Question

56.
Which one of the following process is/are endothermic
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Answer 1

Answer:

It is the answer is the C.

Answer 2

Answer:

All are endothermic .

Explanation:

enthalpy of Be is positive because its electronic configuration is 1s2 , 2s2 and adding 1 electron to 2p will need some amount energy as it is not stable .

enthalpy of helium is positive because it is an inert gas and its electronic configuration is highly stable and same case in neon