Q.

The dimerisation of NO2 as the temperature is lowered is accompanied by

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a

a decrease in pressure

b

the formation of a colloid

c

an increase in pressure

d

a decrease in paramagnetism

answer is D.

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Detailed Solution

The dimerisation of NO2 as the temperature is lowered is accompanied by a decrease in paramagnetism because NO2 contains an unpaired electron but no unpaired electron is present in the structure of N2O4.
 

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The dimerisation of NO2 as the temperature is lowered is accompanied by