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Which of the following resonating structure is most stable?

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Important Questions on Chemical Bonding and Molecular Structure

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Molecule AB has a bond length of 1.617  and a dipole moment of 0.38 D. The fractional charge on each atom(absolute magnitude) is: (e0=4.802×10-10 esu)
EASY
Which of the alkaline earth metal halides given below is essentially covalent in nature?
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Each of the following options contains a set of four molecules. Identify the option(s) where all four molecules possess permanent dipole moment at room temperature.
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Amongst LiCl, RbCl, BeCl2 and MgCl2 the compounds with the greatest and the least ionic character, respectively are :
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Resonance in carbonate ion CO32- is

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Which of the following is true?

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If enthalpy of atomization for Br2(l) is kJ/mol and bond enthalpy for Br2 is kJ/mol, the relation between them
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The above compound represents hydrogen azide, the bond orders of bonds I and II are:

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In which of the following molecules, all atoms are coplanar?
EASY
Which of the following molecules has the maximum dipole moment?
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The molecule/molecules that has/have delocalised lone pair(s) of electrons is/are

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The bond angle H-O-O in H2O2 in gaseous phase is
HARD
For which of the following molecule significant μ 0 ?


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EASY
The dipole moments of CCl4,CHCl3 and CH4 are in the order
HARD
The number of bonds between sulphur and oxygen atoms in S2O82- and the number of bonds between sulphur and sulphur atoms in rhombic sulphur, respectively are:
EASY
Arrange the following compounds in increasing order of C-OH bond length: methanol, phenol, p -ethoxyphenol
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Which of the following molecules is least resonance stabilized?
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Which of the following compounds does not exhibit resonance ?