Online Chemistry Quiz

41. The chemical added to the colourless LPG cooking gas to give odour is :
(A) Chlorine
(B) Bromine
(C) Nitrogen
(D) Sulphur


42. Butane dioic acid is :
(A) malonic acid
(B) adipic acid
(C) succinic acid
(D) glutaric acid


82. Silver paper is made of :
(A) Silver
(B) Tin
(C) Platinum
(D) None of these


44. The tendency of an atom in a molecule to attract electrons of a covalent bond towards itself is called :
(A) Ionization potential
(B) Electron affinity
(C) Electro negativity
(D) Ionic bonding


81. Which metal was first used by man?
(A) Aluminium
(B) Gold
(C) Iron
(D) Brass


46. The number of ions produced from one molecule of K4FeCN5 in aqueous solution is :
(A) 4
(B) 3
(C) 5
(D) 1


47. ‘Trimethyl benzene’ is called :
(A) Pyrogallol
(B) Catechol
(C) Mesityl oxide
(D) Mesitylene


79. Which of the following laws does not relate to gases?
(A) Boyle’s law
(B) Charles’s law
(C) Gay-Lussac’s law
(D) Faradya’s law


49. Sodium thiosulphate (Hypo) is widely used in photography. Its main role in photographic process is due to :
(A) Reduction
(B) Oxidation
(C) Complex formation
(D) Photo decomposition


50. If the percentage of oxygen in a metallic oxide is 33.33%, then its equivalent mass is :
(A) 66
(B) 16
(C) 32
(D) 50


51. Bhopal gas tradedy of 1984 was caused by one of the following compounds :
(A) CO
(B) COCl2
(C) Methyl isocyanide
(D) Methyl isocyanate


52. Petroleum mainly contains :
(A) Aliphatic hydrocarbons
(B) Aromatic hydrocarbons
(C) Aliphatic alcohols
(D) None of these


53. In a chemically pure state, diamonds are :
(A) monochromatic
(B) polychromatic
(C) colourless
(D) none of these


54. Which metal has the unique tendency to readily combine with itself to form large molecules of atoms linked in long chains (rings)?
(A) Sodium
(B) Nitrogen
(C) Carbon
(D) Hydrogen


55. Gun powder is mixture of :
(A) sulphur, carbon and phosphorus
(B) sulphur, charcoal and nitre
(C) sulphur, charcoal and carbon
(D) carbon, nitrogen and chlorine


56. Which of the following is fire-resistant?
(A) asbestos
(B) gypsum
(C) dolomite
(D) none of these


78. Faraday’s law is associated with :
(A) eletrolysis
(B) reaction of gases
(C) pressure on gases
(D) temeprature and pressure


58. Which of the following metals is mostly used for qualitative analysis of organic compounds?
(A) Cu
(B) Hg
(C) Na
(D) Ca


59. Permanent hardness of water due to sulphates of metals can be destroyed by the use of :
(A) zeolites
(B) sulphonides
(C) lime
(D) nitrates


60. The chemical name of laughing gas is :
(A) nitrous oxide
(B) nitric oxide
(C) nitrogen dioxide
(D) nitrogen peroxide