Question : Which of the following chemicals is used as rodenticide?
Option 1: Copper sulphate
Option 2: Zinc sulphide
Option 3: Iron sulphate
Option 4: None of these
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Correct Answer: Zinc sulphide
Solution : The correct answer is Zinc sulphide.
Rodenticides are chemicals that are manufactured and sold for killing rodents. Iron sulphate, copper sulphate, thallium, sodium monofluoroacetate (fluoroacetate), strychnine, zinc phosphide, aluminium phosphide, elemental phosphorus, arsenic, and barium carbonate are examples of rodenticides.
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Question : Which of the following is a macromineral needed in large amounts by the human body?
Option 1: Iron
Option 2: Zinc
Option 3: Iodine
Option 4: Phosphorus
Question : What is the main constituent of the human bone?
Option 1: Phosphorus
Option 2: Calcium
Option 3: Zinc
Option 4: Iron
Question : Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives
Option 1: copper at the cathode, and oxygen at the anode
Option 2: copper at the anode, and oxygen at the cathode
Option 3: copper at the cathode, and anodes dissolve to give copper
Option 4: hydrogen at the cathode, and oxygen at the anode
Question : Bauxite is an alloy of which of the following metals?
Option 1: Aluminium
Option 2: Silver
Option 3: Tin
Question : Which of the following methods is suitable for preventing an iron frying pan from rusting?
I. Applying grease
II. Applying paint
III. Applying a coating of zinc
IV. All of these
Option 1: I
Option 2: II
Option 3: III
Option 4: IV
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