1. PVC is obtained by the Polymerisation of?
(A) propane
(A) propane
(B) vinyl chloride
(C) styrene
(C) styrene
(D) Acetylene
(Answer : B)
(A) Hard glass
(A) An exothermic process
(A) Calcium Carbonate
2. The gas used to extinguish fire is?
(A) Neon
(B) Nitrogen
(C) Carbon dioxide
(C) Carbon dioxide
(D) Carbon Monoxide
(Answer : C)
3. The process by which an organic compound breaks down into simpler compounds on heating to high temperature is known as?
(A) Aromatisation
(B) Polymerisation
(C) Pyrolysis
(C) Pyrolysis
D) Reduction
(Answer : C)
4. Cotton fibers are made of?
4. Cotton fibers are made of?
(A) cellulose
(B) starch
(C) proteins
(C) proteins
(D) fats
(Answer : A)
5. Which variety of glass is heat resistant?
5. Which variety of glass is heat resistant?
(A) Hard glass
(B) Flint glass
(C) Pyrex glass
(C) Pyrex glass
(D) Bottle glass
(Answer : C)
6.Which of the following is used for removing air bubbles from glass during its manufacture ?
6.Which of the following is used for removing air bubbles from glass during its manufacture ?
(A) Fledspar
(B) Arsenic oxide
(C) Potassium Carbonate
(C) Potassium Carbonate
(D) Soda Ash
(Answer : B)
7. In which following processes light energy is converted into chemical energy?
7. In which following processes light energy is converted into chemical energy?
(A) Respiration
(B) Fermentation
(C) Photosynthesis
(C) Photosynthesis
(D) Photorespiration
(Answer : C)
8. Photosynthesis is?
8. Photosynthesis is?
(A) An exothermic process
(B) An endothermic process
(C) A neutral process
(C) A neutral process
(D) A thermostatic process
(Answer : B)
9. Brass is an alloy of?
9. Brass is an alloy of?
(A) Nickel and Copper
(B) Copper and Silver
(C) Nickel and Zinc
(C) Nickel and Zinc
(D) Zinc and Copper
(Answer : D)
10. Ethyl-alcohol is mixed completely with water. How ethyl alcohol is separated from the mixture ?
10. Ethyl-alcohol is mixed completely with water. How ethyl alcohol is separated from the mixture ?
(A) by separation flannel
(B) by evaporation
(C) partial-distillation
(C) partial-distillation
(D) evaporation of water
(Answer : C)
11. Washing soda is the common name of?
11. Washing soda is the common name of?
(A) Calcium Carbonate
(B) Calcium Bi-Carbonate
(C) Sodium Carbonate
(C) Sodium Carbonate
(D) Sodium Bi-Carbonate
(Answer : C)
12. Bleaching powder is made from?
12. Bleaching powder is made from?
(A) Sulphur dioxide and gypsum
(B) Chlorine and Charcoal
(C) Soda ash and lime
(C) Soda ash and lime
(D) Lime and Chlorine
(Answer : D)
13. The most abundant metal in the earth’s crust is?
13. The most abundant metal in the earth’s crust is?
(A) Zinc
(B) Copper
(C) Aluminium
(C) Aluminium
(D) Iron
(Answer : C)
14. Long distance photography is facilitated by?
14. Long distance photography is facilitated by?
(A) Visible light
(B) X-rays
(C) Infra Red rays
(C) Infra Red rays
(D) Ultra violet rays
(Answer : C)
15. The chemical used as a fixer in photography is–(A) Borax (B) Sodium thiosulphate
(C) Sodium Sulphate (D) Ammonium persulphate (Ans : B)
16. 9. Monazite is an ore of–
(A) Sodium (B) Titanium
(C) Thorium (D) Zirconium (Ans : C)
17. 5. The filament of electric bulb is made of–
(A) Iron (B) Nichrome
(C) Tungsten (D) Graphite (Ans : C)
18. 12. Which of the following ores does not contain iron?(A) Haematite (B) Magnetite
(C) Limonite (D) Cassiterite (Ans : D)
19. 16. Polythene is industrially prepared by the polymerization of–(A) Methane (B) Styrene
(C) Acetylene (D) Ethylene (Ans : D)
20. 5. Carborandum is–(A) Silicon Dioxide (B) Silicon Carbide
(C) Silicon Nitride (D) Silicon Phosphide (Ans : B)
15. The chemical used as a fixer in photography is–(A) Borax (B) Sodium thiosulphate
(C) Sodium Sulphate (D) Ammonium persulphate (Ans : B)
16. 9. Monazite is an ore of–
(A) Sodium (B) Titanium
(C) Thorium (D) Zirconium (Ans : C)
17. 5. The filament of electric bulb is made of–
(A) Iron (B) Nichrome
(C) Tungsten (D) Graphite (Ans : C)
18. 12. Which of the following ores does not contain iron?(A) Haematite (B) Magnetite
(C) Limonite (D) Cassiterite (Ans : D)
19. 16. Polythene is industrially prepared by the polymerization of–(A) Methane (B) Styrene
(C) Acetylene (D) Ethylene (Ans : D)
20. 5. Carborandum is–(A) Silicon Dioxide (B) Silicon Carbide
(C) Silicon Nitride (D) Silicon Phosphide (Ans : B)