CBSE Questions for Class 11 Medical Chemistry Chemical Bonding And Molecular Structure Quiz 6 - MCQExams.com

The bond length in $$CO$$ is $$1.128 \dot A $$. What will be the bond length of $$CO$$ in $$Fe{ \left( CO \right)  }_{ 5 }$$?
  • $$1.158\dot A $$
  • $$1.128\dot A $$
  • $$1.078\dot A $$
  • $$1.118\dot A $$
Which of the following compound has zero dipole moment?
  • $$1, 1-$$ Dichloro ethylene
  • Cis$$- 1, 2-$$ dichoroethylene
  • Trans$$-1, 2 -$$dichoroethylene
  • Both $$2$$ and $$3$$
Order of the bond strength of $$C-H$$ bonds involving sp, $$sp^2$$ and $$sp^3$$ hybridized carbon atoms is:
  • $$sp \, > \, sp^2 \, > \, sp^3$$
  • $$sp^3 \, > \, sp^2 \, > \, sp$$
  • $$sp^2 \, > \, sp^3 \, > \, sp$$
  • $$sp^2 \, > \, sp \, > \, sp^3$$
The magnetic moment of a complex ion is $$2.83$$BM. The complex ion is
  • $$[V(H_2O)_6]^{3+}$$
  • $$[Cr(H_2O)_6]^{3+}$$
  • $$[Cu(CN)_4]^{2-}$$
  • $$[MnCl_4]^{2-}$$
Which has maximum dipole moment?
Which of the following does not contain co-ordinate bond?
  • $$\overset { + }{ PH_ 4 }$$
  • $$NO_2$$
  • $$O_3$$
  • $$CO^{2-}_{3}$$
Which of the following has zero dipole moment?
1044126_17a9bc3ae77740388d7fa67991f763c4.png
  • I & II
  • II & III
  • II & IV
  • III & IV
In covalency:
  • Electrons are transferred
  • Electrons are equally shared
  • The electron of one atom are shared between two atoms
  • None of the above
Which among the following have zero dipole moment?
  • cis-$$C_2H_2Cl_2$$
  • trans-$$C_2H_2Cl_2$$
  • $$PCl_3$$
  • $$2-$$Pentene
The molecule which has zero dipole moment is:
  • $$CH_2Cl_2$$
  • $$BF_3$$
  • $$NF_3$$
  • $$ClO_2$$
Which of the following molecule is having shortest bond length of $$C-O$$ bond?
  • $$CH_3OH$$
  • $$H_2CO$$
  • $$CO$$
  • $$Na_2CO_3$$
The correct order of $$C-N$$ bond length in the given compounds is :
$$P:CH_{3}CN \quad Q:HNCO \quad R:CH_{3}CONH_{2}$$
  • $$P>Q>R$$
  • $$P=Q=R$$
  • $$R>Q>P$$
  • $$R>P>Q$$
Among $${ KO }_{ 2 },{ AIO }_{ 2 }^{ - },{ BaO }_{ 2 }\ and\ { NO }_{ 2 }^{ + }$$, unpaired electron is present in :
  • $${ NO }_{ 2 }^{ + }\quad and\quad { BaO }_{ 2 }$$
  • $${ KO }_{ 2 }\quad and\quad AI{ O }_{ 2 }^{ - }$$
  • $${ KO }_{ 2 }$$ only
  • $$Ba{ O }_{ 2 }$$ only
Which of the following molecules has dipole moment greater than zero?
  • 3-3-Diethylpentane
  • trans-2-pentene
  • 2,2,3,3-tetramethyl butane
  • Neopentane
Among the alkaline earth metals, the element forming predominantly covalent compound is :
  • Be
  • Mg
  • Sr
  • Ca
Which statement is correct :-
  • All the compounds having polar bonds, have dipole moment
  • $$SO_{2}$$ is non-polar
  • $$H_{2}O$$ molecule is non polar, having polar bonds
  • $$PH_{3}$$ is polar molecule having non polar bonds
Which of the following is the strongest bond?
  • $$Na - Cl$$
  • $$Cs - Cl$$
  • Both $$(A)$$ and $$(B)$$
  • None of these
Which of the following compounds has dipole moment approximately equal to that of chlorobenzene?
  • o-dichlorobenzene
  • m-dichlorobenzene
  • p-dichlorobenzene
  • p-chloronitrobenzene
Which of the following pair of molecules posses have permanent dipole moment?
  • $${ NO }_{ 2 }\quad and\quad { CO }_{ 2 }$$
  • $${ NO }_{ 2 }\quad and\quad { O }_{ 3 }$$
  • $${ SiF }_{ 4 }\quad and\quad { CO }_{ 2 }$$
  • $${ SiF }_{ 4 }\quad and\quad { NO }_{ 2 }$$
Number of $$\sigma$$ and $$\pi$$ bonds in $$C_{2}$$ molecule is/are:
  • $$1\sigma$$ and $$1\pi$$
  • $$1\sigma$$ and $$2\pi$$
  • $$2\pi$$ only
  • $$1\sigma$$ and $$3\pi$$
Select correct statement (s) regarding $$\sigma$$ and $$\pi-$$bonds.
  • $$\sigma-$$ bond lies on the line joining the nuclei of bonded atoms
  • $$\pi-$$ electron cloud lies on either side to the line joining the nuclei of bonded atoms
  • $$(2p_{\pi}-3d_{\pi})$$ pi-bond is stronger than $$(2p_{\pi}-3d_{\pi})$$ pi-bond.
  • $$\sigma-$$bond has primary effect of decide direction of covalent bond, while $$\pi-$$bond has no primary effect in direction of bond
Arrange the compounds in decreasing order of their dipole moment.
1068602_1fd42aedbd2d470690ec3ae43e0e79e1.PNG
  • IV> III> I> II
  • IV> I> III> II
  • I> III> IV> II
  • I> IV> III> II
Dipole moment $$\propto $$ diff.in $$e^{-}$$ unity is $$HF > HCl > HBr > HI$$
  • True
  • False
Numbers of $$\sigma$$ and $$pi$$ bonds in $$C_{2}$$ molecule is/are:
  • $$1\sigma$$ and $$1\pi$$
  • $$1\sigma$$ and $$2\pi$$
  • $$2\pi$$ only
  • $$1\sigma$$ and $$3\pi$$
Which of the following compounds has dipole moment approximately equal to half of chlorobenzene?
  • $$o-$$dicholorobenzene
  • $$m-$$dicholorobenzene
  • $$p-$$dicholorobenzene
  • $$p-$$choloronitrobenzene
Which (have) zero value of dipole moment?
  • $$XeF_4$$
  • $$CHCl_3$$
  • $$CO_2$$

The number of $$C - C$$ sigma bonds present in the given compound:
1084916_85bbf5a67687453cae3038960965c2ed.png
  • $$16$$
  • $$14$$
  • $$18$$
  • $$11$$
$$S-S$$ bond is present in:
  • $$\alpha - (SO_3)_n$$
  • $$\gamma (S_3O_9)$$
  • $$H_2S_2O_3$$
  • $$H_2S_2O_8$$
Which compound has non-zero dipole moment?
The correct order of increasing bond length of $$C-H$$, $$C-O$$, $$C-C$$ and $$C=C$$ is :
  • $$C-H\ <\ C-O\ <\ C-C\ <\ C=C$$
  • $$C-H\ <\ C=C\ <\ C-O\ <\ C-C$$
  • $$C-C\ <\ C=C\ <\ C-O\ <\ C-H$$
  • $$C-O\ <\ C-H\ <\ C-C\ <\ C=C$$
Which of the following molecule does not possess a permanent dipole moment?
  • $$CS_2$$
  • $$SO_{3}^{2-}$$
  • $$H_2S$$
  • $$SO_2$$
Select the molecule that has one $$pi\ bond$$?
  • $$CH=CH$$
  • $${CH}_{2} =CH-CHO$$
  • $${CH}_{3}-{CH}={CH}_{2}$$
  • $${CH}_{3}-{CH}={CH}-{COOH}$$
Which of the following is not correct?
  • $$\text{A sigma bond is weaker than } \pi \ bond$$
  • $$\text{A sigma bond is stronger than } \pi \ bond$$
  • $$\text{A double bond is stronger than a single bond}$$
  • $$\text{A double bond is shorter than a single bond}$$
A: Tetracyanomethane 
B: Carbondioxide 
C: Benzene
C: $$1,3-buta-di-ene$$
Ratio of $$\sigma$$ and $$\pi$$: 
  • in A and B are equal
  • in C and D are equal
  • is same in A, B, C, and D
  • in B and D are equal
From the given list of compounds whose proton bonding is highest?
  • $$H_2O$$
  • $$H_2S$$
  • $$NH_3$$
  • $$PH_3$$
Which of the following has the maximum value of dipole moment?
In which of the following molecules, bonding is not taking place in excited state:
  • $$CH_4$$
  • $$BF_3$$
  • $$IF_7$$
  • $$PCl_3$$
The molecular that will have dipole moment IS ZERO
  • 2,2-Dimethylpropane
  • Cis-2-butane
  • Trans-2-pentene
  • 2,2,3,3-Tereathylpentane
Peroxide linkage is present in :
  • $$H_2O$$
  • $$BaO_2$$
  • $$OF_2$$
  • $$H_2SO_4$$
The correct order of decreasing bond length of $$C = C$$ in the above compounds is:
1101589_565d433c9c344c92b6110d0b7ca2f73f.png
  • $$II>I>IV>III$$
  • $$III>II>I>IV$$
  • $$IV>II>I>III$$
  • none of the above
In which of the following dimer empty atomic orbital of central atom of monomer does not involve in hybridisation?
  • $$Ga_2H_6$$
  • $$Al_2Br_6$$
  • $$Be_2H_4$$
  • $$Cl_2O_6$$
The dipole moment of a bond $$AB$$ is $$5\ D$$ and its bond distance is $$150\ pm$$. The percentage ionic charactor of this bond is?
  • $$78.5\%$$
  • $$83\%$$
  • $$24\%$$
  • $$69.5\%$$
A diatomic molecule has a dipole moment of 1.2D. If the bond distance is $$1.0 \mathring{A}$$, fraction of an electronic charge on each atom is:
  • $$10\%$$
  • $$20\%$$
  • $$25\%$$
  • $$50\%$$
Which of the following pair of molecules will have permanent dipole moments for both members?
  • $$SiF_{4}$$and $$NO_{2}$$
  • $$ CO_{2}$$ and $$NO_{2}$$
  • $$ CO_{2}$$ and $$O_{3}$$
  • $$SiF_{4}$$ and $$CO_{2}$$
Which of the following has zero dipole moment?
  • $$BF_3$$
  • $$BeClBr$$
  • $$CH_2Cl_2$$
  • COS
If dipole moment of HI is $$0.38$$D and bond length of HI is $$1.6 AA$$, then percentage covalent characted in HI bond is?
  • $$4.95 \%$$
  • $$5.9 \%$$
  • $$95.05 \%$$
  • $$47.5 %$$
The structural formula of a compound is $$CH_3-CH=C=CH_2$$. The type pf hybridization at the four carbon atoms from left to right is?
  • $$sp^2, sp, sp^2, sp^3$$
  • $$sp^2, sp^3, sp^2, sp$$
  • $$sp^3, sp^2, sp, sp^2$$
  • $$sp^3, sp^2, sp^2, sp^2$$
The Hybridisation and magnetic behavior of complex $$[Ni(CO)_{4}]$$ is
  • $$dsp^{2}$$, paramagnetic
  • $$dsp^{2}$$, diamagnetic
  • $$sp^{3}$$, paramagnetic
  • $$sp^{3}$$, diamagnetic
The dipole moment of $$HBr$$ is $$0.78\ \times 10^{-18}$$ esu cm and interatomic spacing is $$1.41\ \mathring {A}$$ The $$\%$$ ionic character of $$HBr$$ is?
  • $$7.5$$
  • $$11.$$
  • $$15$$
  • $$27$$
Which of the following molecule stabilizes by removal of electron?
  • $$C_2$$
  • $$O_2$$
  • $$N_2$$
  • $$H_2$$
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