Question

Write your observation and conclude:
a) A crystal of iodine heated slowly in a closed flask.

c) When a piece of quick lime is put into a beaker containing water.

e) When zinc granules are added to a test tube containing hydrochloric acid.
f) Saw dust is put into a glass of water.​

Answer 1

Answer:

1. The iodine crystals get converted into gaseous state from solid state when they are heated. Gases have a property to fill a container completely, So the iodine vapour fills the container completel. The iodine crystals evaporate when you heat them.So the iodine vapours formed fill completely the vessel.
2. When we add water to the quick lime, a slaked lime kind of suspension is formed. While touching the beaker, we feel the heat. ... On blowing the exhaled air, carbon dioxide reacts with the clear solution and the lime water turns milky.
3. When Zinc (Zn) metal added in Hydrochloride acid HCl. in this above reaction ZnSO4 is salt. Now we will check hydrogen gas will release or not. When a burning candle near the solution so pop sound we listen so hydrogen gas is released.
4. If a spoonful of sugar,sawdust and soil are added to a glass of water,then after stirring,sugar will get dissolved into water.