Q12. Assertion (A) : The same face of the moon is always presented to the earth. Reason (R) : The moon rotates about its own axis in 23 and half days which is about the same time that it takes to orbit the earth.

Assertion (A) : During the neap tides. The high tide is lower and the low tide is higher than usual. Reason (R) : The neap tide, unlike the spring tide, occurs

Assertion (A): To orbit around the Sun the planet Mars takes lesser time than the time taken by the earth. Reason (R): The diameter of the planet Mars is less t

Assertion (A): Artificial satellites are always launched from the earth in the eastward direction. Reason (R): The earth rotates from west to east and so the sa

Assertion (A) : Wind patterns are clockwise in the Northern Hemisphere and anti-clockwise in the Southern Hemisphere. Reason (R) : The directions of wind patter

Assertion (A) : 60° - 65° latitudes in both the hemispheres have a low pressure belt instead of high pressure. Reason (R) : The low pressure areas are permanent

Assertion (A) : Existence of human life on Venus is highly improbable. Reason (R): Venus has extremely high level of carbon dioxide in its atmosphere.

Assertion (A): The weight of a body decreases with the increase of altitude on earth. Reason (R): The earth is not a perfect sphere. Codes:

Assertion (A) : Thickness of the atmosphere is maximum over the Equator. Reason (R) : High insolation and strong convection currents occur over the Equator.

Assertion (A) : The amount of moisture in the atmosphere is related to latitude. Reason (R) : The capacity to hold moisture in the form of water vapour is relat

Assertion (A) : The surface winds spiral inwards upon the centre of the cyclone. Reason (R) : Air descends in the centre of the cyclone.

Given below are two statements one labelled as Assertion (A) and the other labelled as Reason (R). Assertion (A) : Areas near the equator receive rainfall throu

Assertion (A): Areas lying within five to eight degrees latitude on either side of the equator receive rainfall throughout the year. Reason (R): High temperatur

Assertion (A) : Eastern coast of India produces more rice than the western coast. Reason (R) : Eastern coast receives more rainfall than the western coast.

Assertion (A) : India does not export natural rubber. Reason (R) : About 97% of India’s demand for natural rubber is met from domestic production.

Assertion (A): In a motion picture, usually 24 frames are projected every second over the whole length of the film. Reason (R): An image formed on the retina of

Assertion (A): Sodium metal is stored under kerosene. Reason (R): Metallic sodium melts when exposed to air. (a) Both A and R are true and R is the correct expl

Assertion (A): In our houses, the current in the A.C. electricity line changes direction 60 times per second. Reason (R): The frequency of alternating voltage s

Assertion (A): An iron ball floats on mercury but gets immersed in water. Reason (R): The specific gravity of iron is more than that of mercury. Codes:

Assertion (A): A jet aircraft moving at Mach Number equal to 1 travels faster at an altitude of 15 km than while moving at Mach Number equal to 1 near the sea l

Assertion (A): A jet aircraft moving at Mach Number equal to 1 travels faster at an altitude of 15 km than while moving at Mach Number equal to 1 near the sea l

Assertion (A): The boiling point of water decreases as the altitude increases. Reason (R): The atmospheric pressure increases with altitude. Codes: (a) Both A a

Assertion (A): Small glass beads fixed on traffic signals glow brightly when light falls upon them. Reason (R): Light is totally reflected when the angle of inc

Assertion (A) : Bangalore receives much higher average annual rainfall than that of Mangalore. Reason (R) : Bangalore has the benefit of receiving rainfall both

Assertion (A) : River Kalinadi is an east-flowing river in the southern part of India. Reason (R) : The Deccan Plateau is higher along its western edge and gent

In the northern hemisphere, the longest day of the year normally occurs in the:

On 21st June, the Sun :

Variations in the length of daytime and night time from season to season are due to :

A person stood alone in a desert on a dark night and wanted to reach his village which was situated 5 km east of the point where he was standing. He h

Electrically charged particles from space traveling at speeds of several hundred km/sec can severely harm living beings if they reach the surface of t

Consider the following statements : 1. On the planet Earth, the fresh water available for use amounts to about less than 1% of the total water found.

Which one of the following planets has the largest number of natural satellites or moons ?

In order of their distances from the Sun, which of the following planets lie between Mars and Uranus?