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Chemistry General Science Test Hard Mode MCQs With Answers
Question # 1
The number of electrons in the M shell of the element with number 24 is
Choose an answer
24
12
13
8
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Question # 2
Which of the following fluorides does not exist?
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NF
5
PF
5
AsF
5
SbF
5
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Question # 3
The ratio of close packed atoms to tetrahedral holes in cubic close packing is
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1 : 1
1 : 2
1 : 3
2 : 1
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Question # 4
The number of unpaired electrons in the P-subshell of oxygen atom
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1
2
3
4
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Question # 5
Fertilizer are made by
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Nature only
Artificial methods only
Both artificial and natural methods
None of the above
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Question # 6
Enzymes are
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Proteins
Mineral
Oils
Fatty acids
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Question # 7
The following has zero valency
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Na
Be
AI
Kr
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Question # 8
Which of the following halogens does not forms its oxyacids?
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Fluorine
Chlorine
Bromine
Iodine
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Question # 9
In cold countries ethylene glycol is added to water in radiators of cars during winter It result in
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Lowering in b.pt.
Reducing viscosity
Reducing specific heat
Lowering in freezing pt.
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Question # 10
An exothermic reaction is one in which the reacting substances
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Have more energy than the products
Have less energy than the products
Have the same energy as the products
Are at a higher temperature than the products
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Question # 11
Cannizzaro reaction is not given by
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Trimethyl acetaldehyde
Acetaldehyde
Benzaldehyde
Formaldehyde
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Question # 12
If a salt bridge is removed electrode is made from which of the following?
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ZnCl
2
CuSO
4
Hg
2
Cl
2
HgCl
2
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Question # 13
The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called
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Functional isomers
Position isomers
Chain isomers
Metamers
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Question # 14
Reaction of acids with alcohols is also known as
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Esterification
Saponification
Alkalization
None
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Question # 15
The rate of reaction between A and B increases by a factor of 100, and when the concentration with respect to A is increased 10 folds, the order of reaction w.r.t. A is
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10
1
4
2
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Question # 16
Which of the following compounds has the lowest anion to cation size ratio?
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LiF
NaF
Csl
CsF
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Question # 17
Ammonia gas used directly as a fertilizer is injected into the soil at a depth of about
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Two inches
Three inches
Five inches
Six inches
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Question # 18
Helium-oxygen mixture is used by deep sea divers in preference to nitrogen-oxygen mixture because
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Helium is much less soluble in blood than nitrogen
Helium is much less soluble in blood than helium
Under the sea nitrogen and oxygen react to give poisonous nitric oxide
Nitrogen is highly soluble in water.
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Question # 19
Which of the following has no tin in its composition?
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Solder
Bronze
Brass
Tin stone
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Question # 20
Fertililzer are made by
Choose an answer
Nature only
Artificial methods only
Both artificial and natural methods
None of the above
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Question # 21
The reagent which forms crystalline osazone derivation when treated with glucose is
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Fehling solution
Phenyl hydrazine
Benedict solution
Hydroxyl amine
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Question # 22
In public urinals, we observe some nascent smell. This smell is due to
Choose an answer
Hydrolysis of urea of urine by urease of atmosphere into NH
3
and CO
2
Formation of sulphonic acid by urea of urine
Reaction of CO
2
of atmosphere with urea mononitrate in urine
Hydregen present in air reacts with nitrogen forming NH
3
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