Physical & Chemical Changes

Change of water into the vapour is called –

Which of the following is NOT correctly matched?

Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R). Assertion (A): A solution of table salt in a glass of water is homogeneous. Reason (R): A solution having different compositions throughout is homogeneous. Select the correct answer from the code given below : Code :

Give a thought to these statements : Statement (A): Temperature below $0^{\circ}\mathrm{C}$ is achieved by the mixture of salt and ice. Reason (R) : Salt increases the freezing point of ice. In the context of above statements which one of the following is correct:

Milk is an example of:

Which of these is not a colloid :

If an unsaturated sugar solution is prepared by mixing 100 grams of sugar with half litre of water, which of the following physical quantities will not change?

Consider the following statements with reference to osmosis : 691 <!-- PAGE 691 --> (1) If the semipermeable membrane is placed between the solvent and solution, the solvent molecules will flow through the membrane from pure solvent to the solution. (2) The process of flow of solvent is called as reverse osmosis. Select the correct answer using the code given below :

Which one of the following processes is NOT useful for purification of solid impurities?

A sample of any of the following substances disappears after sometime when exposed to air like camphor, naphthalene or dry ice. This phenomenon is called :

After cutting cucumber if salt is added, then water comes out due to :