Lewis Kossel Structure

Q. Explain valence bond theory?

Q. The bond order of NO molecule is

1. 1.5
2. 2.0
3. 2.5
4. 3.0

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.

In ${\mathrm{PO}}_4^{3-}$, the formal charge on each oxygen atom and the $\mathrm{P}-\mathrm{O}$ bond order respectively are

1. $-0.75,0.6$

2. $-0.75,1.0$

3. $-0.75,1.25$

4. $-3,1.25$

Q. Which of the following species contains equal number of $\sigma$- and $\pi$- bonds?

1. $HC{O}_3^{-}$
2. $Xe{O}_4$
3. $(CN{)}_2$
4. $C{H}_2(CN{)}_2$

Q.

Which compound contains both ionic and covalent bonds?

1. ${\mathrm{AlCl}}_3$

2. $\mathrm{HCl}$

3. ${\mathrm{NH}}_4\mathrm{Cl}$

4. $\mathrm{KCl}$

Q.

What is the formal charge on each atom in ${\mathrm{CO}}_2$?

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

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

Q.

Why the shape of ${\mathrm{BeCl}}_2$molecule is linear?

Q. Identify $A,B,C,D,E,R\text{and}{R}^{\prime }$ in the following:

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

1. 0
2. +$\frac{1}{2}$
3. 1
4. -1

Q.

What is the Formal charge on $\mathrm{Cl}$ in ${\mathrm{HClO}}_4$?

Q.

Write the significance and limitations of the octet rule.

Q. The formula of soda ash is

1. $N{a}_{2}C{O}_3.10H_{2}O$
   
   
2. $N{a}_{2}C{O}_3.H_{2}O$
   
3. $N{a}_{2}C{O}_3$
   
4. $N{a}_{2}C{O}_3.2H_{2}O$
   

Q. a sample of a radioactive substance undergo 80% decomposition in 345 minutes its half life is

Q.

In a molecule of pyrophosphoric acid, the number of P-OH, P = O and P - O - P bonds/moiety (ies) respectively is:

1. 3, 3 and 3

2. 4, 2 and 1

3. 2, 4 and 1

4. 4, 2 and 0

Q.

Explain the formation of a chemical bond.

Q. Assertion$\left(A\right)$: In the reaction between potassium permanganate and potassium iodide, permanganate ions act as oxidising agent.
Reason$\left(R\right)$: Oxidation state of manganese changes from $+2$ to $+7$ during the reaction.

1. Both $A$ and $R$ are false.
2. Both $A$ and $R$ are true and $R$ is the correct explanation of $A$.
3. $A$ is true but $R$ is false.
4. Both $A$ and $R$ are true and $R$ is not the correct explanation of $A$.

Q. The Lewis structure of $C{O}_3^{2-}$ ion is:

1. 
2. 
3. 
4. 

Q.

How do you determine if a molecule is linear?

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. Which of the following species can form hydrogen bond with water
a) CH₄
b) HCOOH
c) Na⁺
d) C₆H₆

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

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

Q. Find the number of hypervalent compounds among the following.
$B{F}_3,S{F}_4,NC{l}_3,PC{l}_5,Si{F}_4,Br{F}_5,Xe{F}_2,BeC{l}_2$

Q.

Importance of bonding theory and its examples.

Q. 13.A sample of a radioactive substance undergoes 80% decomposition in 345minutes.Its half life is 1)ln2/ln5*345min 2)ln5/ln2*345min 3)ln5/ln4*345min 4)ln4/ln5*345min

Q. The correct electron-dot formulation for hydrogen cyanide shows:

1. 2 double bonds and two lone pairs of electrons on the N atom.
2. 1 triple bond between C and N, 1 C-H bond and 1 lone pair of electrons on the N atom.
3. 1 C-H bond, 1 C-N bond, 2 lone pairs of electrons on the C atom and 3 lone pairs of electrons on the N atom.
4. 1 C-H bond, 1 C = N bond, 1 lone pair of electrons on the C atom and 1 lone pair of electrons on the N atom.

Q. In the reactions given below, identity the species undergoing oxidation and reduction:

$A)$ $H_{2}S\left(g\right)+C{l}_2\to 2HCl\left(g\right)+S\left(s\right)$

$B)$ $3F{e}_3{O}_4\left(s\right)+8Al\left(s\right)\to 9Fe\left(s\right)+4A{l}_2{O}_3\left(s\right)$

$C)$ $2Na\left(s\right)+H_2\left(g\right)\to 2NaH\left(s\right)$

Q.

A sp³ hybrid orbital contains

1/4 s-character or 2/3 s-character

Q. Which of the following is/are limitations of crystal field theory?

1. It does not explain the colour of the complex
2. It does not predict the magnetic moment of complex
3. It does not explains $\pi -$ bonding in complex
4. It does not consider any metal orbitals other than d-orbital