Question

Give reasons


i) A drop of ink added to water in a glass turns the whole water blue.

ii) Why burning candle shows both physical and chemical changes.​

Answer 1

Answer:

1) because water is a soluble substance and it takes the shape and colour of the substance it is added to

2) A burning candle produces wax vapours which solidify and form wax again is physical change. At the same time wax on burning produces water vapours and carbondioxide which escape into the atmosphere which are new substances with new properties. ... Hence burning of candle shows both physical and chemcial changes ....

Answer 2

Answer:

1st ) When a drop of ink added into the water gradually moves in the whole quantity of water due to this entire water turns into blue color. This is nothing but the diffusion of ink particles into the water molecules. This is because water, as well as ink molecules, are in random motion due to the motion of ink substance.

2nd ) A burning candle produces wax vapours which solidify and form wax again is physical change. At the same time wax on burning produces water vapours and carbondioxide which escape into the atmosphere which are new substances with new properties. ... Hence burning of candle shows both physical and chemcial changes ...

Explanation:

Actually this answers are there in books

why you all put sili questions I don't understand