Arrange the following species in increasing order of their dipole moments:
NH₃,NF₃,BF₃,H₂O
 

1. $N{H}_3<B{F}_3<N{F}_3<H_{2}O$

2. $B{F}_3<N{F}_3<N{H}_3<H_{2}O$

3. $B{F}_3<N{H}_3<N{F}_3<H_{2}O$

4. $H_{2}O<N{F}_3<N{H}_3<B{F}_3$

The number of hydrogen bonded water molecules(s) associated with \(\mathrm{C u S O_{4} . 5 H_{2} O}\) is:

1. 3

2. 1

3. 2

4. 5

Which of the following atomic orbitals would have the greatest overlap to form the strongest covalent bond?

 The 'S' atom among the following that does not have \(\mathrm{sp}^3\) hybridization is

molecular shapes of ${\mathrm{SF}}_4, {\mathrm{CF}}_4 \mathrm{and} {\mathrm{XeF}}_4$ are 

1.  Same with 2, 0 and 1 lone pairs of electrons respectively

2.  The same with 1, 1 and 1 lone pairs of electrons respectively 

3.  Different with 0, 1 and 2 lone pairs of electrons respectively 

4.  Different with 1, 0 and 2 lone pairs of electrons respectively

Which of the following is a paramagnetic compound?

1. ${\mathrm{N}}_2$

2. ${\mathrm{H}}_2$

3. ${\mathrm{Li}}_2$

4. ${\mathrm{O}}_2$

The bond order depends on the number of electrons in the bonding and antibonding orbitals.

Which of the following statements are correct about bond order?

1.  Bond order can have a negative value.

2.  It always has an integral value.

3.  It is always  a non zero quantity

4.  It can assume any value-positive or fractional, including zero.

Match the oxide given in Column I with its property given in Column II:

Which of the following options is correct?

The correct statement is

1. When O₂ is converted into $O_2^{+}$ then bond distance increases

2. When N₂ is converted into $N_2^{+}$ then bond distance increases

3. When CO is converted into CO⁺ then bond distance increases

4. All of these

A pair in which both species are not likely to exist is: