Which of the following is used for removing air bubbles from glass during its manufacture?
A). Arsenous oxide
B). Potassium carbonate
C). Soda ash
D). Feldspar
1. The gas used for artificial fruit ripening of green fruit is
2. Which one of the following is a microelement?
3. The substance which does not expand on going from liquid state to solid state is
4. Muscle fatigue is caused by the accumulation of:
5. The main constituent of naturalgas is
6. A concave lens always forms an image which is
8. Iodized salt is beneficial for
9. The advantage of detergents over soaps is
10. Which type of fire extinguisher is used for petroleum fire?