6
MCQ (Single Correct Answer)
In $\mathrm{NO}_3^{-}$ion, the number of bond pairs and lone pairs of electrons on nitrogen atom are
A
2, 2
B
3, 1
C
1, 3
D
4, 0
7
MCQ (Single Correct Answer)
Which of the following species has tetrahedral geometry?
A
$\mathrm{BH}_4^{-}$
B
$\mathrm{NH}_2^{-}$
C
$\mathrm{CO}_3^{2-}$
D
$\mathrm{H}_3 \mathrm{O}^{+}$
8
MCQ (Single Correct Answer)
Number of $$\pi$$ bonds and $$\sigma$$ bonds in the following structure is
A
6, 19
B
4, 20
C
5, 19
D
5, 20
9
MCQ (Single Correct Answer)
Which molecule/ion out of the following does not contain unpaired electrons?
A
$\mathrm{N}_2^{+}$
B
$\mathrm{O}_2$
C
$\mathrm{O}_2^{2-}$
D
$\mathrm{B}_2$
10
MCQ (Single Correct Answer)
In which of the following molecule/ion all the bonds are not equal?
A
$\mathrm{XeF}_4$
B
$\mathrm{BF}_4^{-}$
C
$\mathrm{C}_2 \mathrm{H}_4$
D
$\mathrm{SiF}_4$