The spacies having no pπ-pπ bond but has bond order equal to that of O2

(a) CIO-3      (b) PO43-   

(c)SO42-    (d) XeO3

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Which pair of atom form strongest ionic bond?

(a) Al and As

(b) Al and N

(c) Al and Se

(d) AL and O

Concept Questions :-

Ionic Bonding
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The correct order of increasing s-character (in percentage) in the hybrid orbitals of the following molecules/ions is:

(i) CO32-           (ii) XeF4                (iii) I3                     (iv) NCI3                         (v) BeCl2

(a) (ii)<(iii)<(iv)<(i)<(v)                             (b) (ii)<(iv)<(iii)<(v)<(i)

(c) (iii)<(ii)<(i)<(v)<(iv)                             (d) (ii)<(iv)<(iii)<(i)<(v)

Concept Questions :-

Hybridisation
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How many resonance forms can be written for the nitrate ion, (NO3-)?

(a) 1

(b) 2

(c) 3

(d) 4

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Which of the following molecule will have all equal XF bond length? (where X= central atom)

(a) SOCl2F2                                                     (b) SeF4(c) PBr2F3                                                          (d) IF7

Concept Questions :-

Hybridisation
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Which of the following fact is directly explained by the statement 'oxygen is a simillar atom than sulpher'?

(a) H2O boils at a much higher tempreture than H2S

(b) H2S undergoes intermolecure hydrogen bonding

(c) H2O is liquid and H2S is gas at room tempreture 

(d) SH bond is longer than OH bond

Concept Questions :-

Hybridisation
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Among given species identify the isostructural pairs:

(a) NF3  and BF3

(b) BF4- and NH4+

(c) BCl3 and BrCl3

(d) NH3 and NO3-

Concept Questions :-

Covalent Bonding
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Consider the following information (X=F or Cl)

Molecule     P-X(axial)       P-X(Equitorial) 

                 bond length     bond length

PF5                     a                        b

PF4CH3            c                        d

PF3(CH3)2       e                       f

PCl5                   g                      h

According to information choose the incorrect order of bond length :

(a)g>a>d>b                                             

(b) g>e>f>b

(c) f>d>a>b                                             

(d) c>f>d>b

Concept Questions :-

Hybridisation
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In which of the following cases CC bond length will be highest?

(a) CH3CF3                               (b) FCH2CH2F

(c) F2CH                                       (d) CF3CF3

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The ratio of σ / π bond  in tetracyano ethylene is: 

(a) 2:1

(b) 1:1

(c) 1:2 

(d) none of these 

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