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CHEMICAL BONDING AND MOLECULAR STRUCTURE- quiz 1

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JEE Advanced is a high level exam that checks your concept by putting various types of questions. The questions are in a different format from JEE mains.m, herein the questions are : single correct multiple choice questions, multiple correct multiple choice questions, statement based questions and comprehension type questions.

Q1. Which represents metallic character in an element?:
  •  
  •  
  •  
  •  None of these
Solution
(a) Partially filled bonds or overlapping bonds represent metal

Q2.The enolic form of acetone contain:
  •  10 σ bonds, 1 Ï€ bond and 1 lone pair
  •  8 σ bonds, 2 Ï€ bonds and 2 lone pairs
  •  9 σ bonds, 1 Ï€ bonds and 2 lone pairs
  •  Isoelectronic and weak field ligands
Solution


Q3.  The common features among the species CN^-,CO and NO^+ are:
  •   Bond order three and isoelectronic
  •  Bond order three and weak field ligands
  •  Bond order two and Ï€-acceptors
  •  Isoelectronic and weak field ligands
Solution

Q4. The high density of water compared to ice is due to
  •  Hydrogen bonding interactions
  •  Dipole-dipole interactions
  •  Dipole-induced dipole interactions
  •  Induced dipole induced dipole interactions
Solution
(a) Due to H-bonding in water molecules, water has high density

Q5.Among the following species, identify the isostructural pairs NF_3,NO_3^-,BF_3,H_3 O^+,HN_3
  •  [NF_3,NO_3^- ] and [BF_3,H_3 O^+ ]
  •  [NF_3,HN_3 ] and [NO_3^-,BF_3 ]
  •  [NF_3,H_3 O^+ ] and [NO_3^-,BF_3 ]
  •  [NF_3,H_3 O^+ ] and[HN_3,BF_3 ]
Solution
 


Q6. Which combination will give the strongest ionic bond??
  •  K^+ and Cl^-
  •  K^+ and O^(2-)
  • Ca^(2+)and Cl^-
  •  Ca^(2+)and O^(2-)
Solution
(d) Force of attraction between cation and anion is F=(kz_1 z_2 e^2)/r^2 Where, k is dielectric constant of the medium.z_1 and z_2 are charges on cation and anion, and r the internuclear distance Size ofCl^->O^(2-) K^+>Ca^(2+) Charge onCa^(2+)>K^+ O^(2-)>Cl^-

Q7.Ratio of σ and π bonds is maximum in
  •  Naphthalene
  •  Tetracyano methane
  •  Enolic form of urea
  •  equal
Solution
(c) C

Q8.In which pair or pairs is the strongest bond found in the first species? I: O_2^(2-),O_2; II: N_2,N_2^+ III: NO^+,NO^- :
  •  a) I only
  •  b) II onlyt
  •  c) I and III only
  •  d) II and III only
Solution


Q9.(C-Cl) bond in CH_2=CH-Cl (vinyl chloride) is stabilized in the same way as in
  •  Benzyl chloride
  •  Benzoyl chloridet
  •  Chlorobenzene
  •  Allyl chlorider
Solution
c

Q10. Select the correct statement about resonance
  •  The larger the number of the contributing structures, the greater the stability of the moleculee
  •  Greater number of the covalent bonds add to the stability of the molecule
  •  The positive charge should reside, as far as possible, on the less electronegative element
  • All the above are correct statements
Solution
d.

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CHEMICAL BONDING AND MOLECULAR STRUCTURE- quiz 1
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