Chemical Bondin...

Direction (Q. Nos. 1-11) This section contains 11 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE option is correct.

Q.  Assuming that Hund's rule is violated, the bond order and magnetic nature of the diatomic molecule B₂ is 

Which of the following statement is incorrect regarding NO₂ molecule?

Molecule MX₃ (atomic number M < 21) has zero dipole moment, the sigma bonding orbitals used by M are

bond in between (C₂— C₃) vinyl acetylene is formed by ...... overlapping

Hydrogen bonds are formed in many compounds e.g., H₂O, HF, NH₃ . The boiling point of such compounds depends to a large extent on the strength of hydrogen bond and the number of hydrogen bonds. The correct decreasing order of the boiling points of above compounds is :

Considering the state of hybridisation of C-atoms,select the molecule among the following which is linear

In which one of the following species the central atom has the type of hybridisation which si not the same as that present in the other three? 

BF₃ is electron deficient (Lewis acid) and NH₃ is electron-rich (Lewis acid). In 1 : 1 complex of BF₃ and NH₃, then coordination geometry and hybridisation of N and B atoms are :

If there are five electron pairs in outer shell, then structure and bond angle as predicted by Sidgwick-Powell theory is

Hybridisation of Acetylene is

Based on VSEPR model, AX₄E representation is for

Direction (Q. Nos. 12 and 14) This sectionis based on statement I and Statement II. Select the correct answer from the code given below.

Q. 

Statement I : BF₃ molecule is planar but NF₃ is pyramidal.

Statement II : N atom is smaller than B.

Statement I : B atom is sp²-hybridised in B₂H₆.
Statement II : There is no lone pair or unpaired electron in B₂H₆.

Statement I : BCI₃ exists as monomer while AICI₃ exists as dimer.

Statement II : Boron atom is too small to form the stable 4-membered ring system

Direction (Q. Nos. 15-16) This section contains  a paragraph, each describing theory, experiments, data etc. three Questions related to paragraph have been given.Each question have only one correct answer among the four given options (a),(b),(c),(d).

In certain polar solvents, PCI₅ undergoes an ionisation reaction as shown

Q. Select the incorrect statement (s).

In certain polar solvents, PCI₅ undergoes an ionisation reaction as shown

Q. Number of lone pairs on P in I, il and III are

Direction (Q. Nos. 17-18) This section contains 2 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE  is correct.

Q. Match the following compounds given in Column I with their geometry given is Column II
 

Match the processes in Column I with type of changes in hybridisation in Column II.