Chemistry MCQS

81. Which of the following chemicals is used for fruit ripening?
A. Calcium Carbide
B. Sodium Chloride
C. Potassium Chloride
D. None of the above

82. Which of the following has the least mass?
A) Electron
B) Neutron
C) Proton
D) None of these

83. Muscle stiffness is caused by the disease:
A) Tetanus
B) Rabies
C) Polio
D) Rickets

84. Blood clotting factor in a human body is produced by the:
(A) Hemoglobin
B) White blood cells
C) Platelets
D) Cytoplasm

85. Cod liver oil contains:
(A) Vitamin C
B) Vitamin E
C) Vitamin K
D) Vitamin D

86. Diamond is a very expensive ornament. It is made up of:
A) Silver
B) Gold
C) Carbon
D) Aluminum

87. Which metal gives a golden yellow flame on burning in air?
A) Calcium
B) Sodium
C) Iron
D) Magnesium

88. Formation of water from hydrogen and oxygen is called which type of reaction?
A) Redox chemical reaction
B) Acid-Base chemical reaction
C) Neutralization
D) Combustion

89. Spontaneous chemical reaction takes place in?
A) Electrolytic cell
B) Galvanic cell
C) Nelson cell
D) Downs cell

90. Solution contains more water?
A) 0.5 M
B) 1 M
C) 2 M
D) 0.25 M