General Science & Ability MCQs 2011
Get ready for your CSS exam with a detailed review of the CSS 2011 General Science and Ability MCQs. This section focuses on essential topics that are crucial for the competitive exam. From understanding key astronomical concepts like the age of the solar system and solar eclipses to knowing about geology, electricity, and human biology, this list is a vital tool for all CSS aspirants aiming to ace their science paper.
The ozone layer protects the Earth from rays sent by the sun:
A) Ultraviolet rays
B) Infrared rays
C) Gamma rays
D) Radioactive rays
The ozone layer is present about 30 miles (50 km) in the atmosphere above Earth. The stratum (layer) of atmosphere in which the ozone layer lies is:
A) Exosphere
B) Mesosphere
C) Stratosphere
D) Ionosphere
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