Classification Of Elements And Periodicity In Properties Ques 7
7. Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for $C, Ca$, $Al, F$ and $O$ ?
[NEET Kar. 2013]
(a) $Ca<Al<C<O<F$
(b) $Al<Ca<O<C<F$
(c) $Al<O<C<Ca<F$
(d) C $<$ F $<O<Al<Ca$
Show Answer
Answer:
Correct Answer: 7.(a)
Solution:
(a) As the nuclear charge increases, the force of attraction between the nucleus and the incoming electron increases and hence the elecron gain enthalpy becomes more negative, hence the correct order is
$Ca<Al<C<O<F$
BETA
