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  • Which among the following is correct?Option: 1 The boiling point of <img alt="\mathrm{D}_2 \mathrm{O}" src="https://entrancecorner.oncodecogs.com/gif

Which among the following is correct?

Option: 1

The boiling point of \mathrm{D}_2 \mathrm{O} is more than \mathrm{H}_2 \mathrm{O} but melting point of \mathrm{H}_2 \mathrm{O} is more than \mathrm{D}_2 \mathrm{O}.
 


Option: 2

The boiling point of \mathrm{H}_2 \mathrm{O} is more than \mathrm{D}_2 \mathrm{O} but melting point of \mathrm{D}_2 \mathrm{O} is more than \mathrm{H}_2 \mathrm{O}.
 


Option: 3

The boiling point and melting point of \mathrm{D}_2 \mathrm{O} is more than \mathrm{H}_2 \mathrm{O}


Option: 4

The boiling point and melting point is equal for \mathrm{D}_2 \mathrm{O} and \mathrm{H}_2 \mathrm{O}


Answers (1)

best_answer

Melting point and boiling point of similar compounds depend upon their molecular weight. Compounds with higher molecular weight have more electrons and nuclei resulting into presence of vander waals attraction forces.

\mathrm{Property}    \mathrm{H_{2}O}     \mathrm{D_{2}O}     \mathrm{T_{2}O}
Molecular weight 18.015 22.028 22.0312
Melting point (K) 273.0 276.8 277.5
Boiling point (K) 373.0 374.4 374.5

 

Posted by

Pankaj Sanodiya

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