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Chemistry

Chemistry
Which gas is most stable at room temperature

N2
F2
H2
O2

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Chemistry
Percentage of carbon in steel ranges from

3.0 to 4.0
0.1 to 1.5
4.0 to 6.0
1.5 to 3.0

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Chemistry
Type metal used in printing press is an alloy of

Lead and zinc
Lead and bismuth
Lead and antimony
Lead and copper

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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
When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in

Fluorescence
Raman spectra
Absorption spectra
Emission spectra

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Chemistry
Petroleum consists of a mixture of

Carbohydrates
Carbonates
Hydrocarbons
Carbides

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MORE MCQ ON Chemistry

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