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CBSE Questions for Class 11 Medical Chemistry Chemical Bonding And Molecular Structure Quiz 7 - MCQExams.com

The dipole moment of is 1.5 D. The dipole moment of?
1119897_34e34c9cef4543d0b06aa8ac7f4aa57f.png
  • 0 D
  • 1.5 D
  • 2.86 D
  • 2.25 D
The molecular orbital shown below can be described respectively as ?
1121443_f02e2ec0809b4841bf3c9eb1c9f707c2.GIF
  • σ,σ
  • π,π
  • π,π
  • π,σ
16g of sulphur completely reacts with 38 g of F2 to form SFx. The value of x is: 
(Atomic mass of F=19)
  • 1
  • 2
  • 4
  • 6
In the given structure of compound, the correct various bond moments direction involving atoms are shown as:
  • BrNCH2SiH2H2OCH3
  • BrNCH2SiH2CH2OCH3
  • BrNCH2SiH2CH2OCH3
  • BrNCH2SiH2CH2OCH3
On treatment of the following compound with a strong acid, the most susceptible site for bond cleavage is:
1121871_f1d1be8250f54b42ae020434072c674c.GIF
  • C1O2
  • O2C3
  • C4O5
  • O5C6
Which of the following molecule is theoretically not possible?
  • SF4
  • OF2
  • OF4
  • O2F2
Which combination of atomic orbital is correct for σ-bond formation?
  • sPz
  • sPx
  • sPy
  • All are correct
What is the nature of chemical bonding between Cs and F?
  • lonic
  • Covalent
  • Coordinate
  • Metallic
3B2H6+6NH3slowheatinglowT3XHeat2Y+12H2. In the anionic part of the intermediate X covalency of the central atom is:
  • 2
  • 4
  • 6
  • 8
NH3(excess) +3Cl2A+N2; the bond present in compound A is?
  • Ionic, Covalent and dative
  • Ionic and covalent
  • Dative and ionic
  • Dative only
What is correct increasing order of bond lengths of bond indicated as I,II,III, and IV in the following compounds?
1126343_95ce7a01f48e4947a8b0928d2746eec6.png
  • I<II<III<IV
  • II<III<IV<I
  • IV<II<III<I
  • IV<I<II<III
Lone pair of electrons are electrons in orbitals?
  • Which does not undergo hybridization
  • Which undergoes hybridization
  • Which undergoes hybridisation and participate in Bond formation
  • Which undergo hybridization but not participate in Bond formation
Correct order of dipole moment is:
  • CH3F>CH3Cl>CH3Br>CH3I
  • CH3F>CH3Br>CH3Cl>CH3I
  • CH3Cl>CH3F>CH3Br>CH3I
  • CH3F>CH3I>CH3Cl>CH3Br
Among the following molecular orbitals, how many have at least one nodal plane ?
σ1s,σ2s,σ2pz,π2px,π2py,σ2pz
  • 4
  • 5
  • 2
  • 6
The increasing order of dipole moment
A.  SO2(X),     B.H2O(Y),      C.CO2(Z)  is  [ X>Y>Z ]

  • True
  • False
In the given, lewis structure of S2O23 formal charge present on sulphur atoms 1 and 2 respectively are:
1131583_ec55d72352944d3f88ce6362414b23f0.png
  • zero, +1
  • +1,+1
  • +2,+2
  • zero, zero
1 mole of H3PO4 having
  • Two π- bond
  • six mole of σ-bond
  • Sixteen lone pair of electron
  • seven  σ-bond
Which bond angle θ would result the maximum dipole moment for the triatonuc molecules XY2 as shown below?
1130124_6099a52aef8340669f51f3958dd25aff.png
  • 90o
  • 120o
  • 150o
  • 180o
In P_4O_6, the number of P-O bonds and number of lone pairs on P are:
  • 12 and 4
  • 8 and 8
  • 12 and 16
  • 12 and 12
For which of the above molecules dipole moment \mu \neq 0?

1128319_d27779045132427ebc57659b1998bcf1.png
  • Only (c)
  • (c) and (d)
  • only (a)
  • (a) and (b)
Which of the following has dipole moment ?
  • H_2S
  • CO_2
  • CCl_4
  • BF_3
Which of the following has the weakest carbon-chloride bond?
  • CH_2=CH-CI
Find out the species with zero dipole moment
(i) trans-{CH}_3{CH}=CHCI
(ii) {CS}_{2}
  • only one 
  • i and ii
  • ii only
  • none of these
The inter nuclear distance in H_2 and Cl_2 molecules are 74 and 198 pm. respectively. The bond length of HCl may be:
  • 136 \,pm
  • 272 \,pm
  • 135.919 \,pm
  • 271.919 \,pm
Non - zero dipole moment is shown by :
  • CCl_4
  • CS_2
  • H_2O
  • p-Cl-C_6H_4-Cl
Which of the following has zero value of dipole moment:
  • Benzene
  • Naphthalene
  • p-dichlorobenzene
  • all the these
Which of following has been arranged in order of decreasing dipole moment?
  • CH_{3}CI> CH_{3}F> CH_{3}Br> CH_{3}I
  • CH_{3}F> CH_{3}CI> CH_{3}Br> CH_{3}I
  • CH_{3}CI> CH_{3}Br> CH_{3}I> CH_{3}F
  • CH_{3}F> CH_{3}CI> CH_{3}I> CH_{3}Br
Most acidic among the following is
With a change in hybridization of the carbon bearing the charge, the stability of a carbanion decreases in the order
  • sp < { sp }^{ 2 } < { sp }^{ 3 }
  • sp < { sp }^{ 3 } < { sp }^{ 2 }
  • { sp }^{ 3 } < { sp }^{ 2 } < sp
  • { sp }^{ 2 } < sp < { sp }^{ 3 }
Which of the following molecules(s) have dipole moment?
I)Trans-pent-2-ene
II)cis-hex-3-ene
III)2,2-Dimethyl propane
IV)2,2,3,3-tertramethyl butane
  • I,II
  • II,III
  • I,III
  • I,IV
The number of antibonding electron paris in {O}_{2}^{2-} molecular ion on the basis of molecular orbital theory are (At. no O=8)
  • 2
  • 3
  • 4
  • 5
Which of the following is the decreasing order of their dipole moments?
  • {NH}_{3}> {BF}_{3}> {NF}_{3}
  • {NH}_{3}> {NF}_{3}> {BF}_{3}
  • {BF}_{3}> {NH}_{3}> {NF}_{3}
  • {BF}_{3}> {NF}_{3}> {NH}_{3}
Formal charge on nitrogen and oxygen in NO^-_3 ion are respectively: 
  • 0, \dfrac{-1}{3}
  • +1, \dfrac{-1}{3}
  • +1, \dfrac{-2}{3}
  • 0, \dfrac{-2}{3}
The compoumd with no dipole moment is:
  • {CH}_{3}Cl
  • C{Cl}_{4}
  • methylene chloride ({CH}_{2}{Cl}_{2})
  • chloroform (CH{Cl}_{3})
WHich of the following substance has dipole moment more than zero?
  • Water
  • Methane
  • Carbon dioxide
  • Nitrogen
Effective overlapping will be shown by :
  • All of these
The dipole moment of m-dichlorobenzene is 1.5 D. The value of dipole moment of o-dichlorobenzene is
  • 0.02 D
  • 1.5 D
  • 2.6 D
  • 2.12 D
Molecule AB has a bond length of 1.617 A and a dipole moment of 0.38 D. The fractional charge on each atom (absolute magnitude) is :
 ({ e }_{ 0 }=\quad 4.802\quad \times \quad { 10 }^{ -10 } esu)
  • 0
  • 0.05
  • 0.5
  • 1.0
Which of the following involves transfer of five electrons?
  • MnO_4^ - \to M{n^{2 + }}
  • CrO_4^{2 - } \to C{r^{3 + }}
  • MnO_4^{2 - } \to Mn{O_2}
  • C{r_2}O_7^{2 - } \to 2C{r^{3 + }}
The correct order of increasing bond angles in the following triatomic species is
  • NO_2^+ < NO_2 < NO_2^-
  • NO_2^+ < NO_2^- < NO_2
  • NO_2^- < NO_2^+ < NO_2
  • NO_2^- < NO_2 < NO_2^+
Which of the following statements is true about hybridization ?
  • Hybrid orbitals frequently undergo linear overlaps making sigma bonds.
  • Hybrid orbitals frequently undergo lateral overlaps maing \pi-bonds. In other words, there are several compounds in which \pi-bonds are formed using hybrid orbitals.
  • Hybrid orbitals are molecular orbitals.
  • A hybrid orbital bigger in size makes shorter bond.
Which one of the following has the strongest O-O bond?
  • O_{2}^{+}
  • O_{2}
  • O_{2}^{-}
  • O_{2}^{2-}
In 2sp hybridization, 2s-orbital can be mixed with
  • Only 2p_x
  • Only 2p_y
  • Only 2p_z
  • Any one of 2p_x,2p_y and 2p_z
One of the resonating structure of SO_{4}^{-2} is as shown.
Which set formal charge on oxygen and bond order is correct?
1154766_a1f7d649f4144038854f78abd0b0592c.png
  • -0.5 and 1.5
  • 1.5 and 3
  • 2 and 3
  • 1.5 and 1.5
If the dipole moment  of C-Cl bond is 1.2 D,   then the resulting value of dipole moment in:
1178317_9f2e23389cbd440f8f6a5d741c41f72b.png
  • 1.2 and 0.6 respectively
  • 0.6 and 1.2 respectively
  • Less than 1.2 D  and more than 1.2 D   respectively
  • More than 1.2 D in both
Which of the following has least dipole moment:
  • NF_3
  • CO_2
  • SO_2
  • NH_3
The bond angle and hybridization in ether (CH_3OCH_3) is ______.
  • 106.51^0 ,  sp^{2}
  • 110^0 , sp^3
  • 109.28^0,  sp^3
  • None of these.
Choose  the correct options:

  • In O_2F_2, the O-F bond length is lesser than expected value.
  • In trislyl amine (SiH_3)_3N, the bond length is lesser than expected value
  • The bond angle in OF_2 is lesser than in Cl_2O
  • The Be atom in BeCl_2(s) is sp^3 hybridised.
The dipole moment of chlorobenzene is 1.73 D. The dipole moment of p-dichlorobenzene is excepted to be:
  • 3.46 D
  • 0.00 D
  • 1.73 D
  • 1.00 D
Which of the following has the highest dipole moment?
  • AsH_3
  • SbH_3
  • PH_3
  • NH_3
0:0:1


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