Order of decreasing acidity of

$\left(i\right)HCOOH\left(ii\right)C{H}_{3}COOH\left(iii\right)C{l}_{2}CHCOOH\left(iv\right)C{F}_{3}COOHis$

Q.

Order of decreasing acidity of the following is

(I) HCOOH

(II) ${CH}_{3}COOH$

(III) ${Cl}_{2}CHCOOH$

(IV) ${CF}_{3}COOH$

Q. Give the decreasing order of hyperconjugative effect of R in $R-CH=C{H}_2,$ where R is:
I. $Me$ II. $Et$ III. $M{e}_{2}CH$ IV. $M{e}_{3}C$

Q. Arrange (I) $C{e}^{3+}$, (II) $L{a}^{3+}$, (III) $P{m}^{3+}$ and (IV) $Y{b}^{3+}$ in increasing order of their ionic radii

Q.

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)

Q. Arrange the following oxides in the decreasing order of their acidic strengths.
$I.ZnO$ $II.K_{2}O$ $III.P_2{O}_5$ $IV.MgO$