11.Consider the following statements: Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to: 1. Acts as a reducing agent 2. Remove silica associated with the iron ore 3. Function as fuel, to supply heat 4. Acts as an oxidizing agents Of these statements:

12.Consider the following statements and select the correct answer from the codes given below: 1. The northern end of the earth�s axis is called North Pole 2. 45� parallel is half of the length of the equator 3. There is parallelism of the earth�s axis 4. The earth�s speed of revolution is faster in aphelion position Codes:

13.The limit beyond which stars suffer internal collapse is called:

14.At the winter solstice the noon altitude of the sun at the Tropic of Cancer is:

15.The colour of a star is an indication of its: