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UPSC Prelims 1979
UPSC Prelims 1980
UPSC Prelims 1981
UPSC Prelims 1982
UPSC Prelims 1983
UPSC Prelims 1984
UPSC Prelims 1985
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Select an option below each question to test your knowledge.
2066 Questions Found
1626.
Hybridisation is useful in developing improved crops by
A
Creating new and better genes
B
Eliminating undesirable genes
C
Producing favourable combination of gases
D
By encouraging favourable genes and removing unfavourable ones
Examination:
UPSC Prelims 1981
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Comprehensive Explanation
1627.
Maximum production of paddy per unit water consumption can be best achieved in a
A
Non-porous soil
B
Porous soil
C
Impervious soil
D
Soil that allows slow percolation
Examination:
UPSC Prelims 1981
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Comprehensive Explanation
1628.
Why the Indian farmers plough their fields during the time interval between two crops ?
A
In order to keep the soil loose for further cultivation
B
To increase the porosity of the soil
C
To escape drought
D
To prevent clodding
Examination:
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1629.
Gypsum is added to the soil ?
A
To increase the alkalinity
B
To decrease the acidity
C
To decrease the alkalinity
D
As an insecticide
Examination:
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Comprehensive Explanation
1630.
Which of the following is the most common wheat disease in India ?
A
Green ear
B
Smut
C
Loose smut
D
Rust
Examination:
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1631.
When the rice is boiled, it expands because
A
The starch gelatinises and swells
B
The starch gets polymerised
C
The grains absorb moisture and swell
D
Sugars break down in the grains
Examination:
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1632.
Why is it easier to cook in a pressure cooker ?
A
High pressure creates turbulence
B
More steam is formed inside the cooker
C
Boiling point of water is raised
D
Boiling point of water is lowered
Examination:
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1633.
The deficiency of causes goitre
A
Sulphur
B
Iodine
C
Calcium
D
Vitamin A
Examination:
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1634.
What happens when the temperature of water falls from 30°C to 0°C?
A
The volume of ice formed will be less than volume of water
B
The volume of ice formed will be more than the volume of water
C
Water will not freeze at 0°C
D
None of the above
Examination:
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Comprehensive Explanation
1635.
What happens when alcohol is taken in excess?
A
It destroys the liver
B
It produces inflammation of the stomach
C
It causes the heart to become weak
D
All of the above
Examination:
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Comprehensive Explanation
1636.
Colour blindness is
A
More common among women
B
Very rare in women
C
Very rare in men
D
Found to the same extent in both the sexes
Examination:
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1637.
The sex of the offspring is determined, when
A
The conception takes place
B
The sperm fertilises the ovum
C
The embryo is partially developed
D
The end of gestation period is near
Examination:
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Comprehensive Explanation
1638.
Why camphor disappears when kept on a plate?
A
It sublimes
B
It reacts with the metal of the container
C
It reacts with the gases of the air
D
None of the above
Examination:
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Comprehensive Explanation
1639.
Mark the correct answer
A
Planets have an apparent motion and twinkle
B
Planets have no apparent motion but twinkle
C
Planets have an apparent motion but do not twinkle
D
Planets have no apparent motion and do not twinkle
Examination:
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Comprehensive Explanation
1640.
Which organ is associated with the production of insulin in the human body?
A
Pancreas
B
Liver
C
Kidney
D
Heart
Examination:
UPSC Prelims 1981
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Comprehensive Explanation
1641.
Why does man weigh more at the poles than at the equator?
A
Because there is no atmosphere at the poles
B
Because gravitational pull is more at the poles
C
Because gravitational pull is less at the poles
D
None of the above
Examination:
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Comprehensive Explanation
1642.
Dysentery and Influenza are caused by
A
Bacteria
B
Viruses
C
Bacteria and Viruses respectively
D
Viruses and Bacteria respectively
Examination:
UPSC Prelims 1981
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Comprehensive Explanation
1643.
A person with which blood group will be a universal donor?
A
A
B
B
C
O
D
AB
Examination:
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Comprehensive Explanation
1644.
In what sequence are the following obtained from a natural gas well?
Natural Gas
Water
Crude oil
A
1, 3, 2
B
1, 2, 3
C
3, 2, 1
D
2, 1, 3
Examination:
UPSC Prelims 1981
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Comprehensive Explanation
1645.
Which of the following is commonly present in the acids?
A
Oxygen
B
Hydrogen
C
Sulphur
D
Nitrogen
Examination:
UPSC Prelims 1981
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Comprehensive Explanation
1646.
Which of the following statements is true?
A
Both salinity and density of sea increase with depth
B
Both salinity and density of sea decrease with depth
C
Salinity increases but density of sea decreases with depth
D
Salinity decreases but density of sea increases with depth
Examination:
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Comprehensive Explanation
1647.
Why the countries are scared to import fruits ?
A
Because they become rotten easily and spread diseases
B
Because they are not easily adjustable to new climate
C
Because insects carried through fruits are dangerous
D
All of the above
Examination:
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Comprehensive Explanation
1648.
How the body temperature is maintained ?
A
Due to temperature regulating mechanism located in the base of the brain
B
Due to excessive intake of water
C
Due to regular intake of foods
D
Due to the constant flow of blood in the capillaries
Examination:
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Comprehensive Explanation
1649.
When a person moves from poles to the equator, the population of plants and animals will
A
Increase
B
Decrease
C
Remain unchanged
D
Not show any consistent behavior
Examination:
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Comprehensive Explanation
1650.
When the ice floating in a glass of water melts, the level of water will
A
Increase
B
Decrease
C
Remain constant
D
First increase and then decrease
Examination:
UPSC Prelims 1981
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