MCQ
The compound that does not give a blue colour in Lassaigne's test for nitrogen is :
- AAniline
- BGlycine
- ✓Hydrazine
- DUrea
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$C(g) + 4H(g) \to C{H_4}(g),\,\Delta H = - {x_1}\,k\,cal$
$C{H_4}(g) \to C{H_3}(g) + H(g),\,\Delta H = + y\,k\,cal$
The bond energy of $C - H$ bond is
$\mathrm{C}_{7} \mathrm{H}_{8} \stackrel{3 \mathrm{Cl}_{2} / \Delta}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Br}_{2} / \mathrm{Fe}}{\rightarrow} \mathrm{B} \stackrel{\mathrm{Zn} / \mathrm{HCl}}{\rightarrow} \mathrm{C}$
The product '$C$' is
