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Chemistry

Chemistry
Formation of ozone hole is maximum over

Africa
Europe
Antarctica
India

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Chemistry
Among the following iron ores, the highest percentage of iron content is found in–

None of these
Magnetite
Limnonite
Haemetite

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Chemistry
Hardest allotrope of carbon is

Lamp black
Diamond
Coke
Graphite

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Chemistry
A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed?

From pink to blue-green
From brown to orange-red
From brown to blue-black
From blue to pink

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Chemistry
Sodium is produced by the electrolysis of

Molten sodium carbonate
Molten sodium chloride
Aqueous brine solution
Its cyanide complex

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Chemistry
Sodium Carbonate is commonly known as

Caustic Soda
Washing Soda
Caustic Potash
Baking Soda

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MORE MCQ ON Chemistry

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