Question

Which of the following order is incorrect?

• A. Hydrogen $>$ Deuterium $>$ Tritium; ($\%$ relative abundance)
• B. Hydrogen $<$ Deuterium $<$ Tritium; (density/ g $L ^{-1}$ )
• C. Hydrogen $<$ Deuterium $<$ Tritium; (boiling point/K)
• D. Hydrogen $>$ Deuterium $>$ Tritium; (melting point/K)

Answer 1

Answer: (D)

Relative abundance $: 10^{-15} \% < 0.016 \% < 99.984 \%$

Density $( g / L ) : 0.27\,\,\,\, > 0.18\,\,\,\, > 0.09$

Boiling point $(K) : 24.9 K\,\,\,\, > 23.5 K\,\,\,\, >20.4 \,K$

Melting point $(K) : 20.62\, K\,\,\,\, > 18.5 K\,\,\,\, > 13.9 \,K$