19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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:
Which one of the following species is diamagnetic in nature ? (a) H (b) H (c) H (d) He
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 of the following is paramagnetic? (a) O
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 :
The ion that is isoelectronic with CO is:
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):
Which one of the following is not paramagnetic?
Using MO theory, predict which of the following species has the shortest bond length? (a) O (b) O (c) O (d) O Ans. (d) Sol. As we know, Bond length 1/bond order. In option A, Ohas bond order 2.5 In option B, Ohas bo…
Accordingly MO theory (a) O is paramagnetic and bond order is greater than O2. (b) Ois paramagnetic and bond order is less than O2. (c) Ois diamagnetic and bond order is less than O2. (d) Ois diamagnetic and bond orde…
Which of the following molecules have same bond order? H2, He2, C2 and O2
Metallic bond is.
The boiling point of a substance increases with increase in
Which of the following molecules do show the hydrogen bonding? I. CCl3CH(OH)2 II. o-hydroxy benzoic acid
Which of the following molecule can form a hydrogen bond?
What type of intermolecular forces are due to the attraction between temporary dipoles and their induced temporary dipoles?
Which one of the following molecules will form a linear polymeric structure due to hydrogen bonding?
The correct order of the strength of H-bonds is: