General Studies - Science Objective Question and Answer

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