Calcium salts used as fertilizer is:
1). Calcium Carbide
2). Calcium Carbonate
3). Calcium Cyanide
4). Calcium Sulphate
2. Solder metal is an alloy of
3. The atmospheric gas that is mainly responsible for Green House effect :
4. The gas used in the artificial ripening of fruits is
5. Question 14.21:What are nucleic acids? Mention their two important functions.
7. What is the common characteristic of the elements of the same group in the periodic table?
8. Ethanol containing 5%. water is known as
10. Which of the following elements is not present in stainless steel?