Question

c. Write T for true and F for false statements.
1. Tomato contains about 90% water. ___
2. Water is used in the radiators of vehicles to keep their engine cool . ___
3. Lake and ponds get their water from the groundwater.___
4. Water in the oceans and seas has large amount of salts dissolved in it.___
5. The tiny droplets of water on condensation form clouds in the sky.___
6. The water that looks transparent and is odourless is fit for drinking.__
7. We should not use more chlorine tablets than specified.___
8. Alcohol is also used as a solvent in some solutions.___
9. Water can dissolve any amount of a substance in it.___
10. Water of rivers and lakes polluted with pesticides and fertilizers can kill aquatic animals.__
11. Fertilizers and pesticides should not be used in excessive amount.__
12. Leaving the tap running while brushing the teeth may waste several litres of water.___​

Answer 1

Explanation:

False; Stone is opaque, while the glass is transparent.

(ii) False; Neither notebook nor eraser has luster (Shining surface). They both are non-lustrous.

(iii) False; Chalk is insoluble in water.

(iv) True

(v) False; Sugar is completely soluble in water.

(vi) False; Oil is immiscible in water. It forms a separate layer on the surface of the water.

(vii) True

(viii) True

Answer 2

tomato contains about 90% water true a false