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Chemistry

Chemistry
How many neutrons does iron have

13
26
8
30

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Chemistry
Which of the following gases is present under pressure in soft drinks?

Oxygen
Nitrous oxide
Nitrogen
Carbon dioxide

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Chemistry
Which of the following is a method/process of disposing of solid waste which cannot be reused or recycled ?

Pyrolysis and Gasification
All listed here
Incineration
Landfills

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Chemistry
Which of the following acids serves as an electrolyte in a lead storage battery?

Nitric acid
Lactic acid
Sulphuric acid
Hydrochloric acid

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Chemistry
The metal chiefly used for galvanising iron is :

Cadmium
Tin
Zinc
Mercury

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Chemistry
Soap helps in better cleaning of clothes because

Soap acts like catalyst
It reduces the surface tension of solution
It absorbs the dirt
It gives strength to solution

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