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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
Which of the following statement about ribose is incorrect
Choose an answer
Poly hydroxyl compound
It is an aldo sugar
Contain six carbon atoms
It exhibit optical activity
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Question # 2
Carboxylic acid having two carboxyl group are:
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Mono-carboxylic acid
Di-carboxylic acid
Tri-carboxylic acid
Tetra carboxylic acid
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Question # 3
Benedict solution gives a positive test with but catalyze the same reaction:
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fructose
glucose
starch
sucrose
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Question # 4
Coenzymes are the species which increase the activity of enzymes. They are chemically:
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metal ions
none - metals
organic acids
organic bases
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Question # 5
A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called:
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fiber
plastic
varnish
polyamide resin
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Question # 6
Neutralization of acid-base is
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Spontaneous
Exothermic
Non spontaneous
Both "a" and "c
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Question # 7
The derivatives that cannot be prepared directly from the acetie acid
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Acetamide
Acetic anhydride
Ethyl acetate
Ester
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Question # 8
Which is the example of diffusion of gases
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bubbling in soda bottle
vapour condensing on a moist surface
hot air rising above a candle
spreading of smell from a scent bottle
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Question # 9
Why is carbon monoxide called as pollutant? The reason is that
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It combines with oxygen
It combines with haemoglobin
It inactivates glycolysis
It inactivates nerves
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Question # 10
How much quantity of water is in the domestic use
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0.08%
16%
24%
90%
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Question # 11
Carboxylic acid can be prepared from the reaction of Grigard's reagent with:
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Aldehydes
Ketones
Formaldehyde
CO
2
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Question # 12
Which statement about Arrhenius equation is incorrect
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Factor 'A' called Arrhenius constant depends upon collision frequency of reactants
Rate of reaction increase by increasing temperature
Rate constant k is increased
Activation energy Ea is decreased by rise in temperature
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Question # 13
On passing ethane into concentrated suphuric acid the intermediate compound formed on hydrolysis with boiling water gives
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Methyl alcohol
Ethyl alcohol
Ethyl hydrogen sulphate
Methyl hydrogen sulphate
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Question # 14
The equilibrium constant in a reversible chemical reaction at a given temperature
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Depends on the initial concentration of the reactants
Depends on the concentration of one of the products at equilibrium
Does not depend on the initial concentration of rectants
It is characteristic of the reaction
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Question # 15
Corrosion of iron can be prevented by coating the surface with
Choose an answer
Zn
Sn
Ni
Any of the above
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Question # 16
An excess of aqueous silver nitrate is added to aqueous barium chloride and precipitate is removed by filtration. What are the main ions in the filtrate
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Question # 17
Hydrolysis of alkyl nitriles is done to get carboxylic acids in the presence of
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Mineral acids
Mineral alkalies
Organics acids
Minerals acids & alkalies
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Question # 18
The classify the elements, Newland gave the idea of
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Octaves
Triads
Atomic volume
Atomic mass
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Question # 19
An artificial smell of banana is produced in many articles y using esters which of the following is that
Choose an answer
Amyl acetate
Isoamyl valerate
Octyl acetate
Methyl butyrate
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Question # 20
Which statement about the following equilibrium in correct?
2SO
2 (g)
+ O
2(g)
---------------2sO
3(g)
H= - 188.3 KJ mol-1
Choose an answer
T value of K
p falls witha rise in temperate.
The value of K
p falls withincreasing pressure
Adding V
2O
5
catalyst increase the equilibrium yield of sulfur trioxide
The value of K
p is equal to
K
p
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Question # 21
Which of the following (1 M) conducts more electricity?
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Sulphuric acid
Boric acid
Nitric acid
Phosphorus acid
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Question # 22
Butanenitrile is formed by reaction of KCN with
Choose an answer
Propyl alcohol
Butyl chloride
Butyl alcohol
Propyl Chloride
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