Question

6. The nature of calcium phosphate is present in tooth enamel is
(a) Basic (b) Amphoteric (c) Acidic (d) Neutral
7. Which of the following salts has no water of crystallization?
(a) Blue vitriol (b) Washing soda (c) Baking soda (d) Gypsum
8. The function of quick lime in soda lime mixture is to
(a) Absorb moisture present in soda lime
(b) Increase the efficiency of soda lime
(c) Increase the pH of soda lime
(d) Take part in reaction with NaOH
9. The Ph of a solution of HCL is 4. This shows that the molarity of the solution is
(a) 4.0M (b) 0.4M (c) 0.0001M (d) 0.001M
10. The difference of molecules of water in gypsum and PoP is
(a)5/2 (b) 2b (c) 3/2 (d) ½
11. Which of the following does not form an acidic salt?
(a) Phosphoric acid (b) Carbonic acid (c) Hydrochloric acid (d) Sulphuric acid
12. The chemical formula of caustic potash is
(a) NaOH (b) Ca(OH)2 (c) NH4OH (D) KOH​

Answer 1

Answer:

6. (a) basic

7. (b) washing soda

8. (b) increase the pH of soda lime

9. (a) 4.0M

10. (c) 3/2

11. (b) carbonic acid

12. (c) NH4OH