Short Answer TypeWhat causes the two atoms to combine to form a bond which is:
(i) Non-polar
(ii) Polar-covalent and
(iii) Ionic in nature?
Long Answer TypeBriefly explain the term 'Dipole moment'. How is it expressed and what are its units?
Although both CO2 and H2O are triatomic molecules, the shape of H2O molecule is bent While that of CO2 is linear. Explain this on the basis of dipole moment.
Short Answer TypeExplain why BeH2 molecule has a zero dipole moment although the Be-H bonds are polar?
Long Answer TypeSketch the bond moments and resultant dipole moment in SO2, cis and trans forms of CH2Cl2.
SO2: SO2 molecule has a bent shape in which two S = O bonds are oriented at an angle of 119-5°. The bond dipoles and the resultant dipole moment in the SO2 molecule are represented as shown.
Cis form of CH2Cl2 has two chlorine atoms on the same side has a small resultant dipole moment while trans– form of CH2Cl2 has two chlorine atoms on the opposite side, the bond dipoles of the two C – Cl bonds cancel each other.
Therefore the resultant dipole moment of trans form is zero.
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