Chemistry Question Answer
Q46. Which one is the simplest aromatic hydrocarbon
(a) Aspirin
(b) Benzene
(c) Chloride
(d) Picric acid
Answer: (b) Benzene
Q47. Which color is produce by Arsenic during flame test
(a) Green
(b) Red
(c) Crimson
(d) Blue
Answer: (d) Blue
Q48. How many atoms of oxygen are in a glucose molecule
(a) 3
(b) 4
(c) 6
(d) 10
Answer: (c) 6
Q49. In a Carbonyl group a carbon atom makes double bond with
(a) Carbon
(b) Oxygen
(c) Hydrogen
(d) None of the above
Answer: (b) Oxygen
Q50. The length of double bond is _______ than single bond
(a) Shorter
(b) Longer
(c) Of same lenght
(d) None of the above
Answer: (a) Shorter
Q51. Which one is not a primary greenhouse gases in the Earth's atmosphere
(a) Carbon dioxide
(b) Methane
(c) Nitrogen
(d) Ozone
Answer: (c) Nitrogen
Q52. Which of the following has a fundamental unit only
(a) Time
(b) Force
(c) Volume
(d) Velocity
Answer: (a) Time
Q53. Potassium is extracted by the electrolysis of
(a) KCI
(b) KBr
(c) fused KOH
(d) None of the above
Answer: (c) fused KOH
Q54. The metal ion present in Vitamin B12 is
(a) Nickel
(b) Cobalt
(c) Iron
(d) Zinc
Answer: (b) Cobalt
Q55. Molten sodium chloride conducts electricity due to the presence of
(a) free ions
(b) free atoms
(c) free electrons
(d) free molecules
Answer: (a) free ions
Q56. Peptization is a process of
(a) precipitation of colloidal particles
(b) purification of colloids
(c) protection of colloidal solution
(d) dispersing precipitates into colloidal solution
Answer: (d) dispersing precipitates into colloidal solution
Q57. Neoprene is a polymer of
(a) Chloroprene
(b) Isoprene
(c) Isobutane
(d) Isopentane
Answer: (a) Chloroprene
Q58. The influence of temperature on reaction rate is predicted by
(a) van der Waals equation
(b) Kirchhoff's equation
(c) Arrhenius equation
(d) Lewis equation
Answer: (c) Arrhenius equation
Q59. The minimum energy required for an effective collision is
(a) Threshold energy
(b) Activation energy
(c) Free energy
(d) Internal energy
Answer: (b) Activation energy
Q60. Entropy of Universe is always
(a) Decreasing
(b) Zero
(c) Constant
(d) Increasing
Answer: (d) Increasing