Formal Charge

Q. Calculate the formal charge on the central oxygen atom in $O_3$.

1. \N
2. 1
3. -1
4. 0.5

Q.

Arrange the following elements in the order of negative inductive effect :${{\mathrm{NH}}_3}^{+},{\mathrm{NO}}_2,\mathrm{CN},\mathrm{CHO},\mathrm{CO},\mathrm{COOH},{\mathrm{CONH}}_2,\mathrm{F},\mathrm{Cl},\mathrm{Br},\mathrm{I},\mathrm{OH},\mathrm{OR},{\mathrm{NH}}_2,\mathrm{COCl},{\mathrm{C}}_6{\mathrm{H}}_5,{\mathrm{HSO}}_3\mathrm{H}$

Q.

How do you calculate the formal charge of all atoms in ${{\mathrm{NO}}_3}^{-}$ ?

Q.

What are the formal charges in ${\mathrm{O}}_3$(ozone)?

Q. Calculate the formal charge on the central oxygen atom in $O_3$.

1. 0
2. 1
3. -1
4. 0.5

Q. The formal charge on the starred oxygen in the carbonate ion is
[O−O||C−∗O]2−

1. 1
2. -1
3. -2

Q. Quantum number sufficient to describe the electron in hydrogen atom is :

1. l
2. n
3. m
4. s

Q. The formal charges on $Cl$ in $HClO$ and $Cl{O}^{-}$ ions repectively are:

1. $0,-1$
2. $0,0$
3. $-1,-1$
4. $-1,0$

Q.

Which is more covalent $\mathrm{LiCl}\mathrm{or}{\mathrm{BeCl}}_2$?

Q. Three elements X, Y and Z have atomic numbers 11, 12 and 17 respectively. Find the sum of their electrovalency.

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

Q. The formal charge on $Cl$ in $HCl{O}_3\text{and}Cl{O}_3^{-}$ is:

1. $0$ and $-1$ respectively
2. $0$ and $0$ respectively
3. $-1$ and $-1$ respectively
4. $-1$ and $0$ respectively

Q.

Definition of inductive effect?

Q.

Explain why $MeN{H}_2$ is stronger base than $MeOH?$

Q. The correct order of increasing covalent character is-

1. SiCl₄ < AlCl₃ < CaCl₂ < KCl
2. KCl < CaCl₂ < AlCl₃ < SiCl₄
3. AlCl₃ < CaCl₂ < KCl < SiCl₄
4. None of these.

Q. Assertion: $C{O}_2$ is a resonance stabilized molecule.
Reason: The bond length of $C-O$ in $C{O}_2$ is in between the lengths of a single and a double bond.

1. Both the assertion and the reason are true and the reason is the correct explanation of the assertion.
2. Both the assertion and the reason are true but the reason is not the correct explanation of the assertion.
3. The assertion is true but the reason is false.
4. Both the assertion and the reason are false.

Q. The formal charge on the phosphorous atom in $P{O}_4^{3-}$ ion is:

1. 0
2. $+2$
3. $-2$
4. $+3$

Q. The formal charge of S atom in $S{O}_3$ is :

1. $+2$
2. $+1$
3. $0$
4. $-1$

Q. Calculate the formal charge on the nitrogen atom in $N{H}_4^{+}$.

1. 1
2. 0.25
3. -1
4. -0.25

Q. The formal charge on $Cl$ in $HCl{O}_3$ and $Cl{O}_3^{-}$ is:

1. 0 and -1 respectively
2. 0 and 0 respectively
3. -1 and -1 respectively
4. -1 and 0 respectively

Q. Calculate the formal charge on the chlorine atom in $HCl{O}_3$.

1. 0
2. -1
3. 1
4. -0.5

Q.

(i)

Write Lewis structure of the following compound and show formal charge on each atom.

$HN{O}_3$

(ii)

Write Lewis structure of the following compound and show formal charge on each atom.

$N{O}_2$

(iii)

Write Lewis structure of the following compound and show formal charge on each atom.

$H_{2}S{O}_4$

Q. Which one of the following hydrogen halide is a liquid?

1. $HF$
2. $HCl$
3. $HBr$
4. $HI$

Q. If

Diagram

is mixed with $NaOH$ solution. Acid-base reaction occurs and proton is snatched from organic molecule. Which carbon will lose easily?

1. $S$
2. $P$
3. $Q$
4. $R$

Q. What is the formal charge of ${NO}_2^{-}$?

Q. Can a non polar molecule have polar covalent bonds?

Q. Which of the following statements are true with respect to electronic displacement in a covalent bond?
I. Inductive effect operates through $\pi$-bond.
II. Resonance effect operates through $\sigma$-bond.
III. Inductive effect operates through $\sigma$-bond.
IV. Resonance effect operates through $\pi$-bond.
V. Resonance and inductive effects operate through $\sigma$-bond.

1. III and IV
2. I and II
3. II and IV
4. I and V

Q. What is the formal charge of the centre most $O$ in ozone?

1. -1
2. 0
3. 1
4. 2

Q.

What is the formal charge on the starred oxygen in the carbonate ion? $[O-\stackrel{\underset{||}{O}}{C}-\stackrel{\ast }{O}{]}^{2-}$

1. 0

2. -1

3. -2

4. 1

Q.

Question 05

In $P{O}_4^{3-}$ ion the formal charge on the oxygen atom of P - O bond is

(a) +1

(b) -1

(c) -0.75

(d) +0.75

Q.

Which of the following substances is associated with the weakest electrostatic forces of attraction?

1. $\mathrm{HCl}$

2. $\mathrm{NaCl}$

3. $\mathrm{Na}$

4. ${\mathrm{Cl}}_2$