A ⟶ A⁺³; B ⟶ B^-1
Number of electrons present in the outermost shell of atoms A and B respectively are:

1. 5, 1
2. 3, 1
3. 3, 7
4. 5, 7

A …………… solution is observed after placing Magnesium metal in a solution of Copper sulphate for half an hour.

1. Blue
2. Colourless
3. Reddish brown
4. Dirty green

Which of the following is NOT true with respect to nitric acid?

1. It is a strong reducing agent
2. It is a strong oxidizing agent
3. It is unstable to heat
4. It liberates sulphur dioxide gas when treated with potassium sulphite

……………. is the functional group in methanol.

1. >C=O
2. –OH
3. –CHO
4. –COOH