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Chemistry

Chemistry
Which among the following is pure matter ?

Iron
Brass
Carbon–dioxide
Air

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Chemistry
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

7.2 x
5x
5x/36
x/6

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Chemistry
The coating of a thin layer of zinc on steel or iron objects is known as

Galvanising
Tinning
Hot dipping
Electroplating

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Chemistry
Which one of the following is used as an anti-freeze for the automobile engines ?

Ethanol
Propyl alcohol
Methanol
Ethylene glycol

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Chemistry
Extensively used nitrogenous fertilizer is

Ammonium nitrate
Ammonium sulphate
Nitro-lime
Urea

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Chemistry
Which of the following substance is highly plastic ?

Granite
Quartz
Mica
Clay

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MORE MCQ ON Chemistry

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