Chemistry

Chemical Bonding and Molecular Structure

1,420 Questions

This section tests your knowledge of chemical bonding, molecular structure, and hybridization. It covers ionic and covalent bonds, octet rule exceptions, and molecular geometry. These chemistry questions are common in various competitive entrance examinations.

Ionic and covalent bondsHybridisation of elementsOctet rule exceptionsMolecular geometryIntermolecular forces

Chemical Bonding and Molecular Structure Questions

Multiple choice

The property of catenation is more marked in the case of

  1. silicon

  2. hydrogen

  3. oxygen

  4. carbon
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The property of catenation is more marked in the case of carbon. Bond strength of M – M bond and the tendency for catenation decrease in the following order: C – C > Si – Si > Ge – Ge > Sn – Sn  So, carbon has the maximum catenation property.

Multiple choice

The property of catenation is more marked in the case of

  1. silicon

  2. hydrogen

  3. oxygen

  4. carbon
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The property of catenation is more marked in the case of carbon. Bond strength of M – M bond and the tendency for catenation decrease in the following order: C – C > Si – Si > Ge – Ge > Sn – Sn  So, carbon has the maximum catenation property.

Multiple choice

The property of catenation is more marked in the case of

  1. silicon

  2. hydrogen

  3. oxygen

  4. carbon
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The property of catenation is more marked in the case of carbon. Bond strength of M – M bond and the tendency for catenation decrease in the following order: C – C > Si – Si > Ge – Ge > Sn – Sn  So, carbon has the maximum catenation property.

Multiple choice

Which of the following is the strongest conjugate base?

  1. Cl-

  2. CH3COO-

  3. SO42-

  4. NO2-
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This option is correct as we know that the strongest conjugate base will have a weak conjugate acid. For the given option CH3COOH will be the conjugate acid which is a weak acid  among the other options.

Multiple choice

What concentration of magnesium ions is required for joining of ribosomes to form dimers?

  1. Mg++ ion concentration is 0.001 M

  2. Mg++ ion concentration is 0.01 M

  3. Mg++ ion concentration is less than 0.0001 M

  4. Mg++ ion concentration is more than 0.02 M
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 At this concentration, the ribosomes combine in pairs, to form dimers, each of which has a sedimentation coefficient of 120 S.(�S� is the sedimentation coefficient & is also known as �Svedberg Unit� ).

Multiple choice

A compound is formed by two atoms P and Q. Atoms of the anion Q form CCP and those of the cation P occupy all the octahedral voids. What is the formula of that compound?

  1. PQ3

  2. P3Q2

  3. PQ2

  4. P2Q

  5. PQ
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The CCP lattice is formed by the element Q. The number of octahedral voids generated would be equal to the number of atoms of A present in it. Since all the octahedral voids are occupied by the atoms of P, their number would also be equal to that of the element Q. Thus, the atoms of elements P and Q are present in equal numbers or 1:1 ratio. Therefore, the formula of the compound is PQ.