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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
The enthalpy change AH of a process is given by the relation
Choose an answer
ΔΗ =ΔΕ + P∆V
ΔH=ΔE +W
ΔH =ΔΕ-ΔnRT
ΔΕ =ΔΗ + P∆V
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Question # 2
Benzene reacts with Ethyl chloride in presence of AICls to give
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Benzalchloride
Benzyl chloride
Ethyl benzene
Benzotrichloride
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Question # 3
If the number of gas molecules are doubled in the certain volume the pressure is:
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Increased to four times
Remains unchanged
Doubeld
Decrease to half
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Question # 4
Reason for the rancidity of fat is
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Low sponification
High reactivity of fat
Oxidation of fat
All
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Question # 5
RNA is a polymer of a nucleotide which consist of three components. Which one is not the component in the nucleotide of an RNA
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D-Ribose
wracil base
prosphate group
thyamine base
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Question # 6
An element that is not an essential par of proteins is
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O
N
H
S
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Question # 7
H2O and HF are the hydrides of the second period. Fluorine is more electronegative than oxygen. Anyhow, the boiling point of water is greater than that of HF. This is due to:
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water is more polar than HF
water has a bent structure
HF has a zig zag structure after making hydrogen bonding
the number of hydrogen bonds produced by water are greater than that of HF
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Question # 8
Which heavy metals do not have any safe limits
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As
Hg
Cr
All of these
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Question # 9
Monosaccharides belong to the group
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lipids
fats
proteins
carbohydrates
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Question # 10
The gases in the atmosphere are essential for sustaining life on earth. Thus oxygen is required for breathing. What for is carbon dioxide required
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To help plant to under go photosynthesis
To destroy nitrogen oxide from the atmosphere
To help to clean the atmosphere
To help in fixing of bacteria
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Question # 11
Liquid crystals are used for the early diagnosis of breast cancer by
Choose an answer
injecting liquid crystals
taking liquid crystals as diet
painting liquid crystals on the surface of breast
inhaling the smell of liquid crystals
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Question # 12
The higher molecular weight materials which yield on hydrolysis the amino acids is called:
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Carbohydrates
Lipids
Fatty acids
Proteins
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Question # 13
Best way to prevent rusting of iron is by
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Making iron cathode
Putting it in saline water
Both of these
None of these
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Question # 14
Which one of the following elements occurs free in nature?
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N
P
As
Sb
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Question # 15
The pH of the rain water in areas where acid rain is the cause of pollution may be
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6.5
5.6
4.5
2.2
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Question # 16
Which is used for the reduction of aldehydes and ketones
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NaBH
4
Pt/Pd
Ni
All of these
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Question # 17
Major component in cement is :
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SiO
2
Lime
Al
2
O
3
MgO
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Question # 18
Which of the following is the repeating monomeric unit in cellulose
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Sucrose
Maltose
Cellobiose
Glucose
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Question # 19
Fe
+3
and Mn
2+
are strong paramagnetic because the number of unpaired electrons in each is
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4
5
6
7
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Question # 20
A macroscopic property of a system which describes the initial and final state of the system is called
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Physical property
Chemical property
Energy property
State function
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Question # 21
In an electrolytic cell, the electrons flow from :
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Cathode to anode or opposite
Cathode to anode
Anode to cathode
Random flow
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Question # 22
All the elements belongs to the 2nd period are
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Normal elements
Transition elements
Stable elements
Halogens
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