pH of salts

Q.

Why do $\mathrm{HCl},{\mathrm{HNO}}_3,\mathrm{etc}$.show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character?

Q. Basic salts are formed by neutralisation of

1. Strong acid and strong base
2. Strong acid and weak base
3. Weak acid and weak base
4. Strong base and weak acid

Q.

If pH of solution X is 6 and pH of solution Y is 13.

What is formed when X and Y are reacted with each other?

1. Acidic salt

2. Neutral salt

3. Basic salt

4. Salt is not formed