1. Which of the following is a non-metal that remains liquid in room temperature ?
(A) Bromine
(B) Chlorine
(C) Helium
(D) Phosphorus
2. Which of the following is used as a material for making protective windows in space probes ?
(A) Diamond A
(B) Graphite
(C) Tungsten
(D) Steel
3. Air is a/an
(A) Compound
(B) Element
(C) Mixture
(D) Electrolyte
4. The charcoal used to decolourise raw sugar is____
(A) Animal charcoal
(B) Sugar charcoal
(C) Cocoanut charcoal
(D) Wood charcoal
5. The gas used to extinguish fire is_____
(A) Neon
(B) Nitrogen
(C) Carbon Monoxide
(D) Carbon dioxide
6. An alloy used in making heating elements for electric heating devices is _____
(A) Solder
(B) Alloysteel
(C) Nichrome
(D) German Silver
7. Which of the following is the lightest metal ?
(A) Mercury
(B) Silver
(C) Lithium
(D) Lead
8. Stainless steel is an alloy of —
(A) Iron, Carbon and Nickel
(B) Iron and Manganese
(C) Iron, Chromium and Zinc
(D) Iron, Chromium and Nickel
9. German Silver is an alloy of _____
(A) Copper, Silver & Nickel
(B) Silver, Copper & Aluminium
(C) Zinc, Copper & Nickel
(D) Silver, Zinc & Nickel
10. Tetra-ethyl lead is used as_____
(A) Mosquito repellent
(B) Pain Killer
(C) Fire extinguisher
(D) Petrol additive
11. In which of the following activities Silicon Carbide is used ?
(A) Making cement and glass
(B) Disinfecting water and ponds
(C) Making castes for statues
(D) Cutting very hard substances A
12. Gobar gas contains mainly ___
(A) Methane
(B) Carbon dioxide
(C) Butane
(D) Carbon Monoxide
13. The most important ore of Aluminium is____
(A) Bauxite
(B) Calamine
(C) Calcite
(D) Galena
14. The element present in the largest amount in rocks and minerals is____
(A) Carbon
(B) Silicon
(C) Hydrogen
(D) Aluminium
15. The most malleable metal is __
(A) Silver
(B) Gold
(C) Aluminium
(D) Sodium
(A) Bromine
(B) Chlorine
(C) Helium
(D) Phosphorus
2. Which of the following is used as a material for making protective windows in space probes ?
(A) Diamond A
(B) Graphite
(C) Tungsten
(D) Steel
3. Air is a/an
(A) Compound
(B) Element
(C) Mixture
(D) Electrolyte
4. The charcoal used to decolourise raw sugar is____
(A) Animal charcoal
(B) Sugar charcoal
(C) Cocoanut charcoal
(D) Wood charcoal
5. The gas used to extinguish fire is_____
(A) Neon
(B) Nitrogen
(C) Carbon Monoxide
(D) Carbon dioxide
6. An alloy used in making heating elements for electric heating devices is _____
(A) Solder
(B) Alloysteel
(C) Nichrome
(D) German Silver
7. Which of the following is the lightest metal ?
(A) Mercury
(B) Silver
(C) Lithium
(D) Lead
8. Stainless steel is an alloy of —
(A) Iron, Carbon and Nickel
(B) Iron and Manganese
(C) Iron, Chromium and Zinc
(D) Iron, Chromium and Nickel
9. German Silver is an alloy of _____
(A) Copper, Silver & Nickel
(B) Silver, Copper & Aluminium
(C) Zinc, Copper & Nickel
(D) Silver, Zinc & Nickel
10. Tetra-ethyl lead is used as_____
(A) Mosquito repellent
(B) Pain Killer
(C) Fire extinguisher
(D) Petrol additive
11. In which of the following activities Silicon Carbide is used ?
(A) Making cement and glass
(B) Disinfecting water and ponds
(C) Making castes for statues
(D) Cutting very hard substances A
12. Gobar gas contains mainly ___
(A) Methane
(B) Carbon dioxide
(C) Butane
(D) Carbon Monoxide
13. The most important ore of Aluminium is____
(A) Bauxite
(B) Calamine
(C) Calcite
(D) Galena
14. The element present in the largest amount in rocks and minerals is____
(A) Carbon
(B) Silicon
(C) Hydrogen
(D) Aluminium
15. The most malleable metal is __
(A) Silver
(B) Gold
(C) Aluminium
(D) Sodium
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