19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
The hybridization of the central atom in ICl 2 is:
Which of the following angle corresponds to sp2 hybridisation? C = C M(CO)3 C H NC NC
Diagonal hybridisation is the another name of
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…
In a compound the number of sigma and pi bonds respectively are :
The strength of bonds formed by s-s, p-p and p-s overlap has the order:
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 …
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 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
VBT theory is based on the
FAsF bond angle in AsF3Cl2 molecule is:
Which of the following are isoelectronic and isostructural? NO ,CO ,ClO ,SO (a) NO ,CO (b) SO ,NO (c) ClO ,CO (d) CO ,ClO Ans. (a) Sol. Both have 32 electrons and have trigonal planar shape.
Which is not correctly matched?
The shapes of XeF4, Θ XeF and SnCl2 are:
Which of the following pairs of species have identical shapes? (a) NO and NO
Match the following Column and choose the correct option from the codes given below. Column I Column II A. BeCl2 1. Linear B. BF3 2. Trigonal planar C. CO2 Codes : A B C (a) (b) (c) (d) Ans. (c) Sol. BeCl2, CO2 linear…
Shape of XeF4 is
The species having pyramidal shape is
The shape of the molecule depends on the _______