Question

(111
(iv) Nitrogen
(Lyo)
Fill in the blanks.
1. The earth is surrounded by a thick blanket of ....... (air/water)
2. Water, when poured into a glass, displaces ...... from the latter. (air/nothing)
3. Air is a gaseous ....... (compound/mixture)
4. A diver carries ...... for respiration. (nitrogen/oxygen)
5. The ...... present in air helps in the formation of clouds. (nitrogen/dust)
Write 'T' for true and 'F' for false for the following statements.
1. The oxygen-to-nitrogen proportion in air is 1:5. P
2. There is a vacuum in an empty glass.
3. Carbon dioxide turns limewater milky.
4. Anhydrous copper sulphate (white) turns blue with water. T
5. Nitrogen is combustible but not a supporter of combustion. T
6. The dust present in air helps the formation of clouds. 1​

Answer 1

Answer:

1;air

2;air

3;mixture

4;oxygen

5;nitrogen

true nd fale.

1; false

2;true

3;true

4;true

5;true

6;false.

Explanation:

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Answer 2

1) water

2) nothing

3) mixture

4)nitrogen

5)dust