Chemistry · 2015
JEE Main · 10 April 2015, Shift 1 · Q35
The heat of atomization of methane and ethane are 360 kJ/mol and 620 kJ/mol, respectively. The longest wavelength of light capable of breaking the C…
The heat of atomization of methane and ethane are $\displaystyle 360$ kJ/mol and $\displaystyle 620$ kJ/mol, respectively. The longest wavelength of light capable of breaking the C - C bond is (Avogadro number $\displaystyle =6.02 \times 10^{23}$, $\displaystyle \mathrm{h}=6.62 \times 10^{-34} \mathrm{~J} \mathrm{~s}$ ) :
Official answer
(1)
$\displaystyle 1.49 \times 10^3 \mathrm{~nm}$
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JEE Main 2015 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.