Overlaps Taking All Together

Q.

Assertion: The order of bond angle of halides of boron is ${\mathrm{BI}}_3>{\mathrm{BBr}}_3>{\mathrm{BCl}}_3>{\mathrm{BF}}_3$.

Reason: Greater is the size of surrounding atom, larger will be the bond angle.

1. Both assertion and reason are false.

2. Assertion is true, but the reason is false.

3. Both assertion and reason are true. The reason is the correct explanation of assertion.

4. Both assertion and reason are true. The reason is not the correct explanation of assertion.

Q.

what are the limitations of valence bond theory?

Q.

What r the limitations of VBT (valence bond theory)?

Q. Predict the shape of XeO3 with bond pair , lone pair calculation using valence electrons

Q.

Which of the following compounds does not have molecular plane as nodal plane for its $\pi$ - electron cloud?

1. CH₂ =CH₂

2. C₆H₆

3. CH₂ =C = CH₂

4. All of the above

Q. What are the postulates of molecular orbital theory?

Q. in mot theory CO molecular orbital structure there which rule we follow mixing or non mixing

Q. Which of the following depicts '+ve' overlapping?

1. 

2. 

3. 

4. None of these

Q.

When xenon reacts with fluorine to form binary fluorides:

1. Energy flows from system to surroundings

2. Energy flows from surroundings to system

3. There is no change in free energy

4. There is no change in entropy

Q. Draw lewis struture of H2O2(hydrogen peroxide)

Q.

Considering x-axis as the internuclear axis which out of the following will not form a sigma bond and why? (a) 1s and 1s (b) 1s and 2p_x (c) 2p_y and 2p_y (d) 1s and 2s.

Q.

According to orbital overlap concept, the formation of a covalent bond between two atoms results by pairing of electrons present in the valence shell having opposite spins.

1. True
2. False

Q. Explain Hund"s rule about molecular orbital theory

Q. Identify the incorrect statement regarding VBT.

Q. Which of the following are arranged in the decreasing order of dipole moment

Q.

According to orbital overlap concept, the formation of a covalent bond between two atoms results by pairing of electrons present in the valence shell having opposite spins.

1. True
2. False

Q. Correct order of dipole moment is ______

1. 
2. 
3. 
4. 

Q. 20. According to molecular orbital theory which of the following will not be viable molecule ? 1)He_2^+ 2)H_2^- 3)H_2^{2-} 4)He_2^{2+

Q.

Total number of orbitals in a shell is given by

1. n³

2. 3n²

3. n²

4. n⁴

Q. What is the total number of orbitalsassociated with the principal quantum number n 3?

Q. What is the importance of valence bond theory?

Q. Q. According to molecular orbital theory, explain why Be2 molecule does not exist ?

Q. Q. According to molecular orbital theory, explain why Be2 molecule does not exist ?

Q. what is the maximum no of orbitals that can be identified with the following Qnos?n=3, l=1, m=0

Q. Assertion: The $O-O$ bond length in $H_2{O}_2$ is shorter than that of $O_2{F}_2$.
Reason: $H_2{O}_2$ is an ionic compound.

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> AIIMS 2003

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

Q. Match the orbital overlap figures shown in column I with the description given in column II and select the correct answer using the codes given below

1. A-4, B-3, C-2, D-1
2. A-1, B-2, C-3, D-4
3. A-2, B-3, C-1, D-4
4. A-4, B-1, C-2, D-3

Q.

Explain the structure of CH₄ by using VBT .

Q.

im molecular orbital theory while arranging in increasing order of energy why is (π2p _x = π2p _y ?

Q. Which of the following molecule have only one $p\pi -d\pi$ bond and zero $p\pi -p\pi$ bonds?

1. $Cl{O}_3^{-}$
2. $S{O}_2$
3. $Cl{F}_3$
4. $S{O}_3^{2-}$