Optic fibers are mainly used for which of the following?
A). Musical instruments
B). Food industry
C). Weaving
D). Communication
2. The element with highest first ionisation energy is
3. The Bhopal tragedy was caused by the gas
5. A man is hemophiliac. This indicates that he
6. Which of the following vegetable oils does not contain essential fatty acids ?
7. The fuel used in an atomic reactor is
9. Helium gas is used in gas balloons instead of hydrogen gas because it is