1.

Correct order of the heats of combustion of above compounds is :A. `(i) gt (ii) gt (iii)`B. `(i) gt (iii) gt (ii)`C. `(ii) gt (i) gt (iii)`D. `(ii) gt (iii) gt (i)`

Answer» Correct Answer - D
`Deltax.Deltap=(h)/(4pi) " Given "Deltax=10^(-13)c.m.`
`Deltap=mDeltav " "1 " Meter "= 100 c.m.`
`Deltax.m.Deltav=(h)/(4pi) " "1 c.m. = 10^(-2) " meter"`
`Deltav=(6.625xx10^(-34))/(4xx3.14xx10^(-11)xx9.1xx10^(-31))=0.0579xx10^(8)=5.79xx10^(6)m//sec`


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