Question

what name is given to those substances which do not change their colour​

Answer 1

Answer:

Name those substances. The solutions which do not change the colour of either red or blue litmus are known as neutral solutions. These substances are neither acidic nor basic. Take a tablespoonful of turmeric powder.

Explanation:

hope you understand

Answer 2

Answer:

This is called sublimation. One example is dry ice (solid carbon dioxide), and second is iodine. Both of these change from solid state to gaseous state on heating. Other materials commonly used include napthalene and camphor