Q. Define unit vector?

Q. Define the following terms: Macromolecular colloids.

Q. Why do we use concave lenses for correcting myopia?

Q. Explain the importance of Railways as a means of transport.

Q. State five differences between the Central Bank and a Commercial Bank.

Q. Who wrote the story Sultana’s Dream? What is the story all about?

Q. Define : Colligative property.

Q. Improvement in water and sanitation can control many diseases’. Explain with the help of examples.

Q. Most Harappan seals are made of .

Q. Justify the position of hydrogen in the periodic table on the basis of its electronic configuration.