71.

Drug which helps to reduce anxiety and brings about calmness is

• tranquiliser

• diuretic

• analgesic

• antihistamine

A keel is absent in

• chicken

• ostrich

• duck

• peacock

Broad-spectrum antibiotics are produced by

• streptomyces

• aspergillus

• pencillium

• bacillus

The pigment that protect plants from harmful effect of ultraviolet rays is

• chlorphyll

• carotenoid

• phycocyanin

• plastic

Glycogen, starch and cellulose are polymers of

• fructose

• glucose

• lactose

• maltose

Black death is

• cancer

• plague

• AIDS

• gonorrhoea

Stars appear to move from East to West because the

• whole universe is moving from East to West

• Earth is revolving around the sun

• Earth is rotating from East to West

• Earth is roating from West to East

On the Moon, an astronaut cannot drink lemonade with the help of straw because

• acceleration due to gravity on the Moon is less

• there is no atmosphere on the Moon

• lemonade evaporates instantaneously on the Moon

• None of the above

A particle moving with uniform speed

• must have uniform velocity

• cannot have uniform velocity

• may have uniform velocity

• will have no velocity

Device which uses sound waves for detection and ranging is called

• radar

• sonar

• pukar

• None of these