Correct order of strength of H-bond in the following compounds is : 

(1) H2O  > H2O2 > HF > H2S 

(2) HF  H2O2 > H2O > H2S

(3) HF >H2O > H2S > H2O2

(4) HF >H2O2 > H2O > H2S

  

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
 52%
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Molecule having non-polar as well as polar bonds but the molecule as a whole is polar:

(a) S2F2 

(b) N2O4

(c) Si2H6                                           

(d) I2Cl6

Subtopic:  Polarity |
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Choose the correct statement regarding SeOCl2 molecule:

1. It does not contain a plane of symmetry

2. 'Cl-Se^-Cl' bond is greater than 'Cl-Se^-O' bond angle

3. Lone pair has greater than 33.3% s-character

4.  Central atom used one d-orbital in bonding.

Subtopic:  V.S.E.P.R & V.B.T |
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Which of the following compounds can form H-bonding with each other? 

(a) CH3 COOH and H2O

(b) Phenol and CH4

(c) CHF3 and acetone

(d) PH3 and HF

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
 74%
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Which of the following compound is planar and non-polar?

(1) Xe O4

(2) Sf4

(3) Xe f4

(4) Cf4

Subtopic:  Polarity |
 61%
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The incorrect statement(s) regarding CX3 species is:

(1) If electronegativity of surrounding element 'X' is less than 2.5, then central carbon atom used almost 33% s-character in their hybrid bonding orbitals

(2) If electronegativity of surrounding element 'X' is more than 2.5, then central carbon atom used almost 25% s-character in their hybrid bonding orbitals

(3) If 'X' is 'F', then species should be polar and pyramidal

(4) If 'X' is H, then species should be polar and planar

Subtopic:  Polarity |
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H2O has a net dipole moment while BeF2 has zero dipole moment because :

(1) F is more electronegativity than oxygen 

(2) Be is more electronegativity than oxygen 

(3) H2O  molecule is linear and BeF2 is bent 

(4) BeF2 molecule is linear and H2O is bent

Subtopic:  Polarity |
 85%
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Which of the following overlops is incorrect (assuming Z axis internuclear axis)?

(A) 2py +2pyπBond formation        (B) 2px+2pxσBond formation

(C) 3dxy+3dxyπ Bond formation        (D) 2s+2pyπBond formation

(E)3dxy+3dxyδBond formation             (F)2pz+2pzσ Bond formation

(a) A,B,C                      (b) C,F

(c) B,E                         (D) B,C,D

Subtopic:  Types of Chemical Bond |
 57%
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How many sigma bonds are in a molecule of diethyl ether, C2H5OC2H5

1. 14         

2. 12         

3. 8         

4. 16

Subtopic:  Types of Chemical Bond |
 80%
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Which of the following species has a zero dipole moment?

(i) CO2 (ii) COCl2 (iii) CH2 Cl2 (iv) BCl3

1. (i) and (iv)  2. (ii) and (iv) 
3. (iii) and (iv)  4. (i), (iii) and (iv) 

Subtopic:  Polarity |
 65%
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