Question

Compounds are classified as acids, bases and salts on the basis of:

• A. physical properties
• B. chemical properties
• C. both $A$ and $B$
• D. none of the above

Answer 1

Answer: (C)

both $A$ and $B$

Compounds which are sour in taste are known as acid and if slippery then known own as base but salts are neither sour nor slippery in taste

For example :-

$C{H}_{3}COOH,HCl$ - Sour in taste

$NaOH,KOH$ - Slippery in nature

$NaCl,N{a}_{2}C{O}_3$ - Neither sour nor slippery

Acids change blue litmus into red.

Base change red litmus into blue.

Salt does not shows my effect on litmus paper.

Chemically all these also differ from each other.

For example acid reacts with metal and base react easily with non-metals.

$2HCl+Zn\to ZnC{l}_2+H_2$

Acid

$6NaOH+4s\to 2N{a}_{2}S+N{a}_2{S}_2{O}_3+3H_{2}O$

Base

Salt does not react with both metal or non-metals.
Option C is correct.