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NAT II Physical Science Chemistry MCQs With Answers
Question # 1
Cannizzaro reaction is not given by
Choose an answer
Trimethyl acetaldehyde
Acetaldehyde
Benzaldehyde
Formaldehyde.
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Question # 2
Which of the following mineral does not contain Al?
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Cryolite
Mica
Feldspar
Fluorspar
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Question # 3
Salol is prepared from
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Salicyclic acid and phenol
Salicyclic acid and methyl alcohol.
Both
None
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Question # 4
The pure crystalline substance on being heated gradually first forms turbid liquid at constant temperature and still at higher temperature turbidity completely disapp-ears. The behaviour is a characteristic of substance forming
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Allotropic crystal
Liquid crystals
Isomeric crystals
Isomorphous crystals
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Question # 5
Which of the following geometry is associated with the compound in which the central atom assumes sp
3
d hybridization?
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Planar
Pyramidal
Angular
Trigonal bipyramidal
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Question # 6
Setting of cement is an
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Exothermic reaction
Endothermic reaction
Neither exothermic nor endothermic
None
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Question # 7
Which of the substances Na, Hg, S, Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution?
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Na, Pt and graphite
Na and Hg
Pt and graphite only
Na and S only
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Question # 8
As a fixing agent in photography, sodium thisoulphate is used for
Choose an answer
Dissolving out unreacted silver bromide
Converting silver halides to metallic silver
Reducing solubility of AgBr
Preventing overdeveloping and fogging.
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Question # 9
The disaccharide present in milk is
Choose an answer
Sucrose
Maltose
Lactose
Cellobiose
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Question # 10
Calcium acetate when dry distilled
Choose an answer
Formaldehyde
Acetaldehyde
Acetone
Acetic anhydride
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Question # 11
Ammonia gas used directly as a fertilizer is injected into the soil at a depth of about
Choose an answer
Two inches
Three inches
Five inches
Six inches
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Question # 12
Bleaching action of bleaching powder is due to the liberation of
Choose an answer
O
2
OCl
-
Cl
2
Cl
-
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Question # 13
When KClO
3
is heated, it decomposes into KCl and O
2. If some MnO2 is added, the reaction goes much faster because
Choose an answer
MnO
2
decomposes to give O
2
MnO
2
provide heat by reacting
Better contact is provided by MnO
2
MnO
2
acts as a catalyst.
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Question # 14
Which of the following value of
Δ
Hf represent that product is least stable?
Choose an answer
-94.0 kcal mol
-1
-231.6 kcal mol
-1
+21.4 kcal mol
-1
+64.8 kcal mol
-1
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Question # 15
The reaction/method that does not give an alkane is
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Catalytic hydrogenation of alkanes
Wurtz reaction
Hydrolysis of alkyl magnesium bromide
Dehydrohalogenation of an alkyl halide.
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Question # 16
The spectrum of helium is expected to be similar to that of
Choose an answer
H
Li
+
Na
He
+
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