84. Which is incorrect order of -I (1) F>Cl> Br>I (2) NR,>-NH3>-NO (3) OCH3>-OH>NH, > -C = CH>H (4) 85. Which of the following compounds is most basic? (1) CH3NH2 (3) CH,-N-CH3 CH (2) CH3-NH-CH3 (4) NH3 86. Given the two concentration of HCN (K = 10) are 0.1 M and 0.001 M respectively. What will be the ratio of degree of ionization? (1) 1 (3) 0.003 (2) 0.1 (4) 0.01 87. The pH of 0.1 M K2S solution is :- (1) >7 (2)