General Science - Chemistry

61. Choose the correct about Phenolphthalein as an indicator?
[A] It turns red in acids and yellow in bases
[B] It turns colourless in acids and pink in bases
[C] It turns orange in acids and brown in bases
[D] It turns colourless in acids and green in bases

Show Answer

62. What do we call the device which uses electrical energy to carry non-spontaneous chemical reactions?
[A] Voltaic cell
[B] Galvanic cell
[C] Daniel cell
[D] Electrolytic cell

Show Answer

63. Where does the oxidation takes place in a Galvanic cell?
[A] Anode
[B] Cathode
[C] Oxidation does not take place
[D] None of the above

Show Answer

64. Which of the following is the formula of cell constant?
[A] length/2 x Area
[B] length/Area
[C] 2 x length/Area
[D] length x Area

Show Answer

65. What is the S.I unit of Molar conductivity?
[A] S m3 mol-2
[B] S m2 mol-2
[C] S m-1 mol2
[D] S m2 mol-1

Show Answer

66. What do we call the molar conductivity when the concentration approaches zero?
[A] Reacting molar conductivity
[B] Zero level molar conductivity
[C] Limiting molar conductivity
[D] Ideal molar conductivity

Show Answer

67. Which of the following is not a weak electrolyte?
[A] Acetic acid
[B] Carbonic acid
[C] Potassium Hydroxide
[D] All of the above

Show Answer

68. As per Faraday’s Laws of Electrolysis, the amount of chemical reaction which occurs at any electrode during electrolysis proportional to which of the following?
[A] the concentration of electrolyte
[B] length of the electrode
[C] quantity of electricity passed through the electrolyte
[D] All of the above

Show Answer

69. What is the reason for the presence of the vast number of organic compounds in nature?
[A] Carbon exists in free state
[B] Catenation property of carbon
[C] Low atomic mass of carbon
[D] None of the above

Show Answer

70. Choose the correct about Methane:
[A] It is an unsaturated hydrocarbon
[B] Refined liquid methane is used as a rocket fuel.
[C] Its chemical formula is C2H6
[D] All of the above

Show Answer

Advertisement

Kindly help us to keep GKToday updated and error free. Use this form to report error or outdated information in questions. We shall rectify asap...