Question

State if the following statements are true or false. Correct the statement if it is false.

1. Increase in pressure decreases the boiling point of water.

2. Pure water has its maximum density at 0 degree celsius.

3. Ice at 0 degree celsius has a lower density than water at 4 degree celsius and hence it floats on water.

4. Chemically pure water is called distilled water.

5. Alcohol is immiscible in water whereas petrol is miscible in water.

6. Aquatic animals like fish use oxygen from the atmosphere for respiration.

Answer 1

1. false, decrease in pressure decreases the boiling point of water
2. false, Pure water has its maximum density at 100 degree celsius.
3. true
4. true
5. false, Alcohol is miscible in water whereas petrol is immiscible in water.
6. Aquatic animals like fish use oxygen from the water for respiration.

Answer 2

1) False.
Correct statement : Increase in pressure increases the boiling point of water.

2)False.
Correct statement : Pure water has its maximum density at 4 degree celsius.

3)True.

4)True.

5)False.
Correct statement : Alcohol is miscible in water whereas petrol is immiscible in water.

6)False.
Correct statement : Aquatic animals like fish use oxygen from the water bodies for respiration.