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Chemistry

Chemistry
Which is the purest commercial form of iron ?

Wrought iron
Stainless steel
Steel
Pig iron

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Chemistry
DDT and BHC may act as

Carcinogens
Allergens
Asthematic agents
None of these

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Chemistry
Which among the following is pure matter ?

Iron
Air
Brass
Carbon–dioxide

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Chemistry
Aquaregia is a mixture of the following in the ratio 1 : 3 by volume

Conc. HNO3 and conc. HCl
Dil. HCl and dil. HNO3
Conc. HNO3 and conc. H2SO4
Conc. HCl and conc. HNO3

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Chemistry
The polymer used in making plastic crockery is

Bakelite
Nylon
Melamine
Decron

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Chemistry
Besides CO2, the other green house gas is

Ar Ar
O2
CH4
N2 N2

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MORE MCQ ON Chemistry

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