Magnetic moment 2.84 B.M. is given by :-

(At. nos, Ni = 28, Ti = 22, Cr = 24, Co = 27)

The electrolytic reduction of nitrobenzene in strongly
acidic medium produces :-

Which of the following options represents the correct
bond order ?

An organic compound 'X' having molecular formula
C₅H_10O yields phenyl hydrazone and gives negative
response to the Iodoform test and Tollen's test. It
produces n-pentane on reduction. 'X' could be :-

Which of the following pairs of ions are isoelectronic
and isostructural ?