Sum of bond order of CO and NO⁺ is ____.

The number of non-polar molecules from the following is: HF, H₂O, SO₂, H₂, CO₂, CH₄, NH₃, HCl, CHCl₃, BF₃

The number of species from the following which are paramagnetic and with bond order equal to one is: H₂, He₂⁺, O₂⁺, N₂^2-, O₂^2-, F₂, Ne₂⁺, B₂

Number of compounds with one lone pair of electrons on central atom amongst following is: O₃, H₂O, SF₄, ClF₃, NH₃, BrF₅, XeF₄

The total number of anti bonding molecular orbitals, formed from 2s and 2p atomic orbitals in a diatomic molecule is ____.

The total number of molecules with zero dipole moment among CH₄, BF₃, H₂O, HF, NH₃, CO₂ and SO₂ is ____.

Match List-I with List-II.
List-I (Molecule): A. BrF₅, B. H₂O, C. ClF₃, D. SF₄.
List-II (Shape): I. T-shape, II. See saw, III. Bent, IV. Square pyramidal.
Choose the correct answer.

Aluminium chloride in acidified aqueous solution forms an ion having geometry:

The molecule/ion with square pyramidal shape is:

Statement I: NF₃ has a greater net dipole moment than NH₃ because fluorine is more electronegative than nitrogen. Statement II: In NH₃ the lone-pair orbital dipole opposes the NH bond dipoles, while in NF₃ they act in the same direction. Choose the most appropriate answer.

The total number of molecular orbitals formed from 2s and 2p atomic orbitals of a diatomic molecule is ____.

The number of species from the following in which the central atom uses sp³ hybrid orbitals in its bonding is ______: NH₃, SO₂, SiO₂, BeCl₂, CO₂, H₂O, CH₄, BF₃

The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals:
A. Have the same energy.
B. Have the minimum overlap.
C. Have same symmetry about the molecular axis.
D. Have different symmetry about the molecular axis.
Choose the most appropriate answer.

Which of the following is least ionic?

The number of molecules/ion/s having trigonal bipyramidal shape is: PF₅, BrF₅, PCl₅, [PtCl₄]^2-, BF₃, Fe(CO)₅

Arrange the bonds in order of increasing ionic character in the molecules: LiF, K₂O, N₂, SO₂ and ClF₃.

In case of isoelectronic species the size of F^-, Ne and Na⁺ is affected by:

Select the compound from the following that will show intramolecular hydrogen bonding.

Statement I: A π bonding MO has lower electron density above and below the inter-nuclear axis. Statement II: The π* antibonding MO has a node between the nuclei. Choose the most appropriate answer.

The total number of species from the following in which one unpaired electron is present, is: N₂, O₂, C₂^-, O₂^-, O₂^2-, H₂⁺, CN^-, He₂⁺

In which one of the following pairs the central atoms exhibit sp² hybridization?

In the lewis dot structure for NO₂^-, total number of valence electrons around nitrogen is ____.

Match List-I with List-II.
List-I (Compound / Species): A. SF₄, B. BrF₃, C. BrO₃^-, D. NH₄⁺.
List-II (Shape / Geometry): I. Tetrahedral, II. Pyramidal, III. See saw, IV. Bent T-shape.
Choose the correct answer.

Match List-I with List-II.
List-I (Hybridization): A. sp³, B. dsp², C. sp³d, D. sp³d².
List-II (Orientation in Space): I. Trigonal bipyramidal, II. Octahedral, III. Tetrahedral, IV. Square planar.
Choose the correct answer.

Match List-I with List-II.
List-I (Molecule / Species): A. SO₂Cl₂, B. NO, C. NO₂^-, D. I₃^-.
List-II (Property / Shape): I. Paramagnetic, II. Diamagnetic, III. Tetrahedral, IV. Linear.
Choose the correct answer.

Number of molecules from the following which are exceptions to octet rule is: CO₂, NO₂, H₂SO₄, BF₃, CH₄, SiF₄, ClO₂, PCl₅, BeF₂, C₂H₆, CHCl₃, CBr₄

Match List-I with List-II.
List-I (Molecule): A. NH₃, B. BrF₅, C. PCl₅, D. CH₄.
List-II (Shape): I. Square pyramid, II. Tetrahedral, III. Trigonal pyramidal, IV. Trigonal bipyramidal.
Choose the correct answer.

Number of molecules/species from the following having one unpaired electron is: O₂, O₂^-, NO, CN^-, O₂^2-

Number of molecules/ions from the following in which the central atom is involved in sp³ hybridization is: NO₃^-, BCl₃, ClO₂^-, ClO₃

The number of molecules/ions that show linear geometry among the following is: XeF₂, I₃^-, C₃O₂, I₃⁺, CO₂, SO₂, BeCl₂, and O₃.

Arrange the following compounds in increasing order of their dipole moment: HBr, H₂S, NF₃ and CHCl₃.

Match List-I with List-II.
List-I (Classification of molecules based on octet rule): A. Molecules obeying octet rule, B. Molecules with incomplete octet, C. Molecules with incomplete octet with odd electron, D. Molecules with expanded octet.
List-II (Example): I. NO, NO₂, II. BCl₃, AlCl₃, III. H₂SO₄, PCl₅, IV. CCl₄, CO₂.
Choose the correct answer.

Which of the following linear combination of atomic orbitals will lead to formation of molecular orbitals in homonuclear diatomic molecules [internuclear axis in z-direction]?
Combinations: A. 2p_z+2p_x, B. 2s+2p_x, C. 3d_xy+3d_x²−y², D. 2s+2p_z, E. 2p_z+3d_x²−y².

Which of the following statement is true with respect to H₂O, NH₃ and CH₄?
Statements: A. All bent with nonzero dipole. B. Angles CH₄ > NH₃ > H₂O. C. Lone pairs H₂O 2, NH₃ 1, CH₄ 0. D. H₂O and NH₃ Lewis bases, CH₄ neither. E. NH₃ acid, H₂O base in water.

Statement I: O-O bond lengths in O₃ are all equal, longer than a double bond but shorter than a single bond. Statement II: Strong lone pair-lone pair repulsion between oxygen atoms is solely responsible for this bond-length pattern. Choose the most appropriate answer.

Let n be the number of lone pairs in equatorial positions in the most stable structure of ClF₃. Which of the following ions have n unpaired electrons?
A. V³⁺, B. Ti³⁺, C. Cu²⁺, D. Ni²⁺, E. Ti²⁺.

The molecules having square pyramidal geometry are:

Total number of non bonded electrons present in NO₂^- ion based on Lewis theory is ____.

Among SO₂, NF₃, NH₃, XeF₂, ClF₃ and SF₄, the hybridization of the molecule with nonzero dipole moment and highest number of lone-pairs of electrons on the central atom is:

A molecule AX₄Y has all elements from the p-block. Element A is the rarest, monoatomic, non-radioactive element of its group with the lowest ionization enthalpy among A, X and Y. Elements X and Y have the first and second highest electronegativity values. What is the shape of the molecule?

In 3,3-dimethylhex-1-en-4-yne, there are ____ sp³, ____ sp² and ____ sp hybridised carbon atoms respectively.

Which among the following molecules is (a) involved in sp³d hybridization, (b) has different bond lengths and (c) has lone pair of electrons on the central atom?

Which of the following molecule(s) show/s paramagnetic behavior?
A. O₂, B. N₂, C. F₂, D. S₂, E. Cl₂.
Choose the correct answer.

For ClF₃, three structures (I, II, III) are drawn as diagrams. Statement II says structure III is most stable because the lone-pair orbitals are axial, where lp-bp repulsion is minimum. Choose the most appropriate answer.

Match List-I with List-II.
List-I (Molecule/ion): A. ICl₂^-, B. H₂O, C. SO₂, D. XeF₄.
List-II (Bond pair : lone pair on central atom): I. 4 : 2, II. 4 : 1, III. 2 : 3, IV. 2 : 2.
Choose the correct answer.

In SO₂, NO₂^- and N₃^- the hybridizations at the central atom are respectively:

The correct increasing order of C − H (A), C − O (B), C = O (C) and C ≡ N (D) bonds in terms of covalent bond length is:

Statement I: The correct order in terms of bond dissociation enthalpy is Cl₂ > Br₂ > F₂ > I₂. Statement II: The correct trend in the covalent character of the halides is AlF₃ > AlCl₃ > AlBr₃ > AlI₃. Choose the correct answer.

Among H₂S, H₂O, NF₃, NH₃ and CHCl₃, identify the molecule (X) with lowest dipole moment value. The number of lone pairs of electrons present on the central atom of the molecule (X) is ____.

Identify the molecule (X) with maximum number of lone pairs of electrons (obtained using Lewis dot structure) among HNO₃, H₂SO₄, NF₃ and O₃. Choose the correct bond angle made by the central atom of the molecule (X).

Among the following the correct combinations are:
A. IF₃ → T-shaped (sp³d).
B. IF₅ → Square pyramidal (sp³d²).
C. IF₇ → Pentagonal bipyramidal (sp³d³).
D. ClO₄^- → Square planar (sp²d).
Choose the correct answer.

Identify the correct statements:
A. The dipole moment value of NF₃ is higher than that of NH₃.
B. The dipole moment value of BF₃ is zero.
C. The molecule containing sp³d² hybridisation has trigonal bipyramidal structure.
D. The formal charge on nitrogen atom in N₃^- is -1.
E. The molecule has only one lone pair on the central atom is IF₃.
Choose the correct answer.

Pair of species among the following having same bond order as well as paramagnetic character will be:

Statement I: The number of species among BF₄^-, SiF₄, XeF₄ and SF₄ that have unequal E-F bond lengths is two. Statement II: Among O₂^-, O₂^2-, F₂ and O₂⁺, O₂^- has the highest bond order. Choose the correct answer.

Match List-I with List-II according to shape.
List-I: A. XeO₃, B. XeF₂, C. XeO₂F₂, D. XeOF₄.
List-II: I. BrF₅, II. NH₃, III. [I₃]^-, IV. SF₄.
Choose the correct answer.

Statement I: The correct sequence of bond lengths is O₂⁺ < O₂ < O₂^- < O₂^2-. Statement II: The correct sequence of number of unpaired electrons is O₂ > O₂⁺ > O₂^- > O₂^2-. Choose the correct answer.

SF₄ is isostructural with:
A. BrF₄^-, B. CH₄, C. IF₄⁺, D. XeF₄, E. XeO₂F₂.
Choose the correct answer.

According to Lewis theory, the total number of σ bond-pairs and lone pair of electrons around the central atom of XeO₆^4- ion is ____.

Which of the following pictorial diagram most correctly represents the π* (π antibonding) molecular orbital between two atoms if the internuclear axis is taken to be in the z-direction? Options below describe the diagrams in words.

Consider the following species: BrF₅, XeF₅^-, BF₄^-, ICl₄^-, XeF₄, SF₄, NH₄⁺, ClF₃, XeF₂, ICl₂^-. Number of species having sp³d hybridized central atom is ____.

Statement I: Aluminium upon reaction with NaOH forms [Al(OH)₆]^3- ion. Statement II: The geometry of ICl₄^-, ClO₃^- and IBr₂^- is square planar, pyramidal and linear respectively. Choose the correct answer.

The pairs among A = [SO₃^2-, CO₃^2-], B = [O₂^2-, F₂], C = [CN^-, CO], D = [NH₃, H₃O⁺] and E = [MnO₄^2-, CrO₄^2-] that do not have similar Lewis dot structure are:

Statement I: F₂O > H₂O > Cl₂O is the correct trend in terms of bond angle. Statement II: SiF₄, SnF₄ and PbF₄ are isostructural. Choose the correct answer.

Statement I: The number of compounds among SO₂, SO₃, SF₄, SF₆ and H₂S in which sulphur does not obey the octet rule is 3. Statement II: Among the sets [H₂O, ClF₃, SF₄], [NH₃, BrF₅, SF₄], [BrF₅, ClF₃, XeF₄] and [XeF₄, ClF₃, H₂O], the number of sets in which all the molecules have one lone pair of electrons on the central atom is 1. Choose the correct answer.

Bromine trifluoride autoionizes to form BrF₂⁺ and BrF₄^-. The shapes of the cation and anion are respectively ____ and ____.