Question

There are four metals K, L, M and N Shows following properties (i) K is a noble metal. (ii) L forms amphoteric oxide. (iii) Oxide of M dissolves in water to form alkali (iv) N does not react with cold or hot water Identify the metals K,L,M and N

Answer 1

Answer:

N - Iron

K - gold

L - Zinc

M - Magnesium

Answer 2

Answer:

The metals K, L, M, and N are -

K - K, L - Cu, M - Pb, N - Na.

Explanation

OXIDES -

• The compounds contain one or more oxygen with the other elements.
• The oxides can be classified as acidic, basic, or amphoteric based on their acid-base nature.
• The oxide that reacts with water to form acids is known as acidic oxide whereas if the base is formed it is known as basic oxide.
• Some oxides can be either neutral or amphoteric in nature.
• Basic oxides or acid anhydrides are usually formed by non-metals.
• Acidic oxides or basic anhydrides are usually formed by metallic elements.
• Neutral oxide does not react with acid or base to form salt and water.

K - BASIC OXIDE - METAL - POTASSIUM

L - AMPHOTERIC OXIDE - COPPER

M - METAL OXIDE - LEAD

N - NEUTRAL OXIDE - SODIUM