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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
Alkyl halides are considered to be very reactive compounds towards nucleophiles, because
Choose an answer
The have an electrophilic carbon
They have an electrophilic carbon and a bad leaving group
They have an electrophilic carbon and a good laving group
They have a nucleophilic carbon and a good leaving group
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Question # 2
Three elements needed for the healthy growth of plants are
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N P K
N K C
N S P
N Ca P
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Question # 3
Which of the following is synthetic thermoplastic polymer
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PVC
Bakelite
Synthetic varnishes
Both b & c
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Question # 4
Isozymes are the enzymes which:
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have similar chemical properties
have similar physical properties
have different physical and chemical properties
have different physical and chemical properties
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Question # 5
Nucleic acid fist descovered in
Choose an answer
1868
1869
1900
1905
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Question # 6
Ratio of hydrogen (H) and oxygen (O) in water molecule by volume is
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2: 1
1: 2
3: 1
4: 1
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Question # 7
Macro-nutrients are required in quantities ranging from
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5 kg - 200 kg
2 kg - 100 kg
1 kg - 50 kg
10 kg - 100 kg
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Question # 8
Ornithine is
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A basic amino acid
An essential amino acid
Present in protein structure
All of these
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Question # 9
All gases can be compressed by:
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Keeping constant pressure
Decreasing pressure
Increasing pressure
None of above
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Question # 10
Proteins loose their ability to work
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by slight heating
by change in structure
by slight cooling
when inside the body
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Question # 11
There are _________ types of solids
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1
2
3
4
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Question # 12
When sodium benzoate is treated with soda lime (NaOH) benzene is formed. What is the other product
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Na
2
CO
3
NaHCO
3
Ca(OH)
2
CaCO
3
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Question # 13
If the radius of first Bohr orbit be a
o
, then the radius of third Bohr orbit would be
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3 x a
o
6 x a
o
9 x a
o
1/2 x a
o
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Question # 14
The most distinctive character among the elements is their division into
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Metals and non-metals
Solids, liquids and gases
Atoms and molecules
Active and inactive elements
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Question # 15
Increased asthmatic attacks in certain seasons are related to
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Inhalation of seasonal pollen
Eating of seasonal vegetables
Low temperature
Wet and dry environment
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Question # 16
A carboxylic acid with one caboxyl group:
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Monocarboxylic acid
Dicarboxylic acid
Tricarboxylic acid
Polycarboxylic acid
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Question # 17
Weakest acid among the followings is
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Acetic acid
Phenol
Water
Acetylene
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Question # 18
The rate constant k of a reaction activation energy Ea and temperature are related by Arrhenius in the form of an equation which is
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Question # 19
Acetone reacts with HCN to form a cyanohydrin. It is an example of:
Choose an answer
Electrophilic addition
Electrophilic substitution
Nucleophilic addition
Nucleophilic substitution
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Question # 20
The valency of noble gases, in general, is
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Zero
One
Three
Two
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Question # 21
Which of the element is not alkali metal
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Lithium
Rubidium
Francium
Magnesium
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Question # 22
Which of the following expressions show a heterolytic bond fission
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