Idea of Hybridisation

Q. 51 The bond length of CO bond in carbon monoxide is 1.128 . The CO bond in Fe(CO) is (1) 1.158 (2) 1.128 (3) 3.28 (4) 1.118

Q. 22. Species having maximum Cl-O Bond order is :- 1. ClO3- 2. ClO3 3. ClO4- 4. ClO2-

Q.

Promotion of electron is not essential condition prior to hybridization.

1. True

2. False

Q.

Which of the following ions is most stable?

1. (CH₃)₃C - CH₂⁺

2. (CH₃)₃C⁺

3. CH₃CH₂ - CH₂⁺

Q.

Which of the following is not a valid condition for hybridisation?

1. The orbitals present in the valence shell of atoms undergo hybridisation.

2. The orbitals undergoing hybridisation should have almost equal energy.

3. Only half filled orbitals participate in hybridisation.

4. In some cases, even completely filled orbitals of valence shell take part in hybridisation

Q. Which of the following statements is/are incorrect regarding hybridization theory?

1. The atomic orbitals of two atoms mix to form hybrid orbitals
2. The orbitals must be of nearly the same energy for hybridization
3. Number of hybrid orbitals is equal to the number of atomic orbitals involved
4. None of the above

Q. What are ammoniated electrons.Are they free electrons? Then how do they impart colour to the solution of alkalimetals and liquid ammonia if there is no energy levels

Q. is there any nodal plane in σ 2 s orbital ?

Q.

Which of the following hybridisation has highest percentage of s-character

1. sp

2. sp³

3. sp²

4. None of these

Q.

In sp³ hybridization how many atomic orbitals are involved?

1. 3

2. 2

3. 4

4. 1

Q. Q.Among the butane conformers, whenviewed about C2-C3 bond, which occur atenergy minima on a graph of potentialenergy versus dihedral angle?a) Gauche onlyb) Gauchec) Antid) Eclipsed

Q. which pair will show common ion effect?(1) bacl_2+na(no_3{)_{2 } (2) Nacl + hcl (3) nh_4oh + nh_4cl (4) nacn + kc

Q.

$Xe{F}_2$ involves hybridisation

1. $s{p}^3$

2. $s{p}^{3}d$

3. $s{p}^3{d}^2$

4. None of these

Q. what does two electron three center bond in structure of diborane mean ? Explai

Q. Which of the following molecules represents the order of hybridisation $s{p}^2$, $s{p}^2$, $sp$, $sp$ from left to right?

1. ${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{CH}={\mathrm{CH}}_2$
2. ${\mathrm{CH}}_2=\mathrm{CH}-C\equiv \mathrm{CH}$
3. $\mathrm{CH}\equiv C-C\equiv \mathrm{CH}$
4. ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$

Q. Which of the following has maximum angle strain?
a) Cyclopropane
​b) Cyclobutane
​c) Cyclopentane
​d) Cyclohexane

Q. Which of the following carbonium ion is moststable?(1) CH3CH2+(2) CH3+ 3)ph-CH2+ (4)CH2+-phNO2

Q.

The nodal plane in the $\pi$-bond of ethene is located in:

1. the molecular plane

2. a plane parallel to the molecular plane

3. a plane perpendicular to the molecular plane which bisects the carbon - carbon $\sigma$ - bond at right angle.

4. a plane perpendicular to the molecular plane which containes the carbon - carbon σ - bond

Q.

Identify the molecule which undergoes sp² hybridization.

1. BeF₂

2. BeH₂

3. BeCl₂

4. BH₃

Q. We cant obtain methane from wurtz reaction. Am I right?

Q. Answer the given statements as True (T) or false (F).

1. The orbitals which have equivalent energy can take part in hybridisation.
2. The number of hybrid orbitals is equal to the number of atomic orbitals mixed.
3. Hybridisation is a hypothetical concept which includes the mixing of electrons.
4. A hybrid orbital only forms $\sigma$ bond.

1. TTTT
2. TTFF
3. TTFT
4. TTTF

Q. v_olume of CO_2 obtained at STP by the complete decomposition of 9.85gm BaCO_3 i

Q. What is the difference between nodal plane, nodal surface, angular node? Give value of each of these in dz².

Q. PCI Fmolecule will be non-polar for what5 Xvalues of x?(2) 2, 0 and 5(1) 2, 1 and 4(4) 2, 3 and 5(3) 3, 0 and 5

Q. The solid in which positive ions are surrounded by and held together by a sea of free electrons is :

1. Molecular solid
2. Metallic solid
3. Ionic Solid
4. Network Solid

Q.

Promotion of electron is not essential condition prior to hybridization.

1. True

2. False

Q. The Cl-C-Cl bond angle in 1, 1, 2, 2- tetrachloroethene and tetrachloro methane respectively are(1) 120^° and 109.5 (2) 90^° and 109.5^° (3) 109.5^° and 90^°(4) 109.5^° and 120^° ?

Q. The molecule/ ion which has original trigonal pyramidal shape is:
(1) PCl_​3 (2) SO₃ (3) CO₃^2- (4) NO₃^-

Q. What are the possible formulas that are used to calculate bond order of all types of species( multielectron also)?

Q.

Promotion of electrons is not essential prior to hybridisation. what does that mean?