1. Which is unnecessary for purification of water for drinking purposes?

2. Which of the following is not an element of III A group or IIA group?

3. Bile acids are the derivatives of ________

4. Gooch crucible is used for the filtration of precipitates having

5. The yellowish colour in photochemical smog is due to the presence of

6. In proteins amino acid residues are joined together by.

7. Ethylene combines with water in the presence of

8. Which is the composition of Lindler's Catalyst

9. By using the fluted filter paper rate of filtration is

10. Which of the following vitamin is NOT made up of isoprene units;