1. Which of the following is the lightest metal ? (3)
(A) Mercury
(B) Silver
(C) Lithium
(D) Lead
2. The most important ore of Aluminium is– (1)
(A) Bauxite
(B) Calamine
(C) Calcite
(D) Galena
3. The element present in the largest amount in rocks and minerals is– (2)
(A) Carbon
(B) Silicon
(C) Hydrogen
(D) Aluminium
4. The chemial name of Uria is– (3)
(A) Aneurin
(B) Chloroetane
(C) Carbamide
(D) None of these
5. Permanent hardness of water can be removed by adding– (4)
(A) Potassium Permanganate
(B) Chlorine
(C) Bleaching Powder
(D) Washing Soda
