Chemistry Question Bank

The valence bond theory explains the shape, the formation and directional properties of bonds in polyatomic molecules like CH4, NH3 and H2O etc., in terms of

Which of the following does not represent positive overlap? (a) (b) (c) (d) Ans. (b) Sol. Out of phase overlap occurs in (b) Thus, it shows negative overlap.

The strength of covalent bond ___________ extent of overlapping of orbitals. a) may be or may not be related to b) is independent on c) is dependent on d) is not related to Ans. (c) Sol. As per the concept of valence …

The strength of bonds formed by s-s, p-p and p-s overlap has the order:

In a compound the number of sigma and pi bonds respectively are :

Assuming the bond direction to the z-axis, which of the overlapping of atomic orbitals of two-atom (A) and (B) will result in bonding? (I) s-orbital of A and px orbital of B (II) s-orbital of A and pz orbital of B (II…

Diagonal hybridisation is the another name of

Which of the following angle corresponds to sp2 hybridisation? C = C M(CO)3 C H NC NC

The hybridization of the central atom in ICl 2 is:

The state of hybridization of the central atom is not the same as in the others:

CH3 – CH2 – CH = CH2 has hybridisation:

In sp2 orbital, character of pz orbital will be

Which of the following orders is correct for electronegativity?

The orbitals used by C in forming C–H and C–Cl bonds of CH2Cl2 are

Cl–C2 bond of this molecule is formed by

CH2 = C = CH2 In this molecule (allene)

What type of hybridization does a BCl3 molecule undergo? a) sp b) sp2 c) sp3 d) sp3d Ans. (b) Sol. In the BCl3 molecule, one s-orbital and two p- orbitals intermix and form three equivalent hybrid orbits. Therefore it…

Isostructural species are those which have the same shape and hybridisation. Among the given species identify the isostructural pairs.

In which of the following pairs, both the species have the same hybridization? (I) SF4, XeF4 (II) - I ,XeF (III) ICl ,SiCl (IV) - 3- ClO ,PO

Which one of the following is the correct set with respect to molecule, hybridization and shape ?

Which of the following statements is incorrect for PCl5?

Select pair of compounds in which both have different hybridization but have same molecular geometry:

The hybridization of atomic orbitals of the central atom “Xe” in XeO4, XeO2F2, and XeOF4 respectively.

The structure and hybridization of Si(CH3)4 is :

The increasing order of energies of various molecular orbitals are I. ls < ls < 2s < ( 2 ) ( ) II. ls < ls < 2s < ( 2 ) ( ) z x y x y z x y z x y z s P P P P P P s P P P P P P