Arrange the following lengths in increasing order of their magnitude.
I. 1 Angstrom
II. 1 Micro
III. 1 Fermi
IV. 1 Light year

Arrange the following compounds in the increasing order of their densities.

(a) (i) < (ii) < (iii) <(iv) (b) (i) < (iii) < (iv) < (ii)

(c) (iv) <(iii) <(ii) < (i) (d) (ii) < (iv) < (iii) < (i)

Arrange the following in the increasing order of their basicity.

CH₃NH₂(I) ;(CH₃)₂NH(II) ;C₆H₅NH₂(III) ;(CH₃)₃N(IV)