_____ is used to separate common salt dissolved in water?

Match Column I with Column II and select the correct answer using the codes given below:

Codes:
A  B C  D

Consider the following table:

A, B and C in the given table are:

Which of the following is/are true when milk changes into curd?

1. It changes color.
2. The change cannot be reversed.
3. It changes the taste.
4. Its state is changed from liquid to semi-solid.

Choose the correct option from below:

Read the following statements.
1. Gases are soluble in liquids as well as in solids.
2. Gases which form ions in the solvent are soluble in that solvent.
3. Gases which can be liquefied easily are more soluble in water than the other gases which are not liquefied easily. 
Which of the statement(s) given above is/are correct?

You have three test tubes, $X$, $Y$ and $Z$, half-filled with different solutions. $X$ is filled with sodium chloride solution, $Y$ is filled with sodium hydroxide solution and $Z$ is filled with dilute hydrochloric acid. On adding one drop of phenolphthalein solution to each of the above solutions, you would observe the solutions in the test tubes as _____.