Question

B. Choose the correct option.
1. The highest clouds are at about
a, 1 km above the surface of the earth
b, 15 km above the surface of the earth
c. 50 km above the surface of the earth
d. hundreds of kilometres above the surface of the earth

2. Which of these gases is present in the maximum amount in the atmosphere?
a. Oxygen b. Carbon dioxide c. Nitrogen d. Ozone

3. Which of these is not a property of air?
a. Air occupies space b. Air helps burning c. Air exerts pressure d. Air has no weight

4. Which of these works because of air pressure? a. Straw b. Dropper c. Doctor's syringe d. All of these

5. Which of these can be used to remove soluble impurities from water?
a. Distillation b. Filtration c. Sedimentation

6. Which of these processes is used in a town water supply to kill d. Decantation germs in water?
a. Sedimentation b. Filtration c. Boiling d. Chlorination​

Answer 1

Answer:

it has taken your lots of time in writing

Explanation:

1.b

2.c

3.d

4.d

5. all of these

6. d