Important genral science questions for ssc cgl,Chemistry related important General Knowledge questions,Chemistry important questions and answers, Chemistry questions and answers for IAS, RAS, CDS and SSC CGLThis questions are useful for any competitive exam like IAS, bank PO, SSC CGL, RAS, CDS, UPSC exams and all state related exams.Chemistry related important General Knowledge questions | very important chemistry questions and answers
51. Chloro-fluro-carbon gases are not used in which of the following?
A. aerosol sprays
B. fire-extinguishers
C. refrigerators
D. air-conditioning
52. Among the following elements, which one is not present in a pure sugar?
A. Carbon
B. hydrogen
C. Nitrogen
D. oxygen
53. Which one of the following has the highest fuel value?
A. hydrogen
B. charcoal
C. natural gas
D. gasoline
54. Retinol is the chemical name of
A. Vitamin A
B. Vitamin E
C. Vitamin D
D. Vitamin K
55. The substance used in the manufacture of high voltage insulators is
A. Silicons
B. Natural rubber
C. Silicon carbide
D. Artificial rubber
56. What is the chemical name of Green vitriol?
A. Calcium phosphate
B. Calcium carbonate
C. Iron sulphate
D. Calcium cyanamide
57. The chemical name of laughing gas is
A. Nitrous oxide
B. Nitric oxide
C. Nitrogen dioxide
D. Nitrogen peroxide
58. What is the first element of periodic table?
A. Sodium
B. Helium
C. Neon
D. Hydrogen
59. Which among the following is in liquid state at normal room temperature?
A. Sodium
B. Mercury
C. Copper
D. Phosphorous
60. The chemical name of quartz is
A. Sodium silicate
B. Sodium phosphate
C. Calicum phosphate
D. Calcium oxide
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