1. The most reactive metal is:
(A) Iron
(B) Gold
(C) Zinc
(D) Potassium
2. The liquid metal at room temperature is:
(A) Gold
(B) Bromine
(C) Sodium
(D) Mercury
3. Non-metals are:
(A) Generally liquids
(B) Generally gases
(C) Generally gases and liquids
(D) Generally solids and gases
4. The metal which is stored in kerosene is:
(A) Sodium
(B) Magnesium
(C) Phosphorus
(D) Calcium
5. The non-metal which is liquid at room temperature is:
(A) Carbon
(B) Iodine
(C) Chlorine
(D) Bromine
6. Materials around us can be classified into:
(A) Elements and compounds
(B) Metals and non-metals
(C) Acids and bases
(D) None of these
7. All metals are solids except:
(A) Sodium
(B) Calcium
(C) Hydrogen
(D) Mercury
8. Metal oxides are of nature:
(A) Basic
(B) Acidic
(C) Neutral
(D) All of these
9. The metal which can be cut with a knife is:
(A) Potassium and calcium
(B) Barium and calcium
(C) Sodium and mercury
(D) Sodium and potassium
10. When non-metals react with water then:
(A) Non-metals do not react with water
(B) Carbon dioxide gas is formed
(C) Hydrogen gas is formed
(D) None of these
11. Property of metal by which it can be drawn into wires is called:
(A) Ductility
(B) Malleability
(C) Sonority
(D) Lustre
12. Property by which metals can be beaten into sheets is:
(A) Sonority
(B) Lustre
(C) Ductility
(D) Malleability
13. Property that makes metals shine is called:
(A) Sonority
(B) Malleability
(C) Lustre
(D) Ductility
14. Which of the following is a non-metal but is lustrous?
(A) Iodine
(B) Mercury
(C) Carbon
(D) Fluorine
15. Which of the following metals catch fire on reaction with air?
(A) Magnesium
(B) Manganese
(C) Potassium
(D) Calcium
16. Which of the following metals does not react even with steam?
(A) Sodium
(B) Iron
(C) Calcium
(D) Silver
17. When sulphur reacts with oxygen, the oxide formed is ___ in nature:
(A) Alkaline
(B) Neutral
(C) Basic
(D) Acidic
18. Those minerals in which quantity of metal is higher are called:
(A) Ores
(B) Gangue
(C) Flux
(D) Slag
19. Purification of ores takes place by:
(A) All of these
(B) Froth floatation
(C) Gravity separation
(D) Pulverization
20. Impurities present in ores are called:
(A) Gangue
(B) Ores
(C) Minerals
(D) Flux