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Chemistry

Chemistry
Electric fuse is an alloy of

Copper and iron
Zinc and lead
Tin and lead
Carbon and tin

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Chemistry
The metal used to recover copper from a solution of copper sulphate is

Hg
Na
Fe
Ag

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Chemistry
Which of the following contains high content of lead?

Cooking gas
Coal
Low octane fuel
High octane fuel

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Chemistry
Iron and manganese present as pollutants in water cannot be removed by________

Chlorination
Oxidation followed by settling and filtration
Ion exchange process
Lime soda process or manganese zeolite process

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Chemistry
Find the odd one:

Slaked lime
Marble
Limestone
Chalk

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Chemistry
The two metal ions that cause hardness to water are:

Sodium, Calcium
Sodium, Potassium
Calcium, Magnesium
Sodium, Magnesium

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