2.7
2.0
1.5
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Question # 19
A compound X contains 50% sulphur and 50% oxygen by mass. What is the empirical formula of compound X?
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SO
SO
2
SO
3
SO
4
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Question # 20
Francium is an element at the bottom of Group I in the Periodic Table. Which one of the following predication is likely to be correct?
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It will react with water to liberate oxygen
Its hydroxide will be a strong alkali in water
Its carbonate will decompose on heating to give carbon dioxide
Its nitrate on heating will give nitrogen dioxide and oxygen
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Question # 21
Which of the following is not a hydrocarbon
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Butane
Methyl benezene
Acetylene
Glucose
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Question # 22
Which of the following undergoes uncleophilic substitution exclusively by S
N
1 mechanism?
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Benzyl chloride
Ethyl chloride
Chlorobenzene
Isopropyl choride
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