Question

Give the correct order of initials $T$ or $F$ for the following statements. Use $T$ if statement is true and use $F$ if the statement is false:
(I) The order of repulsion between pair of electrons is $l_p-l_p>l_p-b_p>b_p-b_p$ where $l_p=\text{lone pair},b_p=\text{bond papir}$
(II) In general, as the number of lone pair of electrons on central atom increases , value of bond angle from normal bond angle also increases.
(III) The number of lone pair on $O$ in $H_{2}O$ is $2$ while on $N$ in $N{H}_3$ is 1.
(IV) The structures of xenon flourides and xenon oxyflourides could not be explained on the basis of VSEPR theory.

• A. $TTTF$
• B. $TFTF$
• C. $TFTT$
• D. $TFFF$

Answer 1

The correct option is B $TFTF$

(i)
$\left(T\right)$ The order of repulsion between pair of electrons is $l_p-l_p>l_p-b_p>b_p-b_p$
(ii)
$\left(F\right)$ In general as the number of lone pair of electrons on central atom increases, value of bond angle from normal bond angle decreases since lone pair - lone pair repulsion is more compared to bond pair - bond pair repulsion.
(iii)
$\left(T\right)$ The number of lone pair on $O$ in $H_{2}O$ is $2$ while on $N$ in $N{H}_3$ is 1.
(iv) $\left(F\right)$ The structures of xenon flourides and xenon oxyflourides can be explained on the basis of VSEPR theory.