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Chemistry

Chemistry
Which one of the following minerals is found in pure form?

Iron
Manganese
Bauxite
Copper

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Chemistry
Of the following commonly used materials, the one that is not an alloy is

Bronze
Steel
Brass
Copper

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Chemistry
London smog is found in

Summer during morning time
Summer during day time
Winter during morning time
Winter during day time

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Chemistry
Which of the following is not a nitrogenous fertilizer ?

CaCN2
Ca(CN)2
NH4NO3
Urea

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Chemistry
When a spoon is to be electroplated with nickel the spoon is

Dipped in a nickel sulphate solution
Made cathode and a pure nickel red, the anode
Made anode and a pure nickel rod, the cathode
Coated with nickel sulphate and dried

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Chemistry
The chemical(s) most commonly used for cloud seeding or ‘artificial rainmaking’ is/are

All listed here
Silver Iodide
Sodium Chloride
Dry ice or frozen carbon dioxide

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