16. Chocolate contains Lead and.......
26. The process used in dairies to separate cream from milk is:
(a) Aluminium (b) Silver
(c) Cobalt (d) Nickel
Answer: (d )
17. Bauxite is the ore of:
(a) Barium (b) Iron
(c) Aluminium (d) Copper
Answer: (c )
18. Vanaspathi is prepared by passing .......through vegitable
oil:
(a) Helium (b) Nitrogen
(c) Hydrogen (d) Carbon
Answer: (c )
19. Endosulfan is a :
(a) Insecticide (b) Hallucinogen
(c) Medicine (d) Beverage
Answer: (a)
20. The chemical name of Common Salt?
(a) Sodium Chloride (b) Calcium Chloride
(c) Potassium Chloride (d) Ferrous Sulphate
Answer: (a )
21. The first Trans Uranic element:
(a) Plutonium (b) Neptunium
(c) Einsteinium (d) Fermium
Answer: ( b)
22. Most chemically reactive element?
(a) Hydrogen (b) Oxygen
(c) Carbon (d) Flourine
Answer: ( d)
23. Heavy water is used in:
(a) Nuclear reactors (b) Aqua lungs
(c) Quartz clocks (d) Jet engines
Answer: ( a)
24. Sodium imparts ..... colour to flames:
(a) Red (b) Green (c)
Yellow (d) Blue
Answer: ( c)
25. If the pH value of a substance is below 7 , it is:
(a) Acid (b) Base
(c) Neutral (d) Water
Answer: (a )
26. The process used in dairies to separate cream from milk is:
(a)Centrifugation (b) Sedimentation
(c) Filtration (d) Sublimation
Answer: (a)
27. Which of the following is not present in pure sugar?
(a)Carbon (b) Hydrogen (c) Oxygen (d) Nitrogen
Answer: (d)
28. Phosphorus finds important use in _____ industry.
(a)Soap (b) Fertilizer (c) Paper (d) Sugar
Answer: (b)
29. Radio Carbon dating was discovered by:
(a)Willard Franck Libby (b) Madam Curie
(c) Henri Bequerel (d) Pierrie Curie
Answer: (a)
30. Development of unpleasant smell and taste in oil and fat containing food items due to oxidation of atmospheric oxygen is called:
(a)Radio activity (b) Turbidity (c) Acidity (d) Rancidity
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