Q: Which of these molecules are polar? Check all that apply.
- 1SO2false
- 2CH2Cl2false
- 3PCl3false
- 4All the abovetrue
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Answer : 4. "All the above"
Explanation :
Answer: D) All the above Explanation: 1) SO2 2) CH2Cl2 3) PCl3 How to check the given molecules are polar or non polar : If the electronegativity of the two bonded atoms are different then the bond is polar. Although, some molecules contain polar bonds, the molecule may be non-polar. If the polarity of all the bonds present in the molecule are cancel each other then molecule is non-polar. In the given options, SO2 is polar because the dipole moments on the O do not cancel. PCl3 is polar because the P-Cl bonds do not cancel out. CH2Cl2 polar because the C-Cl bonds do not cancel. Hence, in brief, Polar molecules are molecules with net dipole due to the presence of partial positive and partial negative charge. For example, water is a polar molecule that has partial positive and partial negative charge on it. CO2 is a non polar compound. Therefore, all the given options SO2, CH2Cl2 and PCl3 are Polar molecules.