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General Science MCQ Questions and Answers for competitive exams

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General Science MCQ Questions and Answers for competitive exams UPSC IAS Prelims, SSC CGL, CHSL,UGC NET, bank exams , Entrance exams test Online Quiz practice Questions Practice

General Science gk Questions and Answers

2296.
How many colours the sunlight spectrum has?

a
Three
b
Seven
c
Four
d
Five
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2297.
What is the life span of RBC?

a
120 days
b
100 days
c
130 days
d
110 days
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2298.
Tetraethyl lead is used as

a
mosquito repellent
b
pain killer
c
fire extinguisher
d
petrol additive
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2299.
The property of a substance to absorb moisture from the air on exposure is called

a
Desiccation
b
Deliquescene
c
Osmosis
d
Efflorescence
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2300.
Hydrometer is an instrument

a
To detect the presence of hydrogen in the atmosphere
b
For measuring the specific gravity of liquids
c
To detect the changes in atmospheric humidity
d
None of the above
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2301.
Lactometer is used to determine

a
Purity of water
b
Purity of milk
c
Purity of food
d
Purity of fruit
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2302.
Wood is the primary raw material for the manufacture of:

a
paper
b
gun powder
c
paint
d
ink
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2303.
The contact process is involved in the manufacture of

a
Ammonia
b
Caustic soda
c
Sulphuric acid
d
nitric acid
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2304.
The enzymes sucrase acts on

a
sucrose only
b
any organic monomer
c
sucrose and starch
d
all disaccharides
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2305.
The number of ribs in a human body is

a
22
b
24
c
21
d
23
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2306.
The fastest-running terrestrial animal is

a
cheetah
b
lion
c
man
d
jaguar
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2307.
The main constituent of biogas is -

a
Butane
b
Methane
c
Hydrogen
d
Acetylene
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2308.
Glass is made from the mixture of

a
Sand and salt
b
Sand and silicates
c
Quartz and mica
d
None of these
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2309.
Bats can fly in the dark, because -

a
They have better vision in the dark
b
The pupils of their eyes are very big
c
They are guided by ultrasonic waves produced by them
d
None of the above
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2310.
Which one of the following elements is present in green pigment of leaf?

a
Iron
b
Calcium
c
Phosphorus
d
Magnesium
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