Please help me solve these multiple choice questions Question 1) Choices: 1, 2,

Question

Please help me solve these multiple choice questions

Question 1) Choices: 1, 2, 3, 4, 5, 6.
How many resonance forms are there for the best Lewis structure ofthe acetate ion (CH3CO2)?

Question 2) The N-O bonds in nitromethane(CH3NO2):
Choices: True, False.
A. are different in length
B. are of equal length
C. are of different strength
D. are the same strength

Question 3) For each of the following substances, choose theintermolecular force(s) which are most important in determining itsnormal physical properties.
Choices: Covalent bonding, Dipole-dipole interaction andLondon forces, Hydrogen bond and dipole-dipole interaction,Gravitational force, Ionic bonding, London forces.
A. hydrogen iodide (HI)
B. bromine monochloride (BrCl)
C. hydrogen (H2)
D. hydrogen fluoride (HF)

Explanation / Answer

WE Know that :     1 )           Acetate ion has two resonance forms.      2 )            The N-O bonds in Nitromethane are same in length areof  same in strengths.      3 )              A) HI -- Covalent bonding               B ) BrCl -- Covalent bonding , Dipole-dipoleinteraction and London forces                C) H2   -- Covalent bonding                 D) HF - -   Hydrogen bond anddipole-dipole interaction.

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