Page 369 - General Knowledge

GENERAL KNOWLEDGE 2019

39. Which among the following makes Chile saltpetre different from saltpetre?
A. Nitrate
B. Sodium
C. Magnesium
D. Calcium

40. Which among the following is ―Fool‘s Gold‖ ?
A. Copper Sulphate
B. Iron Sulfide
C. Brass
D. Silver Bromide

41. When a piece of quicklime is dipped in water, it gives bubbles. This bubbling is due to
which of the following?
A. Oxygen
B. Carbon Dioxide
C. Water Vapour
D. Hydrogen

42. Which among the following acid is used to ascertain, whether pure Ghee has been
adulterated with Vanaspati or Margarine?
A. Sulphuric Acid
B. Nitric Acid
C. Hydrochloric Acid
D. Boric Acid

43. Mizoroki-Heck reaction is catalyzed by which of the following metals?
A. Rhodium
B. Sodium
C. Palladium
D. Osmium

44. Which among the following is used in preparing windows for X-Ray Tubes ?
A. Barium
B. Beryllium
C. Magnesium
D. Calcium

45. Which among the following first increases than decreases in a Period of a periodic table?
A. metallic property
B. Chemical Reactiveness
C. Valency
D. Electron affinity

46. Which among the following were not discovered by the time , Mendeleev published his
periodic table?

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