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Chemistry

Chemistry
Which of the following is the maximum number of electrons that can be present in M-shell?

32
18
2
8

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Chemistry
Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives

Copper at anode and oxygen at cathode.
Hydrogen at cathode and oxygen at anode
Copper at cathode and oxygen at anode
Copper at cathode and anodes dissolve to give copper

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Chemistry
The manufacture of iron from iron ore involves the process of

Reduction
Electrolysis
Oxidation
Fractional distillation

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Chemistry
Alum is used as

A disinfectant
An analgesic
A purifier for water
A fertilizer

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Chemistry
The most commonly used bleaching agent is

carbon dioxide
sodium chlorine
alcohol
chlorine

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Chemistry
Physico-chemical characteristics of water in water sources undergo changes due to

Aquatic macrophytes
Evapotranspiration
Effluents
Auatic fungi

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