19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
According to Kossel and Lewis approach, the outer shell can accommodate a maximum of …X… electrons. Here, X refers to
Kossel and Lewis approach was based on the
The attractive force which holds various constituents (atoms, ions etc.) together in different chemical species is called a
The correct order of the strength of H-bonds is:
Which one of the following molecules will form a linear polymeric structure due to hydrogen bonding?
What type of intermolecular forces are due to the attraction between temporary dipoles and their induced temporary dipoles?
Which of the following molecule can form a hydrogen bond?
Which of the following molecules do show the hydrogen bonding? I. CCl3CH(OH)2 II. o-hydroxy benzoic acid
The boiling point of a substance increases with increase in
Metallic bond is.
Which of the following molecules have same bond order? H2, He2, C2 and O2
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…
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…
Which one of the following is not paramagnetic?
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