STD 12 - p -Block elements - ll — JEE STD 11 Science — Question

$\Delta H_f^o[CO_2,g] = -394 \,kJ/mol$ 

$\Delta H_f^o[H_2O,l] = -286\, kJ/mol$ 

$\Delta H_f^o [propene ,g] = 20\,kJ/mol$ 

cyclopropane $(g)$ $\to$ propene $(g)$ ; $\Delta H^o_{isomerisation} = $ $-33\,kJ/mol$.
Calculate $\Delta H^o_{combustion}$ [cyclopropane, $(g)$]

......$ kJ/mol$

$(A)$ Nucleotide form from nucleoside and phosphate group by ether linkage

$(B)$ In nucleoside, nitrogenous base link with hexose sugar of $DNA$ or $RNA$

$(C)$ $DNA$ and $RNA$ are differ in only nature of sugar

$(D)$ $A = T$ and $C \equiv G$ are hydrogen bond between nitrogenous base

$\begin{array}{*{20}{c}}
  {OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\ 
  {\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\ 
  {{C_6}{H_5} - CH - C{H_2} - C - C{H_3}} 
\end{array}\mathop {\xrightarrow{{(i)\,NaOBr}}}\limits_{(ii)\,{H_2}O/{H^ + }\,(iii)\,\Delta } $ product

product will be :