MCQ
The elements having the electronic configuration $[Kr]4d^{10}\,f^{14}\,5s^2\,p^6\,d^2\,6s^2$ belongs to
- A$s-$ block
- B$p-$ block
- ✓$d-$ block
- D$f-$ block
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${N_2}{H_4}(l)\,+\,2{H_2}{O_2}(l)\,\, \to \,{N_2}(g)\,\, + \,4{H_2}O(l);\,\,{\Delta _r}H_1^o\, = \, - 818\,\,kJ/mol$
${N_2}{H_4}(l)\,\, + {O_2}(g)\,\, \to \,{N_2}(g)\,\, + \,2{H_2}O(l);\,\,{\Delta _r}H_2^o\, = \, - 622\,\,kJ/mol$
${H_2}(g)\,\, + 1/2{O_2}(g)\,\, \to \,{H_2}O(l);\,\,{\Delta _r}H_3^o\, = \, - 285\,\,kJ/mol$
......$kJ/mol$
$n-$propyl bromide $\xrightarrow{{Na}}(A)\xrightarrow[{A{l_2}{O_3}/773\,K}]{{Cr{O_3}}}(B)\xrightarrow[{500\,K}]{{C{l_2}/UV}}(C)$
$n-$propyl bromide $\xrightarrow{{Na}}(A)\xrightarrow[{A{l_2}{O_3}/773\,K}]{{Cr{O_3}}}(B)$ $\xrightarrow[{}]{{C{H_3} - Cl/AlC{L_3}}}(D)\xrightarrow{{C{l_2}/hv}}(E)$