313895
Which of the following has polar bonds and is non-polar molecule?
1 \({{\rm{H}}_{\rm{2}}}{\rm{O}}\)
2 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
3 \({\rm{Be}}{{\rm{F}}_{\rm{2}}}\)
4 \({\rm{N}}{{\rm{F}}_{\rm{3}}}\)
Explanation:
Conceptual Questions
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313896
Assertion : \(\mathrm{CCl}_{4}\) is non-polar while \(\mathrm{CH}_{2} \mathrm{Cl}_{2}\) is polar molecule. Reason : Molecule with zero dipole moment is non-polar in nature.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
\(\mathrm{CCl}_{4}\) is nonpolar because the bond polarity gets canceled with each other due to the symmetrical geometrical structure of the \(\mathrm{CCl}_{4}\) molecule. In \(\mathrm{CH}_{2} \mathrm{Cl}_{2}\) the two \(\mathrm{C}-\mathrm{Cl}\) bond sipole do not get cancelled. Thus there is a bet dipole moment and the molecule is polar. So the option (1) is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313897
Assertion : \(\mathrm{Be}\) (among alkaline earth metals) predominantly forms covalent bond. Reason : Be is smaller in size and hence, has greater polarising power.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Beryllium, unlike other alkaline earth metals, predominantly forms covalent bonds due to its small size and strong attraction for valence electrons, preferring electron sharing with nonmetals for increased stability. So the option (1) is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313898
Three mono sulphur fluorides are known \(\mathrm{SF}_{2}, \mathrm{SF}_{4}\), and \(\mathrm{SF}_{6}\). Out of these, which are polar species?
1 \(\mathrm{SF}_{2}\) only
2 \(\mathrm{SF}_{4}\) only
3 \(\mathrm{SF}_{2}\) and \(\mathrm{SF}_{4}\) only
4 \(\mathrm{SF}_{2}, \mathrm{SF}_{4}\) and \(\mathrm{SF}_{6}\)
313895
Which of the following has polar bonds and is non-polar molecule?
1 \({{\rm{H}}_{\rm{2}}}{\rm{O}}\)
2 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
3 \({\rm{Be}}{{\rm{F}}_{\rm{2}}}\)
4 \({\rm{N}}{{\rm{F}}_{\rm{3}}}\)
Explanation:
Conceptual Questions
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313896
Assertion : \(\mathrm{CCl}_{4}\) is non-polar while \(\mathrm{CH}_{2} \mathrm{Cl}_{2}\) is polar molecule. Reason : Molecule with zero dipole moment is non-polar in nature.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
\(\mathrm{CCl}_{4}\) is nonpolar because the bond polarity gets canceled with each other due to the symmetrical geometrical structure of the \(\mathrm{CCl}_{4}\) molecule. In \(\mathrm{CH}_{2} \mathrm{Cl}_{2}\) the two \(\mathrm{C}-\mathrm{Cl}\) bond sipole do not get cancelled. Thus there is a bet dipole moment and the molecule is polar. So the option (1) is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313897
Assertion : \(\mathrm{Be}\) (among alkaline earth metals) predominantly forms covalent bond. Reason : Be is smaller in size and hence, has greater polarising power.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Beryllium, unlike other alkaline earth metals, predominantly forms covalent bonds due to its small size and strong attraction for valence electrons, preferring electron sharing with nonmetals for increased stability. So the option (1) is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313898
Three mono sulphur fluorides are known \(\mathrm{SF}_{2}, \mathrm{SF}_{4}\), and \(\mathrm{SF}_{6}\). Out of these, which are polar species?
1 \(\mathrm{SF}_{2}\) only
2 \(\mathrm{SF}_{4}\) only
3 \(\mathrm{SF}_{2}\) and \(\mathrm{SF}_{4}\) only
4 \(\mathrm{SF}_{2}, \mathrm{SF}_{4}\) and \(\mathrm{SF}_{6}\)
313895
Which of the following has polar bonds and is non-polar molecule?
1 \({{\rm{H}}_{\rm{2}}}{\rm{O}}\)
2 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
3 \({\rm{Be}}{{\rm{F}}_{\rm{2}}}\)
4 \({\rm{N}}{{\rm{F}}_{\rm{3}}}\)
Explanation:
Conceptual Questions
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313896
Assertion : \(\mathrm{CCl}_{4}\) is non-polar while \(\mathrm{CH}_{2} \mathrm{Cl}_{2}\) is polar molecule. Reason : Molecule with zero dipole moment is non-polar in nature.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
\(\mathrm{CCl}_{4}\) is nonpolar because the bond polarity gets canceled with each other due to the symmetrical geometrical structure of the \(\mathrm{CCl}_{4}\) molecule. In \(\mathrm{CH}_{2} \mathrm{Cl}_{2}\) the two \(\mathrm{C}-\mathrm{Cl}\) bond sipole do not get cancelled. Thus there is a bet dipole moment and the molecule is polar. So the option (1) is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313897
Assertion : \(\mathrm{Be}\) (among alkaline earth metals) predominantly forms covalent bond. Reason : Be is smaller in size and hence, has greater polarising power.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Beryllium, unlike other alkaline earth metals, predominantly forms covalent bonds due to its small size and strong attraction for valence electrons, preferring electron sharing with nonmetals for increased stability. So the option (1) is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313898
Three mono sulphur fluorides are known \(\mathrm{SF}_{2}, \mathrm{SF}_{4}\), and \(\mathrm{SF}_{6}\). Out of these, which are polar species?
1 \(\mathrm{SF}_{2}\) only
2 \(\mathrm{SF}_{4}\) only
3 \(\mathrm{SF}_{2}\) and \(\mathrm{SF}_{4}\) only
4 \(\mathrm{SF}_{2}, \mathrm{SF}_{4}\) and \(\mathrm{SF}_{6}\)
313895
Which of the following has polar bonds and is non-polar molecule?
1 \({{\rm{H}}_{\rm{2}}}{\rm{O}}\)
2 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
3 \({\rm{Be}}{{\rm{F}}_{\rm{2}}}\)
4 \({\rm{N}}{{\rm{F}}_{\rm{3}}}\)
Explanation:
Conceptual Questions
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313896
Assertion : \(\mathrm{CCl}_{4}\) is non-polar while \(\mathrm{CH}_{2} \mathrm{Cl}_{2}\) is polar molecule. Reason : Molecule with zero dipole moment is non-polar in nature.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
\(\mathrm{CCl}_{4}\) is nonpolar because the bond polarity gets canceled with each other due to the symmetrical geometrical structure of the \(\mathrm{CCl}_{4}\) molecule. In \(\mathrm{CH}_{2} \mathrm{Cl}_{2}\) the two \(\mathrm{C}-\mathrm{Cl}\) bond sipole do not get cancelled. Thus there is a bet dipole moment and the molecule is polar. So the option (1) is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313897
Assertion : \(\mathrm{Be}\) (among alkaline earth metals) predominantly forms covalent bond. Reason : Be is smaller in size and hence, has greater polarising power.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Beryllium, unlike other alkaline earth metals, predominantly forms covalent bonds due to its small size and strong attraction for valence electrons, preferring electron sharing with nonmetals for increased stability. So the option (1) is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313898
Three mono sulphur fluorides are known \(\mathrm{SF}_{2}, \mathrm{SF}_{4}\), and \(\mathrm{SF}_{6}\). Out of these, which are polar species?
1 \(\mathrm{SF}_{2}\) only
2 \(\mathrm{SF}_{4}\) only
3 \(\mathrm{SF}_{2}\) and \(\mathrm{SF}_{4}\) only
4 \(\mathrm{SF}_{2}, \mathrm{SF}_{4}\) and \(\mathrm{SF}_{6}\)
