Balloons are filled with
A). Nitrogen
B). Helium
C). Oxygen
D). Argon
1. Which of the following is a supercooled liquid?
2. The acid rain destroys vegetations because it contains
3. This group of alumino silicate minerals is widely used In making electrical insulators
4. A falling drop of rain water acquires the spherical shape due to
5. When lime juice is dropped on baking soda brisk effervescence takes place because the gas evolved is
6. The purity of gold is expressed in carats. The purest form of goldis.
7. The best conductor of heat among the following is
8. The Bhopal gas tragedy was caused by the gas
9. Who discovered the atom bomb?
10. Which one of the following has the highest value of specific heat?