Chemistry Class 10th

61. When the ratio is less than Kc :

A ) The System is at equilibrium

B) The System is not at Equilibrium, more reactants are needed

C) The System is not at Equilibrium, more products are needed

D) None of the above

62. When ratio is less than Kc, the direction of the reaction shall be:

A) Forward

B) Reverse

C) At Both Sides

D)Stopped

63. When the ratio of is greater than KC:

A ) The System is at equilibrium

B) The System is not at Equilibrium, more reactants are needed

C) The System is not at Equilibrium, more products are needed

D) None of the above

64. When ratio is greater than Kc, the direction of the reaction shall be:

A) Forward

B) Reverse

C) At Both Sides

D)Stopped

65. When the ratio is equal to Kc :

A ) The System is at equilibrium

B) The System is not at Equilibrium, more reactants are needed

C) The System is not at Equilibrium, more products are needed

D) None of the above

66. When ratio is equal to Kc, the direction of the reaction shall be:

A) Forward

B) Reverse

C) At Both Sides

D)Stopped

67. When the concentration of [A] and [B] is greater and the concentration of [C] and [D] is lesser than

A) The Amount of Reactants is greater than the product

B) The amount of product is greater than the Reactant

C) Both are equal

D) Both are negligible

68. When the concentration of [A] and [B] is lesser and the concentration of [C] and [D] is greater than,

A) The Amount of Reactants is greater than the product

B) The amount of product is greater than the Reactant

C) Both are equal

D) Both are negligible

69. At dynamic equilibrium:

A) The Reverse reaction stops

B) The Forward reaction stops

C)Both reactions stop

D) Both Reactions continue at same rate

70. A reversible reaction have following characteristics except:

A) They proceed in both directions

B) They never complete

C) Products do not form reactants again

D) They are represented by double arrow

71. The Equilibrium constant is:

A) The sum of the two reactants

B) The difference of the two reactants

C) The ratio of two rate constants

D) The Product of the two constants

72. When the value of Kc is small, it shows that

A) reaction shall go in forward direction

B) Reaction shall go in reverse direction

C) Reaction shall be at equilibrium

D) Equilibrium shall never happen

73. When the value of Kc is large:

A) Reaction is at equilibrium

B) Equilibrium shall never be achieved

C) Reaction shall move in forward direction

D) Reaction shall happen in reverse direction

74. Active Mass means

A) The total mass of the reactants

B) The Total mass of the products

C) The Total mass of the products and reactants

D) Concentration of reactants and products in mole per dm3 in a dilute solution

75. Berzellus was a ________ chemist

A) Polish

B) Swedish

C) Irish

D) English

76. The Vital Force Theory was presented in the year of:

A) 1800

B) 1824

C) 1815

D) 1852

77. The Vital Force Theory was presented by:

A) Archimedes

B) Avogadro

C) Berzellius

D) None of the above

78. Vital forces are necessary for the synthesis of :

A) Organic Compounds

B) Inorganic Compounds

C) Fatty Acids

D) All Matter

79. The branch concerned with the study of organic compounds:

A) Inorganic Chemistry

B) Organic Chemistry

C) Analytical chemistry

D) Industrial Chemistry

80. Which of the following is not studied in the branch of Organic Chemistry:

A) Oxides of Carbon

B) Carbonates

C) Bicarbonates

D) All of the above