નીચે આપેલમાંથી કઈ રચના આપેલ અણુ ઘટકોના ઇલેક્ટ્રોન પ્રાપ્તિ એન્થાલ્પી (ઋણ ચિન્હ સાથે) નો યોગ્ય ક્રમ રજૂ કરે છે.
AIPMT 2005, Diffcult
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b (b) Halogens have very high electron affinity. It may be rated that the electron affinity of fluorine is unexpectedly low $( < Cl)$. This may perhaps be due to small size of $F$ atom. The value of electron gain enthalpies for $Cl,\,F,\,S$ and $O$ are respectively $349, 333, 200$ & $142 KJ / mol$ hence correct order is $Cl > F > S > O$
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$\overset{1}{\mathop{HC}}\,\equiv \overset{2}{\mathop{C}}\,-\overset{3}{\mathop{CH}}\,=\overset{4}{\mathop{CH}}\,-\overset{5}{\mathop{C{{H}_{3}}}}\,$ માં ક્યાં કાર્બન પરમાણુ સૌથી ઓછી વિધુતઋણતા દર્શાવે છે?