Question

5. Which of the following is used for dissolution of gold?
(a) Hydrochloric acid
(b) Sulph
(c) Nitric acid
(d) Aqua
7. Which of the following is not a mineral acid?
(a) Hydrochloric acid
(b) Citric
(c) Sulphuric acid
(d) Nitri
3. Which among the following is not a base?
(a) NaOH
(b) KOH
(C) NH4OH
(d) C2H5
9. Which of the following statements is not correct ?
(a) All metal carbonates react with acid to give a salt, water and c:
(b) All metal oxides react with water to give salt and acid
(c) Some metals react with acids to give salt and hydrogen
(d) Some non-metal oxides react with water to form an acid​

Answer 1

Answer:

5. Aqua.

7. Citric

3. C2H5

9. I think Option (b)........

Answer 2

5.b, 7.b, 3.c, 9.a are the answers for those questions