In which of the following molecular shape dz2- orbital must not be involved in bonding?

(a) Pentagonal planar 

(b) Trigonal planar 

(c) Linear 

(d) Square planar

Concept Questions :-

Hybridisation
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Consider the following reaction:

MX4+X'2MX4X'2

If atomic number of M is 52 and X and X' are halogens and X' is more electronegative than X.

Then choose correct statement regarding given information:

(a) Both X' atoms occupy axial positions which are formed by overlapping of p and d-orbitals only

(b) All MX bond lengths are identical in both MX4 and MX4X'2 compounds

(c) Central atom 'M' does not use anyone valence non-axial set of d-orbital in hybridization of final product

(d) Hybridization of central atom 'M' remains same in both reactant and final product.

Concept Questions :-

Hybridisation
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Which atom can have more than eight valence electrons when it is forming covalent bond?

(a) H

(b) N

(c) F

(d) Cl

Concept Questions :-

Types of Bonding
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Select the incorrect match:

        Statement                               Shape                                    Example

(a) Bond pair has > 75%                                                 HF

p-character

(b) Reduction in axial bond                                     SF4

is more than that of in 

equatorial bond angle

(c) Two axial d-orbitals and                                       XeF5-

one non-axial d-orbitals are

used in hybridization

(d) Two p-orbitals are used                                               SnCl2

in hybridization

Concept Questions :-

Hybridisation
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Which bond is expected to be the least polar?

1. O-F

2. P-F

3. Si-N

4. B-F 

 

Concept Questions :-

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Select correct statement(s) :

(a) Acidic strength of HBr>HCl but reverse is true for their reducing property 

(b) Basic strength of PH3>AsH3 but reverse is true for their bond angle

(c) Dipole moment of CH3Cl>CH3F but reverse is true for their HC^H bond angle

(d) Ka1 of fumaric acid is higher than maleic acid but reverse is true for their Ka2

Concept Questions :-

Acid, Base and Fajan's Rule
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Which set contains only covalently bonded molecules?

(a) BCl3 , SiCl4 ,PCl3

(b) NH4Br , N2H4,HBr

(c) I2 ,H2S , NAI

(d) Al2,O3 , AS4

Concept Questions :-

Covalent Bonding
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In which of the following species, d-orbitals having xz and yz two nodal planes involved in hybridization of central atom?

(a) IO2F2-                                  (b) ClF4-

(c) IF7                                       (d) None of these 

Concept Questions :-

Hybridisation
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Select pair of compound in which both have differant hybridization but have same molecular geomatery:

(a)  BF3,BrF3       

(b) ICI2,BeCI2   

(c)BCI3,PCI3   

(d) PCI3,NCI3

Concept Questions :-

Hybridisation
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Which molecule does not exist?

(a) OF2

(b) OF4

(c) SF2

(d) SF4

Concept Questions :-

Covalent Bonding
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