Galvanization is the process of coating iron with a thin layer of: MCQ with Answer and Explanation

Explanation:
Mendeleev arranged elements in order of increasing atomic mass, grouping those with similar properties. He left gaps for undiscovered elements. Modern table uses atomic number.

Explanation:
Boiling water changes state from liquid to gas, but the chemical composition (H₂O) remains unchanged – physical change. Others form new substances.

Explanation:
Concrete is a mixture of cement, fine aggregate (sand), coarse aggregate (gravel/crushed stone), and water. Mortar is cement + sand + water (no coarse aggregate). Plaster is cement/sand with water for coating walls. Asphalt is bitumen + aggregate. Concrete is strong in compression, used in buildings, bridges.