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Chemistry

Chemistry
In galvanization, iron is coated with

Nickel
Tin
Zinc
Copper

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Chemistry
Gas released during Bhopal tragedy was :

Ethyl isothiocyanate
Sodium isothiocyanate
Potassium isothiocyanate
Methyl isothiocyanate

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Chemistry
Catalyst is a substance which

Increases the rate of the reaction
None of these
Decreases the rate of reaction
Has no action on the rate of the reaction

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Chemistry
The third shell of an atom can have a maximum of ______ electrons

21
18
13
15

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Chemistry
Helium gas is filled in ballons because

It is a noble gas
It is lighter than air
It is one of the constitutents of water
Its atomic number is 2

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Chemistry
The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is

cineole
limonene
engenol
geraniol

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