Science Questions Update

Find the 9th term of the arithmetic progression 18, 12, 6, 0, -6 _______

Hydra removes undigested food by
A) Passing it through the a**s
B) Passing it through the mass
C) Means of a contractile vacuole
D) Egesting it through the body surface.
E) Passing it through the nose

The force with which an object is attracted to the earth is called
A) Acceleration
B) Mass
C) Gravity
D) Weight
E) Momentum

Satellite communication make use of
A. Radio wave.
B. Sound wave
C. Infra-red wave
D. Visible light.

The ray which cause gas molecules to glow is known as
A. Gamma ray
B. Molecule ray
C. Cathode ray
D. Anode ray

The effluent of an industrial plant used in electrolysis of conc. brine, with mercury cathode may contain impurities like
A. Oxygen
B. Hydrogen
C. Mercury(11)chloride
D. Hydrogen chloride