Questions

___________ gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.

The pH of a solutiion is 3. When its pH changes to 6, then H+ ion concentration

The body of all complex animals consist of only _______ basic types of tissue(s).

A human body works within the pH range of

Which type of cell, skin is made up of:

Which of the following function is performed by the kidneys in the human body?

In each of the following choose the word most nearly opposite in meaning to the word given in capitals.

“DEROGATORY”

In the following passage some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

Books are our ______ friends. They are our guides. We can learn everything from them. The books contain all the great ______ of the world's leaders and we can learn them by reading the books. The books help us find ______ to our questions. The books never fail us. We should read as ______ books as we can. But all books are not good. So we should ______ only good books.

the great ______ of our world.