Chemical Bonding and Molecular Structure — practice questions

138 curated practice questions from Chemical Bonding and Molecular Structure (Chemistry JEE Advanced, NTA Exams) — 89 hard, 49 medium. Every question includes the final answer free; step-by-step worked solutions with a free account.

• Ionic bond is defined as the electrostatics force of attraction holding the oppositely charged ions. Ionic compounds…
• Among the oxides of nitrogen, N 2 O, NO and NO 2 , molecules with unpaired electrons are :
• The number and type of bonds between two carbon atoms in CaC 2 are
• The correct order of increasing s-character (in percentage) in the hybrid orbitals of following molecules/ions is : (I)…
• The species having bond order different from that in CO is (2007)
• The geometry and the type of hybrid orbital present about the central atom in BF 3 is (1998)
• Statement-1: The electronic structure of O 3 is Statement-2: structure is not allowed. because octet around O cannot be…
• Statement-1 : The value of van der Waals constant a is larger for ammonia than for nitrogen. Statement-2 : Hydrogen…
• Carbon tetrachloride has no net dipole moment because of (1983)
• The compound in which uses its sp 3 hybrid orbitals for bond formation is
• In allene (C 3 H 4 ), the type (s) of hybridization of the carbon atoms, is (are) (2012)
• Assertion : HÔF bond angle is higher than HÔCl . Reason : Oxygen is more electronegative than chlorine.
• The maximum possible number of hydrogen bonds, a water molecule can form is
• The ionic bonds X + Y – are formed when : (I) electron affinity of Y is high (II) ionization energy of X is low (III)…
• In compounds of type ECl 3 , where E = B, P, As or Bi, the angles Cl—E—Cl (1999)
• Under hydrolytic conditions, the compounds used for preparation of linear polymer and for chain termination…
• Which one of the following compounds has sp 2 hybridisation?
• The type of hybrid orbitals used by the chlorine atom in ClO _ 2 ^ - is (1992)
• Which of the following compounds have the same no. of lone pairs with their central atom ? (I) XeF _ 5 ^ - (II) BrF 3…
• Assertion : LiCl is predominantly a covalent compound. Reason : Electronegativity difference between Li and Cl is too…
• The shape of MnO _ 4 ^ - ion and the hybridisation of Mn in MnO _ 4 ^ - is :
• Which of the following are isoelectronic and isostructural ? NO _ 3 ^ - , CO _ 3 ^ 2- , ClO _ 3 ^ - , SO _ 3 (2003)
• The space model which is obtained by joining the points representing various bonded atoms gives the shape of the…
• The geometry of H 2 S and its dipole moment are (1999)
• The number of hybrid orbitals used by the chlorine atom is ClO _ 2 ^ - is (1992)
• Which of the following statements are correct about sulphur hexafluoride ?
• In general boiling point of covalent compounds is effected due to increasing molecular weight and hydrogen bonding…
• In general boiling point of covalent compounds is effected due to increasing molecular weight and hydrogen bonding…
• Molecular shapes of SF 4 , CF 4 and XeF 4 are
• The correct order of hybridisation of the central atom in the following species NH 3 ,[PtCl 4 ] 2– , PCl 5 and BCl 3 is
• Which of the following molecular species has unpaired electrons (s) ? (2002)
• Bonds present in N 2 O 5 (nitrogen pentaoxide) are :
• Choose the correct code of characteristics for the given order of hybrid orbitals of same atom, sp 2 3 (i)…
• According to V.B.T., atoms of element form bond only to pair up their unpaired electrons present in ground state or…
• The type of hybrid orbitals used by the chlorine atom in ClO 2 – is
• Assertion : (CH 3 ) 3 N geometry is pyramidal but in case (SiH 3 ) 3 N it is planar. Reason : The maximum covalency of…
• Each of the following options contains a set of four molecules, identify the option(s) where all four molecules possess…
• In an experiment, m grams of a compound X (gas/liquid/solid) taken in a container is loaded in a balance as shown in…
• Assertion : In SO 3 molecule bond dissociation energy of all S = O bonds are not equivalent. Reason : SO 3 molecule is…
• Among the following, the paramagnetic compound is (2007)
• Ionic bond is defined as the electrostatics force of attraction holding the oppositely charged ions. Ionic compounds…
• Assertion : The HF _ 2 ^ - ion exists in the solid state & also in liquid state but not in aqueous state. Reason : The…
• Statement-1 : Boron always forms covalent bond. Statement-2 : The small size of B 3+ favours formation of covalent bond.
• The geometry with respect to the central atom of the following molecules are : N (SiH 3 ) 3 ; Me 3 N ; (SiH 3 ) 3 P
• The species having bond order different from that in CO is
• According to V.B.T., atoms of element form bond only to pair up their unpaired electrons present in ground state or…
• The bond between two identical non-metal atoms has a pair of electrons (1986)
• Molecular shapes of SF 4 , CF 4 and XeF 4 are (2000)
• The bond angle of NH 3 , NH _ 4 ^ + and NH _ 2 ^ - are in the order :
• The correct sequence of polarity of the following molecule (1) Benzene (2) Inorganic Benzene (3) PCl 3 F 2 (4) PCl 2 F…
• Which of the following molecules will have polar bonds but zero dipole moment ?
• The common features among the species CN – , CO and NO + are (2001)
• Which species has the maximum number of lone pair of electrons on the central atom?
• Of the following compounds, which will have a zero dipole moment ? (1987)
• In an experiment, m grams of a compound X (gas/liquid/solid) taken in a container is loaded in a balance as shown in…
• Among KO 2 , AlO 2 – , BaO 2 and NO 2 + unpaired electron is present in
• Assuming 2 s -2 p mixing is not operative, the paramagnetic species among the following is
• Which of the following have identical bond order ? (1992)
• Among the following the molecular with the highest dipole moment is
• The number and type of bonds between two carbon atoms in CaC 2 are (1996)
• Carbon tetrachloride has no net dipole moment because of
• For diatomic molecules, the correct statement(s) about the molecular orbitals formed by the overlap of two 2p z…
• The hyperconjugative stabilities of tert-butyl cation and 2-butene, respectively, are due to (2005)
• The space model which is obtained by joining the points representing various bonded atoms gives the shape of the…
• The species in which the central atom uses sp 2 hybrid orbitals in its bonding is
• The correct molecular orbital diagram for F 2 molecule in the ground state is
• Each of the following options contains a set of four molecules. Identify the option(s) where all four molecules…
• The hybridisation of atomic orbitals of nitrogen in NO 2 + , NO 3 – and NH 4 + are
• The total number of electrons that take part in forming the bond in N 2 is
• Among the following species, identify the isostructural pairs. (1996) NF 3 , N _ 3 ^ - , BF 3 , H 3 O + , HN 3
• Among KO 2 , AlO _ 2 ^ - , BaO _ 2 and NO _ 2 ^ + , unpaired electron is present in (1997)
• The correct molecular orbital diagram for F 2 molecule in the ground state is (2023)
• The hybridisation of atomic orbitals of nitrogen in NO _ 2 ^ + , NO _ 3 ^ - and NH _ 4 ^ + are (2000)
• What is the state of hybridisation of Xe in cationic part of solid XeF 6 ?
• According to molecular orbital theory which of the following statement about the magnetic character and bond order is…
• If N B is the number of bonding electrons and N A is the number of antibonding electrons of a molecule. Then choose the…
• The correct increasing order of adjacent bond angle among BF 3 , PF 3 and ClF 3 :
• Assuming pure 2s and 2p orbitals of carbon are used in forming CH 4 molecule, which of the following statement is false…
• Which is correct statements ? As the s-character of a hybrid orbital decreases (I) The bond angle decreases (II) The…
• [ X ] + H 2 SO 4 → [ Y ] a colourless gas with irritating smell, [ Y ] + K 2 Cr 2 O 7 + H 2 SO 4 → green solution. [ X…
• Among the following, the molecule with highest dipole moment is :
• The correct order of hybridisation of the central atom in the following species NH 3 , [PtCl 4 ] 2– , PCl 5 and BCl 3 is
• Number of paired electrons in O 2 molecule is : (1995)
• Amongst H 2 O, H 2 S, H 2 Se and H 2 Te, the one with the highest boiling point is (2000)
• The bond between two identical non-metal atoms has a pair of electrons
• Hydrogen bonding plays a central role in the following phenomena
• Which of the following molecular species has unpaired electron(s)?
• Ionic bond is defined as the electrostatics force of attraction holding the oppositely charged ions. Ionic compounds…
• The state of hybridisation of central atom in dimer of BH 3 and BeH 2 is :
• Statement-1: LiCl is predominantly a covalent compound. Statement-2: Electronegativity difference between Li and Cl is…
• The dipole moment of o, p and m-dichlorobenzene will be in the order :
• The space model which is obtained by joining the points representing various bonded atoms gives the shape of the…
• Assuming 2s-2p mixing is NOT operative, the paramagnetic species among the following is (2014)
• Amongst H 2 O, H 2 S, H 2 Se and H 2 Te, the one with the highest boiling point is
• The compoun(s) with TWO lone pairs of electrons on the central atom is (are )
• Specify the coordination geometry around and hybridisation of N and B atoms in a 1 : 1 complex of BF 3 and NH 3
• Assuming that Hund’s rule is violated, the bond order and magnetic nature of the diatomic molecule B 2 is (2010)
• The nodal plane in the π-bond of ethene is located in (2002)
• The common features among the species CN – , CO and NO + are
• Among the following, the molecule that is linear, is
• The correct order of increasing C — O bond length of CO, CO 3 2– , CO 2 is
• Element X is strongly electropositive and element Y is strongly electronegative. Both are univalent. The compound…
• The H – C – H bond angle in CH 4 is 109.5º, due to lone pair repulsion, the H – O – H angle in H 2 O will :
• The option(s ) in which at least three molecules follow Octet Rule is(are ) (2024)
• Among the following compounds the one that is polar and has the central atom with sp 2 hybridisation is
• On hybridization of one s and one p orbital we get
• Name of the structure of silicates in which three oxygen atoms of [SiO 4 ] 4– are shared is
• The species in which the central atom uses sp 2 hybrid orbitals in its bonding is (1988)
• Which molecular geometry is least likely to result from a trigonal bipyramidal electron geometry ?
• Number of paired electrons in O 2 molecule is
• Assuming that Hund’s rule is violated, the bond order and magnetic nature of the diatomic molecule B 2 is
• Pick out the isoelectronic structures from the following; (1993) I. H _ 3 ^ + II. H 3 O + III. NH 3 IV. H _ 3 ^ -
• With respect to graphite and diamond, which of the statement(s) given is(are) correct?
• Statement-1 : Between SiCl 4 and CCl 4 only SiCl 4 reacts with water. Statement-2 : SiCl 4 is ionic and CCl 4 is…
• If a molecule MX 3 has zero dipole moment, the sigma bonding orbitals used by M (atomic number < 21) are
• Which species has the maximum number of lone pair of electrons on the central atom ? (2005)
• The correct order of increasing C – O bond length of CO, array l O _ 3 ^ 2- , O 2, array is (1999)
• Statement-1 : p -Hydroxybenzoic acid has a lower boiling point than o -hydroxybenzoic acid. Statement-2 : o…
• The Cl—C—Cl angle in 1, 1, 2, 2-tetrachloroethene and tetrachloromethane respectively will be about (1988)
• The maximum possible number of hydrogen bonds a water molecule can form is (1992)
• Which one among the following does not have the hydrogen bond ? (1983)
• Specify the coordination geometry around and hybridisation of N and B atoms in a 1 : 1 complex of BF 3 and NH 3 (2002)
• Given the correct order of initials T or F for following statements. Use T is statement is true and F if it is false …
• Which of the following compounds has dipole moment approximately equal to that of chlorobenzene ?
• The shape of XeO 2 F 2 molecule is
• Assertion : Water is a good solvent for ionic compounds but poor for covalent compounds. Reason : Hydration energy of…
• In general boiling point of covalent compounds is effected due to increasing molecular weight and hydrogen bonding…
• A tin chloride ‘ Q ’ undergoes the following reactions (not balanced) Q + Cl – → X, Q + Me 3 N → Y, Q + CuCl 2 → Z +…
• Among the following species, identify the isostructural pairs NF _ 3 , NO _ 3 ^ - , BF _ 3 , H _ 3 O ^ + , HN _ 3
• In the compound CH 2 = CH—CH 2 —CH 2 —C CH, the C 2 — C 3 bonds is of
• Element X is strongly electropositive and element Y is strongly electronegative. Both are univalent. The compound…
• Which one of the following compounds has sp 2 -hybridisation ?
• The types of bonds present in CuSO 4 ·5H 2 O are only
• The compound in which * C uses its sp 3 hybrid orbitals for bond formation is : (1989)
• The geometry of H 2 S and its dipole moment are
• How many structures of F are possible?
• According to V.B.T., atoms of element form bond only to pair up their unpaired electrons present in ground state or…
• Arrange the following compounds in order of increasing dipole moment, toluene (I), m-dichlorobenzene (II)…

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