Tuesday, 29 December 2015

General Science Chemistry-2

16. Chocolate contains Lead and.......
(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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