Which electro magnetic radiation is emitted by radioactive substance-
1). ?$gamma$ ?rays
2). Radio waves
3). Micro waves
4). ?x ? ray
1. Which of the following is the major constituent of LPG?
2. The compound to which H2 does not add is
3. What is the mass percentage of oxygen in carbon dioxide (CO2)?
5. An emulsifier is an agent which
6. Radioactive disintegration of uranium ultimately results in formation of
7. Which one among the following?substances is NOT a 'green house' gas ?
8. Which among the following is pure matter