Question

All alkalis are ............ but all ........... are not alkalis.

• A. acids
• B. bases
• C. acids, bases
• D. bases, acids

Answer 1

The correct option is B bases

Bases are compounds that are usually bitter to taste, turns red litmus paper blue and release hydroxyl ions $(OH{)}^{-1}$ in the solution medium which are responsible for their basicity.

Bases can be either water soluble or they can be insoluble in water.

Water soluble bases are known as alkalis, for eg. NaOH, KOH.

Therefore, we can easily conclude that, All alkalis are bases but all bases are not alkalis.

Hence, the correct answer is option (B).