Which one of the following exhibits dipole-dipole attraction between mole XeF_4

Question

Which one of the following exhibits dipole-dipole attraction between mole XeF_4 AsH_3 CO_2 BCl_3 Cl_2 What types of intcrmolecular forces exist between PH_3 and N_2? dispersion forces and dipole-dipole forces dispersion forces and dipole-induced dipole forces dispersion forces and hydrogen bonds dispersion forces, hydrogen bonds, and induced dipole-induced dipole for dispersion forces, hydrogen bonds, and dipole-induced dipole forces Of the following substances,________has the highest boiling point. H_2O CO_2 CH_4 Kr NH_3 Which element is oxidized in the reaction below? Fe^+2 + H^+ + Cr_2O_7^-2 rightarrow Fe^+3 + Cr^+3 + H_2O Fe Cr O H

Explanation / Answer

Answers,

1.

B).........AsH3  

Explanation -

(i) None of the given molecules have a net dipole moment except

(ii )  AsH3 which has a dipole moment , therefore ,

(iii) it would exhibit intermolecular dipole - dipole attractions.

2.

B) ......Dispersion forces and dipole- induced dipole forces.

because PH3 has a dipole moment , but N2 being diatomic is nonpolar.

3.

A) water

Water has the highest boiling point due to hydrgen - bondings in its molecule.

4.

A) Fe

increase in oxidation number or loss of electron is termed as oxidation. In this case the Oxidation No. of iron (Fe) increases from 2+ to 3 + , due to reaction -

............Fe2+   + H+   + Cr2 O72-   -----------> Fe3+   + Cr3+   + H2 O

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