Question

6. Rehaan said that, we should always neutralize the effluents coming from industries before
releasing them in water bodies. Do you agree with him? If yes, why? If not, why?
SCHOOL
A) No, because neutralized effluents is dangerous to aquatic life,
B) Yes, because effluents are dangerous to aquatic life.
C) Yes, because it makes the water clean.
D) No, because we cannot neutralize the effluents,
7. Acid rains are the combination of these acids.
A) Hydrochloric acid + Nitric acid + Sulphuric acid
B) Sulphuric acid + Nitric acid + Carbonic acid
C) Carbonic acid + Hydrochloric acid + Sulphuric acid
D) Sulphuric acid + Carbonic acid + Hydrochloric acid
8. Phenolphthalein gives
colour when mixed with bases.
A) Pink
B) Red
C) Blue
D) Yellow
9. Match the correct pair,
1) Acetic acid
a) Apple
2) Malic acid
b) Tomato
3) Ascorbic acid c) Vinegar
4) Oxalic acid
d) Amla
A) 1-b. 2-d, 3-a, 4-0
B) 1-c, 2-a, 3-d, 4-b
C) 1-a, 2-b, 3-c, 4-d
D)1-d, 2-c, 3-5, 4-a​

Answer 1

Answer:

6 b

8a

9b

7b I am not sure with this one

Answer 2

6)No, because neutralized effluents is dangerous to aquatic life(6-a)

7)Sulphuric acid + Nitric acid + Carbonic acid(7-b)

8)pink(8-a)

9)1-c, 2-a, 3-d, 4-b(9-b)