Question

What do you observe when 

(a) Ice cold water is filled in a glass tumbler. 

(b) A burning candle is covered with an inverted jar. 

(c) Carbon dioxide gas is passed through lime water. 

(d) A beam of light is allowed to enter in a closed dark room through a small hole.

Answer 1

(a) We will observe that fine water droplets get deposited on the outer wall of the glass tumbler. 

(b) The candle burn more brightly because candle gets oxygen support in burning. 

(c) When CO₂ gas is passed through lime water it forms calcium carbonate which is white precipitate (turbidity). This gives the milky white appearance to the solution.