Lewis Kossel Structure

Q. The formal charge on $N$ in $N{O}_2^{-}$ is:

1. \N
2. 1
3. -1
4. +$\frac{1}{2}$

Q.

Why does the lattice energy increase as the size of an ion decreases?

Q.

What is the charge of S atom in ${\mathrm{SO}}_3$?

Q. How many non bonding electron pair(s) is/are present in $N_2{H}_4$?

1. 1
2. 2
3. 3
4. 4

Q. The correct order of melting point of alkali metal chlorides is:

1. $NaCl>KCl>CsCl$
2. $NaCl>KCl>CsCl$
3. $CsCl>KCl>NaCl$
4. $CsCl>NaCl>KCl$

Q. Which of the following is not Lewis acid?

1. $AlC{l}_3\cdot 6H_{2}O$
2. $AlC{l}_3$
3. $BC{l}_3$
4. All of these

Q. Which of the following does not have eight valence electrons?

1. $C{a}^{+}$
2. $R{b}^{+}$
3. $Xe$
4. $B{r}^{-}$

Q.

In LiF, the structure of $F^{-}$ is

1. 

2. 

3. 

4. None of these

Q. According to Pauling's scale, for the formation of covalent bond, the difference in the value of electronegativities should be

1. $\text{Equal to or less than 1.7}$
2. $\text{More than 1.7}$
3. $\text{1.7 or more}$
4. None

Q. What is the hybridization of $C$ atom in $C{H}_3$ radical?

1. $s{p}^2$
2. $s{p}^3$
3. $sp$
4. $s{p}^{3}d$

Q. Identify the correct sequence of increasing number of $\pi$ - bonds in the structure of the following molecules.
(I) $H_2{S}_2{O}_6$ (II) $H_{2}S{O}_3$ (III) $H_2{S}_2{O}_5$

1. II, III, I
2. II, I, III
3. I, II, III
4. I, III, II

Q. Which of the following cannot act as central atom?

1. $H$
2. $F$
3. $O$
4. Both $\left(a\right)$ and $\left(b\right)$

Q.

Lewis-Kossel structure of $N_2$ is

1. 

2. 

3. 

4. None of these

Q. A valid Lewis structure cannot be drawn for which of the following compounds?
$(P=15,Si=14,C=6,Se=34)$

1. $P{O}_4^{3-}$
2. $Si{F}_4$
3. $C{F}_4$
4. $Se{F}_4$

Q. How many non bonding electron pair(s) is/are present in $N_2{H}_4$?

1. 1
2. 2
3. 3
4. 4

Q. Which of the following has a octet/duplet electronic configuration?

1. $B^{3-}$
2. $B^{-}$
3. $B^{3+}$
4. $B^{2+}$

Q. In which of the following N is in the $sp$ hybridisation state ?

1. $(C{H}_3{)}_{3}N$
2. $C{H}_{3}CON{H}_2$
3. $N{O}_2^{+}$
4. None of the above

Q. Identify the correct sequence of the increasing order of $\pi$- bonds in the following molecules:
(I) $H_2{S}_2{O}_6$
(II) $H_{2}S{O}_3$
(III) $H_2{S}_2{O}_5$

1. I < II < III
2. II < III < I
3. II < I < III
4. I < III < II

Q. Identify the correct sequence of the increasing order of $\pi$- bonds in the following molecules:
(I) $H_2{S}_2{O}_6$
(II) $H_{2}S{O}_3$
(III) $H_2{S}_2{O}_5$

1. I < II < III
2. II < III < I
3. II < I < III
4. I < III < II

Q. The correct statements among the following are:

I. Due to greater polarizing power of $L{i}^{+}$, $L{i}_{2}C{O}_3$ is most stable
II. $LiHC{O}_3$ does not exist as solid
III. $NaN{O}_3$ on strong heating gives $NaN{O}_2$ whereas $LiN{O}_3$ will give $L{i}_{2}O$
IV. Sodium & Potassium ions are involved in the transport of sugars and amino acids into the cells
V. $LiF$ is less soluble due to smaller hydration energy of $L{i}^{+}$ ion

1. I, II & V

2. III, IV & V

3. II, III & IV

4. I, III & V

Q. Arrange $CsF,RbF,NaF,KF,$ and $LiF$ in the decreasing order of lattice energy:

1. $LiF>NaF>RbF>KF>CsF$
2. $CsF>RbF>LiF>KF>NaF$
3. $CsF>RbF>NaF>KF>LiF$
4. $LiF>NaF>KF>RbF>CsF$

Q. Arrange $CsF,RbF,NaF,KF,$ and $LiF$ in the decreasing order of lattice energy:

1. $LiF>NaF>RbF>KF>CsF$
2. $CsF>RbF>LiF>KF>NaF$
3. $CsF>RbF>NaF>KF>LiF$
4. $LiF>NaF>KF>RbF>CsF$

Q. In the Lewis dot structure of acetic acid, there are:

1. 8 bond pairs and 4 lone pairs of electrons
2. 4 bond pairs and 8 lone pair of electrons
3. 6 bond pairs and 6 lone pairs of electrons
4. 9 bond pairs and 3 lone pairs of electrons

Q. The Hydration energy of $M{g}^{2+}$ is larger than that of:

1. $A{l}^{3+}$
2. $C{a}^{2+}$
3. $B{e}^{2+}$
4. Can't be predicted