Which set contains only covalently bonded molecules?

(1) $BC{l}_{3<mspace\; width="1em"></mspace>},<mspace\; width="1em"></mspace>SiC{l}_4<mspace\; width="1em"></mspace>,PC{l}_3$

(2) $N{H}_{4}Br<mspace\; width="1em"></mspace>,<mspace\; width="1em"></mspace>N_2{H}_4,HBr$

(3) $I_{2<mspace\; width="1em"></mspace>,}{H}_{2}S<mspace\; width="1em"></mspace>,<mspace\; width="1em"></mspace>NAI$

(4) $A{l}_2,O_{3<mspace\; width="1em"></mspace>},<mspace\; width="1em"></mspace>A{S}_4$

$N{F}_3$ is:

(1) non-polar compound 

(2) electrovalent compound 

(3) having low value of dipole moment than $N{H}_3$

(4) having more dipole moment than $N{H}_3$

The ionisation energy will be maximum for the process:

(a) $Ba\to B{a}^{2+}$

(b) $Be\to B{e}^{2+}$

(c) $Cs\to C{s}^{+}$

(d) $Li\to L{i}^{+}$

Which of the following statement is true for $I{O}_2{F_2}^{-}$according to VSEPR theory?

(A) The lone pair and two I-O double bonds occupy the equatorial positions of trigonal
bipyramid.

(B) It has $s{p}^3$ hybridization and is T-shaped.

(C)  Its structure is analogous to $S{F}_4$.

(D) (A) and (C) both

The least polar bond is present in which of the following?

In which of the following species central atom is NOT surrounded by exactly 8 valence electrons?

(a) $B{F_4}^{-}$

(b) $NC{l}_3$

(c) PC${l_4}^{+}$

(d) $S{F}_4$

Which of the following compound have the same no. of lone pair with their central atom?

(i)$<mspace\; width="1em"></mspace>{\mathrm{XeF}}_5^{-<mspace\; width="1em"></mspace>}$             

(ii) ${\mathrm{BrF}}_3$                 

(iii) ${\mathrm{XeF}}_2$                     

(iv) ${\mathrm{H}}_3{\mathrm{S}}^{+}$               

(v) Triple Methylene     

options are as follows :        

(1) (iv) and (v)                                     

(2) (i) and (iii) 

(3) (i) and (ii)                                     

(4) (ii) (iv), (v)

$H_{2}O$ has a net dipole moment while Be$F_2$ has zero dipole moment because :

(1) F is more electronegativity than oxygen 

(2) Be is more electronegativity than oxygen 

(3) $H_{2}O<mspace\; width="1em"></mspace>$ molecule is linear and Be$F_2$ is bent 

(4) $Be{F}_2$ molecule is linear and $H_{2}O$ is bent

Most covalent compound among the following is :

The correct order of covalent bond character among
LiCl, BeCl₂, BCl₃ and CCl₄, is:

1. LiCl < BeCl₂ > BCl₃ > CCl₄

2. LiCl > BeCl₂ < BCl₃ < CCl₄

3. LiCl < BeCl₂ < BCl₃ < CCl₄

4. LiCl > BeCl₂ > BCl₃ > CCl₄