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Chemistry

Chemistry
The most suitable unit for expressing nuclear radius is :

Nanometre
Fermi
Micron
Angstrom

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Chemistry
If the equilibrium constants for the systems H2 + I2 ? 2HI and 2HI ? H2 + I2 are K1 and K2 respectively, the relationship between K1 and K2 is :

K1 = K2
K1 = 2K2
K 1 = 1 /K2
K1 = K2/2

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Chemistry
Oxide of sulphur present in the atmosphere are washed down by rains to cause :

Industrial smog formation
Eutrophication in lakes
Depletion of fossil fuel reserves
Lowering of pH of soil

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Chemistry
The laws of electrolysis are given by

Ostwald
Arrhenius
Faraday
Lewis

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Chemistry
Number of6.023 × 1020 atoms present in one mole of a gas at STP is

6.023 × 1020
6.023 × 1023
'6.023 × 10–23
'6.023 × 10–20

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Chemistry
The percentage of oxygen in air is approximately

0.21
1
0.01
0.78

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