CHEMISTRY CHEMICAL BONDING QUIZ-8
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Q1. Which bond has the highest bond energy?
Solution
Bond energy increases with multiplicity of bonds.
Bond energy increases with multiplicity of bonds.
Q2.Which among the following elements has lowest value of ionisation energy?
Solution
Ionization energy decreases down the group.
Ionization energy decreases down the group.
Q3. Which one of the following molecules has the smallest bond angle?
Solution
Bond angles of NH3=107°,H2 Se=91.0°,H2 O=104.5°,H2 S=92.2° So, the H2 Se molecule has smallest bond angle.
Bond angles of NH3=107°,H2 Se=91.0°,H2 O=104.5°,H2 S=92.2° So, the H2 Se molecule has smallest bond angle.
Q4. Elements have electronegativities 1.2 and 3.0, bond formed between them would be
Solution
Since, the electronegativity (EN) different is 3.0-1.2=1.8, which is less than 1.9, therefore, bond is expected to be covalent
Since, the electronegativity (EN) different is 3.0-1.2=1.8, which is less than 1.9, therefore, bond is expected to be covalent
Q5.What bond order does O22- have?
Solution
Q6. CO2 is isostructural with
Solution
Structure of C2 H2 is linear. H-C ≡C- H Structure of CO2 is also linear O=C=O So, both are isostructural species.
Structure of C2 H2 is linear. H-C ≡C- H Structure of CO2 is also linear O=C=O So, both are isostructural species.
Q7.Which of the following atoms has minimum covalent radius?
Solution
N atom has smallest radius.
N atom has smallest radius.
Q8.The percentage of p– character in the orbitals forming P – P bonds in P4 is
Solution
Phosphorus atom is sp3 hybridised in P4 usually. Therefore, p-character 75%
Phosphorus atom is sp3 hybridised in P4 usually. Therefore, p-character 75%
Q9.The molecule having zero dipole moment is
Solution
Q10. Molecular size of ICl and Br2 is nearly same, but boiling point of ICl is about 40°C higher than Br2. This might be due to:
Solution
Polarity in a molecule gives rise to an increase in forces of attractions among molecules and thus, more becomes boiling point.
Polarity in a molecule gives rise to an increase in forces of attractions among molecules and thus, more becomes boiling point.
