Chemical Bonding and Molecular Structure

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

1. bent, square planar
2. linear, square planar
3. bent, see-saw
4. linear, tetrahedral

The pairs among A = [SO32-, CO32-], B = [O22-, F2], C = [CN-, CO], D = [NH3, H3O+] and E = [MnO42-, CrO42-] that do not have similar Lewis dot structure are

1. A, B and E
2. A and E
3. B, C and D
4. C and D

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true

The covalent radii of atoms A and B are rA and rB, respectively. The covalent bond length and total length of AB molecule are respectively

1. (rA + rB), 2(rA + rB)
2. 12(rA + rB), (rA + rB)
3. (rA + rB), (rA + rB)
4. 2(rA + rB), 12(rA + rB)

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

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true

SF4 is isostructural with : Choose the correct answer from the options given below :

1. C Only
2. C and E Only
3. A and D Only
4. B and E Only

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below

1. Both Statement I and Statement II are false
2. Statement I is true but Statement II is false
3. Statement I is false but Statement II is true
4. Both Statement I and Statement II are true

Given below are statements about some molecules/ions. Identify the CORRECT statements. Choose the correct answer from the options given below:

1. B & C Only
2. B, C & D Only
3. A, C & D Only
4. A, B, C, D & E

Among the following, the CORRECT combinations are Choose the correct answer from the options given below:

1. B, C and D Only
2. A, B, C and D
3. A, B and C Only
4. A and B Only

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

1. O2-, N2+
2. O2+, N22-
3. O2-, N2-
4. O2+, N2-

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).

1. 107
2. 102
3. 120
4. 116

Which statements are NOT TRUE about XeO2F2? Choose the correct answer from the options given below :

1. B, D and E Only
2. B and D Only
3. B, C and E Only
4. A and D Only

Two p-block elements X and Y form fluorides of the type EF3. The fluoride compound XF3 is a Lewis acid and YF3 is a Lewis base. The hybridizations of the central atoms of XF3 and YF3 respectively are

1. sp2 and sp3
2. Both sp3
3. Both sp2
4. sp3 and sp2

The formal charges on the atoms marked as (1) to (4) in the Lewis representation of HNO3 molecule respectively are [figure]

1. 0, 0, -1, +1
2. 0, -1, 0, +1
3. 0, +1, 0, -1
4. +1, 0, 0, -1

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 :

1. 3
2. 2
3. 0
4. 1

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below:

1. Both Statement I and Statement II are true
2. Statement I is true but Statement II is false
3. Statement I is false but Statement II is true
4. Both Statement I and Statement II are false

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 :

1. D < C < B < A
2. D < C < A < B
3. A < B < C < D
4. A < D < C < B

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

1. sp2, sp2 and sp2
2. sp, sp2 and sp
3. sp2, sp and sp
4. sp2, sp2 and sp

Which of the following molecule(s) show/s paramagnetic behavior? Choose the correct answer from the options given below:

1. A & C only
2. A & E Only
3. A & D Only
4. B Only

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:

1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below

1. Both Statement I and Statement II are false
2. Both Statement I and Statement II are true
3. Statement I is false but Statement II is true
4. Statement I is true but Statement II is false

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

1. Pentagonal planar
2. Square pyramidal
3. Trigonal bipyramidal
4. Octahedral

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

1. sp3
2. dsp2
3. sp3d2
4. sp3d

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?

1. XeF4
2. XeF2
3. PF5
4. SF4

An element 'E' has the ionisation enthalpy value of 374 kJ mol-1. 'E' reacts with elements A, B, C and D with electron gain enthalpy values of −328, −349, −325 and −295 kJ mol-1, respectively. The correct order of the products EA, EB, EC and ED in terms of ionic character is :

1. EB > EA > EC > ED
2. EA > EB > EC > ED
3. ED > EC > EA > EB
4. ED > EC > EB > EA

The molecules having square pyramidal geometry are

1. BrF5 & PCl5
2. SbF5 & PCl5
3. BrF5 & XeOF4
4. SbF5 & XeOF4

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] ? Choose the correct answer from the options given below:

1. D Only
2. E Only
3. C and D Only
4. A and B Only

Which of the following statement is true with respect to H2O, NH3 and CH4 ? Choose the correct answer from the options given below:

1. A, D and E Only
2. C, D and E Only
3. A, B and C Only
4. A, B, C and E Only