Question

We can get the smell of perfume sitting several meters away. Give reason.

Jatin added a crystal of copper sulphate (CuSO4) in a beaker filled with water and left it to settle at the bottom. After sometime he observed that the blue colour appears just above the solid crystal and with the passage of time whole water in beaker turns blue.

When a cell is placed in a medium, and it increases in size, then the external medium is:

Alex conducts an experiment with a de-shelled egg by placing it first in pure water and then in a concentrated salt solution. What will be the observations in each condition?