Which of the following is biodegradable?
(A) Paper
(B) D.D.T.
(C) Aluminum
(D) Plastic
The 'Greenhouse effect' is produced due to the presence of excess amount of
(A) Sulphur dioxide
(B) Nitrogen dioxide
(C) Carbon monoxide
(D) Methane
An element that does not occur in nature but can be produced artificially is
(A) thorium
(B) radium
(C) plutonium
(D) uranium
In the human body, fats are stored in the
(A) Epidermis
(B) Adipose tissue
(C) Liver
(D) Epithelium
Materials for rain-proof coats and tents owe their water proof properties to
(A) Surface tension
(B) Viscosity
(C) Specific gravity
(D) Elasticity
Which part of the nervous system controls the activities of internal organs?
(A) Spinal cord
(B) Cerebrum
(C) Cerebellum
(D) Medulla Oblongata
Solar cells work on the principle of
(A) Photovoltaic effect
(B) photoelectric effect
(C) photoconductive effect
(D) photosynthesis
Which electromagnetic radiation is used for satellite communication?
(A) Ultraviolet
(B) Infrared
(C) Microwave
(D) Millimeter wave
X - rays region lies between
(A) Ultraviolet and visible region
(B) Visible and infra - red region
(C) Gamma - rays and ultraviolet region
(D) Short radio waves and long radio waves
Which one of the following is a condition of delayed blood clotting?
(A) Haemorrhage
(B) Hematuria
(C) Haemophilia
(D) Anaemia
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