General Science & Ability MCQs 2011

Which rocks are formed by the alteration of pre-existing rocks by great heat or pressure:
A) Igneous rocks
B) Sedimentary rocks
C) Metamorphic rocks
D) Acid rocks

The most abundant natural iron oxides are:
A) Magnetite and Pyrite
B) Magnetite and Bauxite
C) Hematite and Pyrite
D) Hematite and Magnetite

The most abundant elements in seawater are:
A) Sodium and Potassium
B) Sodium and Calcium
C) Sodium and Chlorine
D) Chlorine and Iodine

An electric current can produce:
A) Chemical effect
B) Magnetic effect
C) Heating effect
D) All of these

The unit of home electricity energy consumption is:
A) Watt hour
B) Kilowatt hour
C) Joule hour
D) Kilojoule hour

A magnet always points in the same direction, if it moves freely, i.e., towards north and south poles, because of:
A) Gravitational field
B) A lot of metal deposits on north and south poles
C) Due to attraction of north pole and repulsion of western pole
D) Earth is a huge magnet

When sound is reflected from floor, ceiling, or a wall, it mixes with the original sound and changes its complexion, it is called:
A) Sound
B) Echo
C) Reverberation
D) Noise

The speed of sound in dry air at 20°C is about:
A) 130 meters per second
B) 230 meters per second
C) 330 meters per second
D) 550 meters per second

The speed of light in a vacuum is about:
A) 300 million meters per second
B) 300 million meters per hour
C) 300 million kilometers per second
D) 300 million kilometers per hour

The planet of the solar system which has the maximum number of moons is:
A) Jupiter
B) Venus
C) Saturn
D) Uranus