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Chemistry

Chemistry
The percentage of oxygen in air is approximately

0.78
0.21
1
0.01

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Chemistry
Copper substances when exposed to air gains a green coating due to the formation of:

CuO
CuCO3 Cu(OH)2
CuSO4
Cu(NO3)2

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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
Emission spectra
Raman spectra
Absorption spectra

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Chemistry
Milk is a natural

Mixture
Suspension
Solution
Emulsion

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Chemistry
Two electrons in an orbital are differentiated by which of the following ?

Spin quantum number
Principal quantum number
Magnetic quantum number
Azimuthal quantum number

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Chemistry
Which one element has the highest electronegativity value

Lithium
Chlorine
Nitrogen
Fluorine

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MORE MCQ ON Chemistry

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