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FACT SHEET : Class 11 | Chemistry | Chapter 04 | Chemical Bonding And Molecular Structure

Ruhul Amin Alig

Class 11 | Chemistry | Chapter 04 | Chemical Bonding And Molecular Structure

The enolic form of a acetone contains (a) 9 sigma bonds, 1 pi bond and 2 lone pairs (b) 8 sigma bonds, 2 pi bonds and 2 lone pairs (c) 10 sigma bonds, 1 pi bond and 1 lone pair (d) 9 sigma bonds, 2 pi bonds and 1 lone pair

Ruhul Amin Alig

NEET 2021

BF 3 is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are: (1) sp 3 and 4 (2) sp 3 and 6 (3) sp 2 and 6 (4) sp 2 and 8 [ NEET 2021 ]

Ruhul Amin Alig

Hydrogen Bonding

The boiling point of p-nitrophenol is higher than that of o-nitrophenol because (a) NO2 group at p-position behave in a different way from that at o-position. (b) intramolecular hydrogen bonding exists in p-nitrophenol (c) there is intermolecular hydrogen bonding in p-nitrophenol (d) p-nitrophenol has a higher molecular weight than o-nitrophenol.

Ruhul Amin Alig

Hydrogen Bonding

The vapour pressure of NO2 OH is higher than O2N OH due to (a) dipole moment (b) dipole-dipole interaction (c) H-bonding (d) lattice structure

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Hydrogen Bonding

Which of the following are correctly classified ? Intermolecular Intramolecular H-bonding H-bonding (a) HF H2O (b) CH3OH HF (c) H2O o-nitrophenol (d) HF p-nitrophenol

Ruhul Amin Alig

Hydrogen Bonding

In which of the following state of compound the magnitude of H-bonding will be maximum and in which case it will be minimum ? (a) Maximum = Solid, Minimum = Liquid (b) Maximum = Liquid, Minimum = Gas (c) Maximum = Solid, Minimum = Gas (d) Maximum = Gas, Minimum = Solid

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M.O.T

According to molecular orbital theory which of the following lists rank the nitrogen species in terms of increasing bond order ? 1. N − 2 < N 2 < N 2 − 2 N2- < N2 < N22- 2. N 2 − 2 < N − 2 < N 2 N22- < N2- < N2 3. N 2 < N 2 − 2 < N − 2 N2 < N22- < N2- 4. N − 2 < N 2 − 2 < N 2

Ruhul Amin Alig

M.O.T

Match the columns Column-I Column-II (A) Valence bond theory (p) Nyholm and Gillespie (B) Octet rule (q) F. Hund & R. S Mulliken (C) Molecular orbital (r) Heitler and London theory (D) The valence shell (s) Ko􀀈􀀈ssel and Lewis electron pair repulsion theory (a) A – (p), B – (q),C – (r), D – (s) (b) A – (q), B – (r),C – (s), D – (p) (c) A – (p), B – (s),C – (q), D – (r) (d) A – (s), B – (r), C – (q), D – (p)

Ruhul Amin Alig

M.O.T

Which of the following does not exist on the basis of molecular orbital theory ? (a) H2 + (b) He2 + (c) He2 (d) Li

Ruhul Amin Alig