Arrange the following in decreasing order of oxidation number of iodine :
`I_2, HI, HIO_4, ICl.`

Arrange the following in increasing order of oxidation number of chlorine Cl_2, HClO_4, HCl, ICl

Arrange the following in decreasing order of oxidation number of nitrogen N_2O, N_2O_4, NO, N_2O_3

Arrange the following in order of decreasing oxidation number of Nitrogen. NH_3 , N_3H , N_2O, NO , N_2O_5

Arrange the following orbitals in increasing order of energy. 4f,5p,4s,3d

Arrange the following in increasing order if acid strength: HCl, HI, HBr, HF.

Arrange the following in decreasing order of their basic strength: C_6H_5NH_2, C_2H_5NH_2,(C_2H_5)_2NH,NH_3

Arrange the following: (in increasing order of reactivity towards nucleophiles) HCHO,CH_3COCH_3,CICH_2CHO,CH_3CHO .