General Science & Ability MCQs 2014

Permanent hardness of water is due to the presence of:
A) Calcium bicarbonate
B) Magnesium bicarbonate
C) Calcium sulphate
D) Sodium bicarbonate

The density of three liquids are D, 2D, and 3D. What will be the density of the resulting mixture if equal volumes of the three liquids are mixed?
A) 1.5D
B) 2D
C) 3D
D) 6D

Articles made of copper and bronze slowly tarnish in air and turn green; the green color is due to the formation of:
A) Copper oxide
B) Copper sulphide
C) Copper oxalate
D) None of these

Which of the following is a conventional designation of pre-released software?
A) Raw
B) Alpha
C) Omega
D) Beta

Bleaching powder loses its power on keeping for a long time because:
A) It changes into calcium hypochlorite
B) It changes into calcium chloride and calcium hydroxide
C) It absorbs moisture
D) It changes into calcium chloride and calcium chlorate

Light year is related to:
A) Time
B) Distance
C) Energy
D) Speed

When the quantity of charge on each of the two bodies is doubled, the force between them becomes:
A) One fourth
B) One half
C) Twice
D) Four times

Light year is related to:
A) Time
B) Distance
C) Energy
D) Speed

The word ceramic means:
A) Hard material
B) Soft material
C) Dry material
D) Burnt material

The operation of a solar cell is based on:
A) Laser technology
B) Photoconduction
C) Thermal emission
D) Tyndall effect