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The correct order of decreasing bond lengths of CO, CO2 and C032- is
As the bond order increases, bond length
The correct sequence of bond length in single bond,double bond and triple bond of C is
Which of the following willbe the strongest bond?
Bond strength ∝ Difference in electronegativity
Arrange the following in increasing order of covalent character - NaCl, MgCl2, AICI3
Cation size is decreasing in the order:
Ne+ > Mg2+ > Al3+
Al3+ has maximum polarisation effect and Na+
has minimum polarisation effect.
The covalent nature is in the order : AlCl3 > MgCl2 > NaCl
Match the bond enthalpies given in column II with the molecules given in column I and mark the appropriate choice.
The order of bond enthalpies of the bonds is
given as. Bond order ∝ Bond enthalpy
Hence, single bond enthalpy < double bond enthalpy < triple bond enthalpy
H − H < O = O < N ≡ N
The given structures I, II and III of carbonate ion represent
The structures represent canonical or resonating structures of carbonate ion.
Which of the following molecules does not show any resonating structures?
NH3 does not show any resonating structure due to the absence of double bond.
The canonical or resonating structures of a molecule required to describe the structure of a molecule follow which of the following rules?
Canonical structures differonly in the position
of electrons not in number of paired and unpaired electrons.
Arrange the following in order of increasing dipole moment: H2O, H2S,BF3
In BF3, dipole moment is zero due to its
symmetrical structure. Summations of all dipoles is zero.
In H2S and H2O due to unsymmetrical structure net +ve dipole is there. H2O has a higher dipole due to the higher electronegativity of oxygen than sulphur.
Which of the following is non-polar?
Since the dipoles are in opposite directions, the net dipole moment is zero.
Although F is more electronegative than H, the resultant dipole moment of NH3 is much more than that of NF3. It can be explained as
In a diatomic molecule the bond distance is 1X10-8 cm. Its dipole moment is 1.2 D. What is the fractional electronic charge on each atom?
(4.8 X10-10 is a theoretical value of μ..)
Which of the following are arranged in the decreasing order of dipole moment?
The values of dipole moments of methyl halides:
In water molecule, the two O—H bonds are oriented at an angle of 104.5°. In BF3, the tliree B—F bonds are oriented at an angle of 120°. In BeF2, the two Be—F bonds are oriented at an angle of 180°. Which of the following will have highest dipole moment?
BeF2 : μ = 0
What is the correct dipole moment of NH3 and NF3 respectively?