Year: 2019
Topic: Classification of Elements and Periodicity in Properties
Time :
1.
For the second period elements the correct increasing order of first ionisation enthalpy is
(1). Li < B < Be < C < O < N < F < Ne
(2). Li < B < Be < C < N < O < F < Ne
(3). Li < Be < B < C < O < N < F < Ne
(4). Li < Be < B < C < N < O < F < Ne