Chemistry Question Bank

The number of anti-bonding electron pairs in O molecular ion on the basis of molecular orbital theory is (atomic no. of O is 8):

The ion that is isoelectronic with CO is:

The ground state electronic configuration of valence shell electrons in nitrogen molecule (N2) is written * , , 2 , 2p 2p x y z s s p .Hence,the bond order in nitrogen molecule is :

Which of the following is paramagnetic? (a) O

Take NA as the number of Anti-bonding molecular orbitals and NB as the number of Bonding molecular orbitals. The molecule is stable when NA ____________ NB. a) is greater than b) is equal to c) is less than d) is grea…

Which one of the following species is diamagnetic in nature ? (a) H (b) H (c) H (d) He

Which of the following have identical bond order? (I) CN– (II) O2 (III) NO+ (IV) N2

The molecular orbitals like atomic orbitals are filled in accordance with the

The number of molecular orbitals formed is equal to the number of combining atomic orbitals. When two atomic orbitals combine, two molecular orbitals are formed one is known as bonding molecular orbital while the othe…

The condition to form a molecular orbital from atomic orbital 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

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

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

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

Which of the following statements is incorrect for PCl5?

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

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

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

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…

CH2 = C = CH2 In this molecule (allene)

Cl–C2 bond of this molecule is formed by

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

Which of the following orders is correct for electronegativity?

In sp2 orbital, character of pz orbital will be

CH3 – CH2 – CH = CH2 has hybridisation: