General
✓✗Which one forms the maximum number of hydrogen bonds per molecule?
- H2S
- H2Se
- HF
- H2O
General
✓✗HF exists as (HF)n chains in the liquid because of
- ionic bonding
- metallic bonding
- intermolecular hydrogen bonding
- van der Waals forces only
General
✓✗The π bond in C2H4 is formed by
- overlap of sp3 orbitals
- overlap of s orbitals
- overlap of sp2 hybrid orbitals
- sideways overlap of unhybridised 2pz orbitals of the two carbon atoms
General
✓✗Statement I: All species with an odd number of electrons are paramagnetic.
Statement II: O2 is paramagnetic even though it has an even number of electrons.
Statement II: O2 is paramagnetic even though it has an even number of electrons.
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct
General
✓✗The shape of ICl2+ is
- trigonal planar
- linear
- bent
- T-shaped
General
✓✗The correct order of bond dissociation enthalpy is
- N2+ > N2 > N22+
- N2 > N2+ > N22+
- N22+ > N2+ > N2
- N2 = N2+ = N22+
General
✓✗Statement I: C2 contains a double bond made of two π bonds.
Statement II: C22− has a bond order of 3.
Statement II: C22− has a bond order of 3.
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct
General
✓✗The total number of electrons in the bonding molecular orbitals of N2 (including 1s) is
- 6
- 8
- 14
- 10
General
✓✗In the Lewis structure of N2O written as N=N=O, the formal charges on the terminal N, central N and O are
- 0, 0, 0
- 0, +1, −1
- −1, +1, 0
- +1, −1, 0
General
✓✗Which of the following has the shortest bond length?
- C≡O in CO
- C=O in CO2
- C−O in CO32−
- C−O in CH3OH
General
✓✗The bond enthalpy of the F−F bond is lower than that of Cl−Cl because
- F has no lone pairs
- F has a lower electronegativity
- of strong repulsion between lone pairs on the small F atoms
- F is larger than Cl
General
✓✗The hybridisations of C in CH4, C2H4 and C2H2 have s-characters in the ratio
- 1 : 1.33 : 2
- 3 : 2 : 1
- 1 : 2 : 3
- 2 : 1.33 : 1
General
✓✗Assertion: All C−O bonds in CO32− are equal in length.
Reason: The CO32− ion is a resonance hybrid of three equivalent structures.
Reason: The CO32− ion is a resonance hybrid of three equivalent structures.
- Both Assertion and Reason are true and Reason is the correct explanation of Assertion
- Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- Assertion is true but Reason is false
- Both Assertion and Reason are false
General
✓✗Statement I: Hybrid orbitals form π bonds.
Statement II: Unhybridised p orbitals can form π bonds.
Statement II: Unhybridised p orbitals can form π bonds.
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct
General
✓✗Ionic compounds are generally soluble in water because
- water forms covalent bonds with ions
- water is non-polar
- hydration enthalpy of the ions compensates for the lattice enthalpy
- ionic bonds are weak