Science and Environment Quiz:

August 8, 2022

Antigen is a substance which

(A) Destroys harmful bacteria
(B) Is used to treat poisoning
(C) Lowers body temperature
(D) Stimulates formation of antibody

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Answer – D

“ Athlete’s Foot ” is a disease caused by

(A) Bacteria
(B) Fungus
(C) Protozoan
(D) Nematode

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Answer – B

Haemophilia is a genetic disorder which leads to

(A) Decrease in haemoglobin level
(B) Rheumatic heart disease
(C) Decrease in WBC
(D) Non-clotting of blood

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Answer – D

Assertion (A): Steam is more harmful for human body than the boiling water in case of burn.
Reason (R): Boiling water contains more heat than steam.

(A) Both A and R are true, and R is the correct explanation of A
(B) Both A and R are true, but R is not the correct explanation of A
(C) A is true, but R is false
(D) A is false, but R is True

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Answer – C

Consider the following statements
1. Clear sky appears blue due to poor scattering of blue wavelength of visible light.
2. Red part of light shows more scattering than blue light in the atmosphere.
3. In the absence of atmosphere, there would be no scattering of light and sky will look black.
Which of the statements given above is/are correct?

(A) Only 1
(B) 1 and 2
(C) Only 3
(D) All of these

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Answer – C

The pressure exerted on the ground by a man is greatest

(A) When the lies down in the ground
(B) When the stands on the toes of one foot
(C) When the stands with both foot flat on the ground
(D) All of the above yield the same pressure

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Answer – B

Viewfinders, used in automobiles to locate the position of the vehicles behind, are made of

(A) Plane mirror
(B) Concave mirror
(C) Convex mirror
(D) Parabolic mirror

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Answer – C

When deep sea fishes are brought to the surface of the sea, their bodies burst. This is because the blood in their bodies flows at very

(A) High speed
(B) High pressure
(C) Low speed
(D) Low pressure

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Answer – B

Dispersion process forms spectrum due to white light falling on a prism. The light wave with shortest wavelength

(A) Refracts the least
(B) Does not change the path
(C) Refracts the most
(D) Is reflected by the side of the prism

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Answer – C

A ray of white light strikes the surface of an object. If all the colours are reflected the surface would appear

(A) Black
(B) White
(C) Grey
(D) opaque

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Answer – B