1108 + Interview Questions in CHEMICAL-BONDING IN GENERAL AWARENESS Page 15 InterviewSolution

701.	The correct stability order of the following resonance structrue is : `H_2 C = overset (+)(N) = overline(N) ` `H_2 overset (+)C = (N) = overline(N) ` `H_2overline( C) - overset (+) (N) -= N` `H_2overline( C) - overset (+) (N) -= N`.A. ` (I) gt (II) gt (IV) gt (III)`B. ` (I) gt (III) gt (II) gt (IV)`C. ` (II) gt (I) gt (III) gt (IV)`D. `(III) gt (I) gt (IV) gt (II)`
Answer» Correct Answer - B `underset("-ve charge on carbon")underset("Octet complete")underset((III)) underset(H_(2)overset(-)(C)overset(+)(N)equivoverset(-)(N))underset("-ve charge on bitrogen")underset("Octet complete")underset((I))(H_(2)C=overset(+)(N)=overset(-)(N))" "underset("-ve charge on carbon")underset("Octet complete")underset((IV)) underset(H_(2)overset(-)(C)-(N)equivoverset(+)(N))underset("-ve charge on bitrogen")underset("OCtet complete")underset((I))(H_(2)overset(+)(C)-N=overset(-)(N)`.

Discussion

702.	This section contains some integer type question Estimate the percent ionic character of the HBr molecule, given that the dipole moment `(mu)` is 0.63 D and HBr bond length 187.5 pm
Answer» Correct Answer - 7 Calculated value of `mu=exxl` `=4.8xx10^(-10)esuxx187.5 xx10^(-10)cm` `=9xx10^(-18)esu cm ` `(1xx10^(-18)esu-cm=1"Debye")=9 Debye` Observed value of `mu=0.63` debye ltbr. % ionic character =`("Observed value x 100)/("calculated value")` `=0.63/9xx100=7%`

Discussion

703.	The correct stability order of the following resonance structure is A. `IgtIIgtIVgtIII`B. `IgtIIIgtIIgtIV`C. `IIgtIgtIIIgtIV`D. `IIIgtIgtIVgtII`
Answer» (b) I has maximum covalent bond and negative charge on electronegative nitrogen, most stable. III has more convalent bond than both II and IV, III is second most stable .II is more stable than IV, since it has negative charge on nitrogen. So the order is `I gt III gt II gt IV`

Discussion

704.	The bond angle and dipole moment of water respectively are `:`A. `105.5^(@)`, 1.84DB. `107.5^(@)`, 1.56 DC. `104.5^@`, 1.84 DD. `102.5^@` , 1.56 D
Answer» Correct Answer - C Bond angle of `H_2O` is `104-5^(@)` and dipole moment is 1.84

Discussion

705.	The bond angle and dipole moment of water respectively are `:`A. `109.5^(@),1.84D`B. `107.5^(@),1.56D`C. `104.5^(@),1.84D`D. `102.5^(@),1.56D`
Answer» Correct Answer - C Bond angle of `H_(2)O` is `104.5^(@)` due to lp-lp repulsion.

Discussion

706.	Which of the following has a regular geometryA. `CHCl_(3)`B. `PCl_(3)`C. `XeF_(6)`D. `SF_(4)`
Answer» Correct Answer - A `CHCl_(3) to ` Tetrahedral `PCl_(3) to ` Pyramidal `XeF_(6) to `Distorted octahedral `SF_(4) to `Distorted trigonal bipyramidal

Discussion

707.	Correct order of Bond angle isA. `NH_(3) gt PCl_(3) gt BCl_(3)`B. `BCl_(3) gt NH_(3) gt PCl_(3)`C. `BCl_(3) gt PCl_(3) gt NH_(3)`D. `PCl_(3) gt BCl_(3) gt NH_(3)`
Answer» Correct Answer - B `BCl_(3)` is trigonal in shape where bond angle is `120^(@)`. In `NH_(3)` and `PCl_3` (both are having tetrahedral geometry) through the central atom has equal no. of lone pairs and bond pairs, the valence shell of P is relatively bigger and bond angle is lower.

Discussion

708.	Which bond is most polar?A. Cl-FB. Br-FC. I-FD. F-F
Answer» Correct Answer - C More is the electronegativity difference, more is polarity. `{:(,"Electronegativity difference"),(Cl-F,4.0-3.0=1.0),(Br-F,4.0-2.8=1.2),(I-F,4.0-2.4=1.6),(F-F,4.0-4.0=0.0) :}`

Discussion

709.	Which of the following possesses highest melting point ?A. chlorobenzeneB. o-dichlorobenzeneC. m-dichlorobenzeneD. p-dichlorobenzene
Answer» Correct Answer - D p-dichloro benezene have highest mp.

Discussion

710.	Which of the following is least ionicA. `C_(2)H_(5)Cl`B. KClC. `BaCl_(2)`D. `C_(6)H_(5)N^(+)H_(3)Cl^(-)`
Answer» Correct Answer - A Ethyl chloride is an organic compound so it will be covalent

Discussion

711.	Which one is the strogest bondA. Bi-FB. F-FC. Cl-FD. Br-Cl
Answer» Correct Answer - A Generally Br-F contain maximum eletronegativity difference compare to other compound.

Discussion

712.	Highest melting point would be ofA. HeB. CsClC. `NH_(3)`D. `CHCl_(3)`
Answer» Correct Answer - B CsCl has ionic bonding.

Discussion

713.	Which of the following is electron deficient molecule ?A. `B_2 H_6`B. `C_2H_6`C. `PH_3`D. `SiH_4`
Answer» Correct Answer - A Out of the given four choice `B_2H_6` is an electron deficient molecule.

Discussion

714.	Sodium chloride is an ionic compound whereas hydrogen chloride is a gas becauseA. sodium is reactiveB. covalent bond is weaker than ionic bondC. hydrogen chloride is a gasD. covalent bond is stronger than ionic bond
Answer» Correct Answer - B

Discussion

715.	In which of the following set do all the three compunds have bonds that are mainly ionic:-A. `NaCl,NCl_(3),C Cl_(4)`B. `CsBr,BaBr_(2),SrO`C. `CsF,BF_(3),NH_(3)`D. `Al_(2)O_(3),CaO,SO_(2)`
Answer» Correct Answer - B

Discussion

716.	Which one is most ionic ?A. Cs-ClB. Al-ClC. C-ClD. H-Cl
Answer» Correct Answer - A Cs is more electropositive

Discussion

717.	What is the effect of more electronegative atoms on the strength of an ionic bond ?A. DecreasesB. IncreasesC. Decreases slowlyD. Remains the same
Answer» Correct Answer - B As soon as the electronegativity increases, ionic bond strength increases.

Discussion

718.	A compound is formed by the substitution of two chlorine atoms for two hydrogen atoms in propane. Write the structures of the isomers possible. Give the IUPAC name of the isomer which can exhibit enantiomerism.A. H-ClB. Cl-ClC. Na-ClD. C-Cl
Answer» Correct Answer - C M-X bond is a strongest bond so between Na-Cl is a strongest bond.

Discussion

719.	The increassing order of bond order of `O_(2),O_(2)^(+),O_(2)^(-)`and O_(2)^(--)` is :A. `O_(2)^(-),O_(2)^(-),O_(2)^(+),O_(2)`B. `O_(2)^(+),O_(2),O_(2)^(-),O_(2)^(--)`C. `O_(2),O_(2)^(+),O_(2)^(-),O_(2)^(--)`D. `O_(2)^(--),O_(2)^(-),O_(2),O_(2)^(+)`
Answer» Correct Answer - D Molecular orbitals electronic configuration of `O_(2)` is `(sigma1s)^(2)(sigma^()1s)^(2)(simga2s)^(2)(sigma^()2s)^(2)(sigma2p_(z))^(2)(pi2p_(x))^(2)(pi 2p_(y))^(2)(pi 2p_(y))^(2)(pi^()2p_(x))^(1)(pi^()2p_(y))^(1)` `:. B.O. ` of `O_(2)=1/2 (10-6)=2` Molecular orbitals electronic configuration of `O_(2)^(+)` is `(sigma1s)^(2)(sigma^()1s)^(2)(sigma2s)^(2)(sigma^()2s)^(2)(sigma2p_(z))^(2)(pi 2p_(x))^(2)(pi 2p_(y))^(2)(pi^()2p_(x))^(1)` `:. B.O. ` of `O_(2)^(+) =1/2 (10-5) =2.5` Molecular orbitals electronic configuration of `O_(2)^(-)` is `(sigma1s)^(2)(sigma^()2s)^(2)(sigma^()2s)^(2)(sigma2p_(z))^(2)(pi 2p_(x))^(2)(pi2p_(y))^(2)(pi^()2p_(x))^(2)(pi^()2p_(x))^(2)(pi^()2p_(y))^(1)` `:. B.O.` of `O_(2)^(-)=1/2 (10-7) =1.5` molecular orbitals electronic configuration of `O_(2)^(2-)` is `(sigma1s)^(2)(sigma^()1s)^(2)(sigma2s)^(2)(sigma^()2s)^(2)(sigma2p_(z))^(2)(pi 2p_(x))^(2)(pi2p_(y))^(2)(pi^()2p_(x))^(2)(pi^()2p_(y))^(2)` `:. B.O.` of `O_(2)^(2-) =1/2(10-8)=1.0` `:.` increasing order of B.O. is `O_(2)^(2-) gt O_(2)^(-) gt O_(2) gt O_(2)^(+)`

Discussion

720.	What will be the bond order of the species with electronic configuration `1s^(2) 2s^(2) 2p^(5)`?A. OneB. TwoC. ThreeD. Zero
Answer» Correct Answer - A Electronic configuration of atom ` : 1s^(2) 2s^(2) 2p^(5) ` M.O. configuration: `(sigma 1s^(2))(sigma^()1s^(2))(sigma2s^(2)) (sigma^()2s^(2))(sigma2p_(z)^(2))(pi 2p_(x)^(2) = pi 2p_(y)^(2))(pi^()2p_(x)^(2)=pi^()2p_(y)^(2))` B.O. ` = 1/2 xx (10 - 8) = 1`

Discussion

721.	Which of the following H-bonds is expected to have maximum strength ?A. H-O.. .HB. H-N.. .HC. H-S......HD. All have same strength
Answer» Correct Answer - A The strength of H-bonds is attributed to the electronegativity of the atom bonded to hydrogen. Oxygen atom being more electronegative as compared to N and S, has greater strength of H-bonds.

Discussion

722.	The correct stability order for `N_2` and its given ions is :A. `N_(2) gt N_(2)^(+) = N_(2)^(-) gt N_(2)^(2-)`B. `N_(2)^(+) gt N_(2)^(-) gt N_(2) gt N_(2)^(2-)`C. `N_(2)^(-)gt N_(2)^(+) gt N_(2) gt N_(2)^(2-)`D. `N_(2)^(2-) gt N_(2)^(-) = N_(2)^(+) gt N_(2)`
Answer» Correct Answer - A Bond order of `N_(2) = 3, N_(2)^(+) = 2.5, N_(2)^(-) = 2.5 and N_(2)^(2-)` is 2. Higher the bond order , more is the stability.

Discussion

723.	The correct stability order for `N_2` and its given ions is :A. `N_2 gt N_2^+ gtN_2^-1 gt N_2^(2-)`B. `N_2 lt N_2^+ ltN_2^-1 lt N_2^(2-)`C. `N_2 gt N_2^+ ltN_2 gt N_2^(2)`D. `N_2gt N_2^+ = N2^- gt N_2^(2-)`
Answer» Correct Answer - A M.O. configuration of `N_2 : sigma 1s^2 , sigma^(**) 1s^2` . ` sigma s^2 , sigma2s^2 , [( pi 2 p_y^2) ,(pi2p_z^2)] sigma2p_x^2` The bond order for `N_2 =3` Fro `N_2^+ = 5/2` , For `N_2^- = 5/2` (with one moer antibonding electron than ` N_2^(+)` and 2 presoectivley . Thus Thus bond order is `N_2 gt N_2^+ = N_2^- gt N_2^(2-)` and stability order will be ` N_2 gt gt N_2^+ gt N_2^- gt N_2^(2-)`.

Discussion

724.	How many extreme types of chemical bonds exists in chemical species?A. TwoB. ThreeC. FourD. Five
Answer» Correct Answer - B Ionic bond, covalent bond, and metallic bond are three extreme types. On the other hand, hydrogen bond is just an attractive force.

Discussion

725.	The symbol for resonance isA. `harr`B. `hArr`C. `=`D. `rarr`
Answer» Correct Answer - A We represent ozone molecule by using two Lewis structures: `overset(..)underset(..)O=overset(+)underset(..)O-overset(..)underset(..)O:^(-)harr^(-) :overset(..)underset(..)O-overset(..)underset(+)O=overset(..)underset(..)O` The symbol `harr` indicates that the structures shown are resonance structures.

Discussion

726.	What is the geometry of the molecule with `sp^(3) d^(2)` hybridised contral atom isA. square planarB. Trigonal bipyramidalC. octahedralD. square puramidal
Answer» Correct Answer - C Generally octahedral compound show `sp^(3)d^(2)-` hybridization.

Discussion

727.	`O_(2)^(2-)` is the symbol of ...... IonA. OxideB. SuperoxidwC. PeroxideD. Monoxide
Answer» Correct Answer - C

Discussion

728.	A) C-H bond in ethyne is shorter than C-H bonds in ethene. R) Carbon atom in ethene is sp-hybridised while it is `sp^(2)` in ethyne.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. if both assertion and reason are true but reason is not the correct explanation of the assertionC. if assertion is true but reason is falseD. if the assertion and reason both are false
Answer» Correct Answer - C The correct reason is the carbon atom is `sp^(2)` hybridised in ethene and sp hybridised in ethyne. `H-overset(sp^(2))underset(H)underset(\|)©=overset(sp^(2))underset(H)underset(\|)©-H-H -overset(sp)©-=overset(sp)©-H`

Discussion

729.	Which of the following statement `s` is `(are)` true ?A. ` sp^2 -`hybride orbitals are at `120^@` to one anotherB. `dsp^2 -`Hybride orbitals are directed towards the corners of a regular tetrahedronC. `sp^3 d^3 -` hybrid orbitls are directed towards the corners of a regular octahedronD. `sp^3 d^3 -` hybrid orbitls are directed towards the corners of a regular octahedron
Answer» Correct Answer - A::B::D

Discussion

730.	In which , central atom `s` has have one lone pair of electron ?A. ` Cl_2`B. ` NH_3`C. `PCl_3`D. `XeF_6`
Answer» Correct Answer - A::B::C

Discussion

731.	The valency of carbon in four. On what principle it can be explained in a better wayA. ResonanceB. HybridizationC. Electron transferD. None of the above
Answer» Correct Answer - B Carbon has only two unpaired electrons by its configuration but hybridization is a concept by which we can explain its valency 4.

Discussion

732.	Out of the following hybrid orbitals, the one which forms the bond at angle `120^(@)` , isA. `d^(2)sp^(3)`B. `sp^(3)`C. `sp^(2)`D. `sp`
Answer» Correct Answer - C

Discussion

733.	The structure of `[Cu(H_(2)O)_(4)]^(++)` ion isA. Square planarB. tetrahedralC. Distorted rectangleD. Octahedral
Answer» Correct Answer - A

Discussion

734.	A square planar complex is formed by hybridisation of which atomic orbitals?A. `s,p_(x),p_(y),d_(yz)`B. `s,p_(x),p_(y),d_(x^(2)-y^(2))`C. `s,p_(x),p_y,d_(z^(2))`D. `s,p_(y),p_(z),d_(xy)`
Answer» Correct Answer - B for square planar geometry hybridisation is `dsp^(2)` involving `s,p_(x),p_(y)` and `d_(x^(2)-y^(2))` orbital.

Discussion

735.	As compared to pure atomic orbitals, hybrid orbitals haveA. Low energyB. Same energyC. High energyD. None of these
Answer» Correct Answer - A As compare to pure atomic orbitals, hybrid orbitals have low energy.

Discussion

736.	Using the `VSEPR` theory, identify the type of hybisation and draw the structure of `OF_(2)` What are the oxidation states of `O` and `F` ? .A. LinearB. Square planarC. TetrahedralD. Octahedral
Answer» Correct Answer - C

Discussion

737.	The electronic structure of molecule `OF_(2)` is a hybrid ofA. spB. `sp^(2)`C. `sp^(3)`D. `sd^(3)`
Answer» Correct Answer - C In molecule `OF_(2)` oxygen in `sp^(3)` hybridised.

Discussion

738.	Which of the following has tetrahedral structureA. `CO_(3)^(2-)`B. `NH_(4)^(+)`C. `K_(4)[Fe(CN)_(6)]`D. None of these
Answer» Correct Answer - B Generally `NH_(4)^(+)` shows `sp^(3)` hybridization.

Discussion

739.	In which of the following species the underlined C atom has `sp^3` hybridization?A. `SiF_(4),BeH_(2)`B. `NF_(3),H_(2)O`C. `NF_(3),BF_(3)`D. `H_(2)S,BF_(3)`
Answer» Correct Answer - B Applying VSEPR theory, both `NF_(3)` and `H_(2)O` are `sp^(3)` hybridized.

Discussion

740.	In which of the following molecules the central atom does not have `sp^(3)` hybridization ?A. `CH_(4)`B. `SF_(4)`C. `BF_(4)^(-)`D. `NH_(4)^(+)`
Answer» Correct Answer - B `SF_(4)=sp^(3)d`

Discussion

741.	Some of the properties of the two species, `NO_(3)^(-)` and `H_(3)O^(+)` are described below.Which one of them is correct?A. Dissimilar is hybridization for the central atom with different structuresB. Isostructural with same hybridization for the central atomC. isostructural with different hybridisation for the central atomD. similar in hybridization for the central atom with structures
Answer» Correct Answer - A `NO_(3)^(Theta) =sp^(2)`

Discussion

742.	The correct order of bond strength is :A. `O_(2)^(-) lt O_(2) lt O_(2)^(+) lt O_(2)^(2-)`B. `O_(2)^(2-) lt O_(2)^(-1) lt O_(2) lt O_2^(+)`C. `O_(2)^(-) lt O_(2)^(2-) lt O_(2) lt O_(2)^(+)`D. `O_(2)^(+) lt O_(2) lt O_(2)^(-) lt O_(2)^(2-)`
Answer» Correct Answer - B Bond order for `O_2, O_(2)^(+), O_(2)^(-), O_(2)^(2-)` are ` 2 , 2 . 5, 1 . 5 ` and `1 . 0` respectively . Heigher is bond order more is bond energy .

Discussion

743.	In the case of alkali metals, the covalent character decreases in the order.A. `MF gt MCl gt MB rgt MI`B. `MFgt MCl gt MI gt MBr`C. `MI gt MBr gt MCl gt MF`D. `MCl gt MI gt MBr gt MF`
Answer» Correct Answer - C For a given metal ion `(M^(+))`, the degree of polarization of the negative ion by the positive ion is decided by the polarizability of the negative ion which increases with its size (for a given charge). The greater the polarization, the higher the covalent character is: Size of negative ion `(I^(-)gtBr^(-)gtCl^(-)gtF)` Covalent character `(MIgtMBrgtMClgtMF)`

Discussion

744.	What is the bond order between carbon and nitrogen in `C-= N^(-)` ?
Answer» Since there are 3 bonds between carbon and nitrogen so , the bond order is 3 .

Discussion

745.	Assertion : The experimentally determined carbon to oxygen bond length in carbon dioxide is 115 pm. Reason : The lengths of a normal carbon to oxygen double bond `(C=O)` and carbon to oxygen triple bond `(C-=)` are 121 pm and 110 pm respectively.A. If both assertion and reason are true and reason is the correct explanation of assertion.B. If both assertion and reason are true but reason in not the correct explanation of assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false.
Answer» Correct Answer - B In carbon dioxide, the carbon - oxygen bond lengths lie in between the values for (C = O) and `(C-= O)` bond lengths because carbon dioxide is a resonace hybrid of following structures : `underset(I)( :overset(..)(O) ::C::overset(..)(C): ) harr underset(II)( :underset(..)overset(..^(-))(O: )C vdots vdotsoverset(+)(O): ) harr underset(III)( :overset(+)(O)vdots vdots C :underset(..)overset(..^(-))(O: ))`

Discussion

746.	Which of the following have identical bond order ?A. `CN^-`B. `O_2^-`C. `NO^+`D. `CN^+`
Answer» Correct Answer - A,C Both `CN^-` and `NO^+`have 14 electrons each and as such as isoelectronic. Therefore, also have same bond order.

Discussion

747.	In which of the following molecule, the bond lengths are not equalA. `SiF_4`B. `PF_5`C. `SF_6`D. `CF_4`
Answer» Correct Answer - B In `PF_5` molecule, the bond length in axial plane will become a little longer than the bond length between atoms in equatorial plane

Discussion

748.	The structure of `PF_(5)` molecule is _________.A. tetrahedralB. trigonal bipyramidalC. square planarD. pentagonal bipyramidal
Answer» Correct Answer - B `PF_(5)` involves `sp^(3)d` hybridization and hence has trigonal bipyramidal structure.

Discussion

749.	Which of the following pairs have identical bond order?A. `F_(2) and O_(2)^(2-)`B. `N_(2) and CO_(2)`C. `O_(2) and O_(2)^(-)`D. `N_(2) and N_(2)^(+)`
Answer» Correct Answer - A `F_(2) and O_(2)^(2-)` are isoelectronic . `F_(2) : (sigma1s^(2))(sigma^()1s^(2))(sigma2s^(2))(sigma^()2s^(2))(sigma2p_(z)^(2)) (sigma2p_(z)^(2)=pi2p_(y)^(2))(pi^()2p_(x)^(2) = pi ^()2p_(y)^(2))` B.O.` = 1/2 xx (10 - 8) = 1` `O_(2)^(2-) : (sigma1s^(2))(sigma^()1s^(2))(sigma2s^(2))(sigma^()2s^(2))(sigma2p_(z)^(2))(pi 2p_(x)^(2) = pi 2p_(y)^(2))(pi^()2p_(x)^(2) = pi^()2p_(y)^(2))` B.O. ` = (10-8)/2 = 1`

Discussion

750.	Which of the following bond order is indication of existence of a molecule ?A. Zero bond orderB. Negative bond orderC. Positive bond orderD. All of these.
Answer» Correct Answer - C A molecule exists only if the bond order is positive. If bond order is zero or negative, the molecule does not exist.

Discussion

Explore topic-wise InterviewSolutions in .

This section contains some integer type question Estimate the percent ionic character of the HBr molecule, given that the dipole moment `(mu)` is 0.63 D and HBr bond length 187.5 pm

The correct stability order of the following resonance structure is A. `IgtIIgtIVgtIII`B. `IgtIIIgtIIgtIV`C. `IIgtIgtIIIgtIV`D. `IIIgtIgtIVgtII`

The bond angle and dipole moment of water respectively are `:`A. `105.5^(@)`, 1.84DB. `107.5^(@)`, 1.56 DC. `104.5^@`, 1.84 DD. `102.5^@` , 1.56 D

The bond angle and dipole moment of water respectively are `:`A. `109.5^(@),1.84D`B. `107.5^(@),1.56D`C. `104.5^(@),1.84D`D. `102.5^(@),1.56D`

Which of the following has a regular geometryA. `CHCl_(3)`B. `PCl_(3)`C. `XeF_(6)`D. `SF_(4)`

Correct order of Bond angle isA. `NH_(3) gt PCl_(3) gt BCl_(3)`B. `BCl_(3) gt NH_(3) gt PCl_(3)`C. `BCl_(3) gt PCl_(3) gt NH_(3)`D. `PCl_(3) gt BCl_(3) gt NH_(3)`

Which bond is most polar?A. Cl-FB. Br-FC. I-FD. F-F

Which of the following possesses highest melting point ?A. chlorobenzeneB. o-dichlorobenzeneC. m-dichlorobenzeneD. p-dichlorobenzene

Which of the following is least ionicA. `C_(2)H_(5)Cl`B. KClC. `BaCl_(2)`D. `C_(6)H_(5)N^(+)H_(3)Cl^(-)`

Which one is the strogest bondA. Bi-FB. F-FC. Cl-FD. Br-Cl

Highest melting point would be ofA. HeB. CsClC. `NH_(3)`D. `CHCl_(3)`

Which of the following is electron deficient molecule ?A. `B_2 H_6`B. `C_2H_6`C. `PH_3`D. `SiH_4`

Sodium chloride is an ionic compound whereas hydrogen chloride is a gas becauseA. sodium is reactiveB. covalent bond is weaker than ionic bondC. hydrogen chloride is a gasD. covalent bond is stronger than ionic bond

In which of the following set do all the three compunds have bonds that are mainly ionic:-A. `NaCl,NCl_(3),C Cl_(4)`B. `CsBr,BaBr_(2),SrO`C. `CsF,BF_(3),NH_(3)`D. `Al_(2)O_(3),CaO,SO_(2)`

Which one is most ionic ?A. Cs-ClB. Al-ClC. C-ClD. H-Cl

What is the effect of more electronegative atoms on the strength of an ionic bond ?A. DecreasesB. IncreasesC. Decreases slowlyD. Remains the same

A compound is formed by the substitution of two chlorine atoms for two hydrogen atoms in propane. Write the structures of the isomers possible. Give the IUPAC name of the isomer which can exhibit enantiomerism.A. H-ClB. Cl-ClC. Na-ClD. C-Cl

The increassing order of bond order of `O_(2),O_(2)^(+),O_(2)^(-)`and O_(2)^(--)` is :A. `O_(2)^(-),O_(2)^(-),O_(2)^(+),O_(2)`B. `O_(2)^(+),O_(2),O_(2)^(-),O_(2)^(--)`C. `O_(2),O_(2)^(+),O_(2)^(-),O_(2)^(--)`D. `O_(2)^(--),O_(2)^(-),O_(2),O_(2)^(+)`

What will be the bond order of the species with electronic configuration `1s^(2) 2s^(2) 2p^(5)`?A. OneB. TwoC. ThreeD. Zero

Which of the following H-bonds is expected to have maximum strength ?A. H-O.. .HB. H-N.. .HC. H-S......HD. All have same strength

The correct stability order for `N_2` and its given ions is :A. `N_(2) gt N_(2)^(+) = N_(2)^(-) gt N_(2)^(2-)`B. `N_(2)^(+) gt N_(2)^(-) gt N_(2) gt N_(2)^(2-)`C. `N_(2)^(-)gt N_(2)^(+) gt N_(2) gt N_(2)^(2-)`D. `N_(2)^(2-) gt N_(2)^(-) = N_(2)^(+) gt N_(2)`

The correct stability order for `N_2` and its given ions is :A. `N_2 gt N_2^+ gtN_2^-1 gt N_2^(2-)`B. `N_2 lt N_2^+ ltN_2^-1 lt N_2^(2-)`C. `N_2 gt N_2^+ ltN_2 gt N_2^(2)`D. `N_2gt N_2^+ = N2^- gt N_2^(2-)`

How many extreme types of chemical bonds exists in chemical species?A. TwoB. ThreeC. FourD. Five

The symbol for resonance isA. `harr`B. `hArr`C. `=`D. `rarr`

What is the geometry of the molecule with `sp^(3) d^(2)` hybridised contral atom isA. square planarB. Trigonal bipyramidalC. octahedralD. square puramidal

`O_(2)^(2-)` is the symbol of ...... IonA. OxideB. SuperoxidwC. PeroxideD. Monoxide

In which , central atom `s` has have one lone pair of electron ?A. ` Cl_2`B. ` NH_3`C. `PCl_3`D. `XeF_6`

The valency of carbon in four. On what principle it can be explained in a better wayA. ResonanceB. HybridizationC. Electron transferD. None of the above

Out of the following hybrid orbitals, the one which forms the bond at angle `120^(@)` , isA. `d^(2)sp^(3)`B. `sp^(3)`C. `sp^(2)`D. `sp`

The structure of `[Cu(H_(2)O)_(4)]^(++)` ion isA. Square planarB. tetrahedralC. Distorted rectangleD. Octahedral

A square planar complex is formed by hybridisation of which atomic orbitals?A. `s,p_(x),p_(y),d_(yz)`B. `s,p_(x),p_(y),d_(x^(2)-y^(2))`C. `s,p_(x),p_y,d_(z^(2))`D. `s,p_(y),p_(z),d_(xy)`

As compared to pure atomic orbitals, hybrid orbitals haveA. Low energyB. Same energyC. High energyD. None of these

Using the `VSEPR` theory, identify the type of hybisation and draw the structure of `OF_(2)` What are the oxidation states of `O` and `F` ? .A. LinearB. Square planarC. TetrahedralD. Octahedral

The electronic structure of molecule `OF_(2)` is a hybrid ofA. spB. `sp^(2)`C. `sp^(3)`D. `sd^(3)`

Which of the following has tetrahedral structureA. `CO_(3)^(2-)`B. `NH_(4)^(+)`C. `K_(4)[Fe(CN)_(6)]`D. None of these

In which of the following species the underlined C atom has `sp^3` hybridization?A. `SiF_(4),BeH_(2)`B. `NF_(3),H_(2)O`C. `NF_(3),BF_(3)`D. `H_(2)S,BF_(3)`

In which of the following molecules the central atom does not have `sp^(3)` hybridization ?A. `CH_(4)`B. `SF_(4)`C. `BF_(4)^(-)`D. `NH_(4)^(+)`

The correct order of bond strength is :A. `O_(2)^(-) lt O_(2) lt O_(2)^(+) lt O_(2)^(2-)`B. `O_(2)^(2-) lt O_(2)^(-1) lt O_(2) lt O_2^(+)`C. `O_(2)^(-) lt O_(2)^(2-) lt O_(2) lt O_(2)^(+)`D. `O_(2)^(+) lt O_(2) lt O_(2)^(-) lt O_(2)^(2-)`

In the case of alkali metals, the covalent character decreases in the order.A. `MF gt MCl gt MB rgt MI`B. `MFgt MCl gt MI gt MBr`C. `MI gt MBr gt MCl gt MF`D. `MCl gt MI gt MBr gt MF`

What is the bond order between carbon and nitrogen in `C-= N^(-)` ?

Which of the following have identical bond order ?A. `CN^-`B. `O_2^-`C. `NO^+`D. `CN^+`

In which of the following molecule, the bond lengths are not equalA. `SiF_4`B. `PF_5`C. `SF_6`D. `CF_4`

The structure of `PF_(5)` molecule is _________.A. tetrahedralB. trigonal bipyramidalC. square planarD. pentagonal bipyramidal

Which of the following pairs have identical bond order?A. `F_(2) and O_(2)^(2-)`B. `N_(2) and CO_(2)`C. `O_(2) and O_(2)^(-)`D. `N_(2) and N_(2)^(+)`

Which of the following bond order is indication of existence of a molecule ?A. Zero bond orderB. Negative bond orderC. Positive bond orderD. All of these.