Jee 2014 Booklet2 Hwt Solutions Chemical Bonding

Vidyamandir Classes

Solutions to Home Work Test/Chemistry Chemical Bonding 2.(C)

Triple bond has the max-value of bond energy.

3.(B)

(A)

(B)

HWT - 1

(C)

(D)

PbCl2 is ionic

Note : Don’t worry if you don’t understand these structures they will be done in class sometime in future. 4.(C)

BF4 , SO42 and XH 4 all have tetrahedral geometry. Only XeF4 has octahedral geometry.

7.(D)

Note : You will make these structure in class. 8.(A)

To be done in class but here you can also think that none of the other given compounds have any atom having a ‘d’ orbital so the question of having P  d back bonding does not arise in them.

Chemical Bonding

HWT - 2

1.(D)

Note : When we have a choice b/w double and triple bond. Double bond is given lowest numbering. 2.(B)

3.(B) 10.(C)

18 e  configuration means (n  1) p6 (n  1)d10 ns2 config. It is also called as pseudo inert / noble gas configuration. To be precise elements that have a completely filled valence orbital but differ in all properties w.r.t. the elements of the zeroth group are pseudo noble gas configured elements e.g. in zinc (1s2 2s2 2p6 3s2 3p6 4s2 3d10) the final orbital (4s) is completely filled with electrons so it is said to have pseudo inert gas configuration.

VMC/Chemical Bonding

17

HWT-Solutions/Chemistry

Vidyamandir Classes

Chemical Bonding

HWT - 3

3.(A) 4.(A)

As we go down the group covalent character decreases and also lower the charge on cation, lower is its polorising power and thus lower is the character. By the above logic, PbCl2 is least covalent or most ionic.

5.(B)

Check fajan’s rules

6.(B)

9.(B)

7.(C)

Check that only NO  and N 2 are isoelectronic and rest of the pairs are not. Obviously, both will have same bond order (check yourself from MO theory)

Chemical Bonding

HWT - 4

1.(A) Clearly     180 2.(B)

3.(D)

5.(A)

7.(A)

8.(C)

10.(C)

Read NCERT

Chemical Bonding 2.(C)

Read NCERT (XIIth)

6.(D)

HWT - 5 Read NCERT (XIIth)

9.(D)

VMC/Chemical Bonding

18

HWT-Solutions/Chemistry