The correct statement among the following regarding behavior of ${\mathrm{BCI}}_3$ $\mathrm{and}$ ${\mathrm{CCI}}_4$ in water is -

1.	BCI3  readily undergoes hydrolysis while  CCI4  completely resists hydrolysis.
2.	CCI4  readily undergoes hydrolysis while  BCI3  completely resists hydrolysis.
3.	Both  BCI3  and  CCI4  readily undergo hydrolysis.
4.	Neither  BCI3  nor  CCI4  undergo hydrolysis.

Boric acid is a-

1. Protic acid.

2. Weak monobasic acid.

3. Lewis acid.

4. Both '2' and '3'

The effect of heating Boric acid at 370 K or above is -

1. Orthoboric acid changes to metaboric acid.

2. Metaboric acid changes to boric oxide.

3. Both '1' and '2'

4. Neither '1' nor '2'

The shapes of ${\mathrm{BF}}_3 \mathrm{and} \mathrm{B}{{\mathrm{H}}_4}^{-}$ and the hybridization of boron in these species are respectively -

1. ${\mathrm{BF}}_3$ - triangular geometry, ${\mathrm{sp}}^2$; $\mathrm{B}{{\mathrm{H}}_4}^{-}$- tetrahedral, ${\mathrm{sp}}^3$

2. ${\mathrm{BF}}_3$ - tetrahedral, ${\mathrm{sp}}^2$; $\mathrm{B}{{\mathrm{H}}_4}^{-}$ - triangular geometry, ${\mathrm{sp}}^3$

3.  ${\mathrm{BF}}_3$ - tetrahedral, ${\mathrm{sp}}^3$ ; $\mathrm{B}{{\mathrm{H}}_4}^{-}$ - triangular geometry, $s{p}^3$

4. ${\mathrm{BF}}_3$ - tetrahedral, ${\mathrm{sp}}^2$ ; $\mathrm{B}{{\mathrm{H}}_4}^{-}$ - triangular geometry, ${\mathrm{sp}}^2$

Reaction(s) that justify the amphoteric nature of aluminum is-

$1. 2\mathrm{Al}\left(\mathrm{s}\right) + 6\mathrm{HCl}\left(\mathrm{aq}\right) \to 2{\mathrm{Al}}^{+3}\left(\mathrm{aq}\right) + 6{\mathrm{Cl}}^{-}\left(\mathrm{aq}\right) + 3{\mathrm{H}}_2\left(\mathrm{g}\right)$​

$2. 2\mathrm{Al}\left(\mathrm{s}\right) + 2\mathrm{NaOH}\left(\mathrm{aq}\right) + 6{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right) \to 2\mathrm{Na}\left[\mathrm{Al}{\left(\mathrm{OH}\right)}_4{]}^{-}\right(\mathrm{aq}) +3{\mathrm{H}}_2(\mathrm{g})$​

3. Both '1' and '2'

4. Neither '1' nor '2'

The electron-deficient compound among the following is -

1. ${\mathrm{SiCl}}_4$

2. ${\mathrm{BCl}}_3$

3. ${\mathrm{PCl}}_3$

4. $\mathrm{ICl}$

The hybridization of carbon in (a) ${\mathrm{CO}}_3^{2-}$ (b) diamond (c) graphite is respectively:

1. ${\mathrm{sp}}^2$, ${\mathrm{sp}}^3$, ${\mathrm{sp}}^2$

2. ${\mathrm{sp}}^2$, ${\mathrm{sp}}^3$, $s{p}^3$

3. ${\mathrm{sp}}^3$, ${\mathrm{sp}}^3$, ${\mathrm{sp}}^2$

4. ${\mathrm{sp}}^3$, ${\mathrm{sp}}^2$, ${\mathrm{sp}}^3$

The B–F bond lengths in ${\mathrm{BF}}_3$ (130 pm) and $\mathrm{B}{{\mathrm{F}}_4}^{-}$(143 pm) differ because of:

1. Presence of triple bond character in ${\mathrm{BF}}_3$

2. Resonance in $\mathrm{B}{{\mathrm{F}}_4}^{-}$

3. Presence of a double bond character in ${\mathrm{BF}}_3$

4. Presence of a double bond character in $\mathrm{B}{{\mathrm{F}}_4}^{-}$

Despite the dipole moment in the B–Cl bond, the BCl₃ molecule as a whole has no dipole moment because:

CO is a poisonous gas because :