MCQ
Ethers show dipolar nature due to the presence of ______.
- ACentral C atom
- BCentral O atom
- CCentral N atom
- DNone of these
Explanation:
Ethers have general structural formula R-O-R'. Hence all of them have the C-O bond. We know that the C-O bond is polar due to the difference between the electronegativities of carbon and oxygen. Hence, ethers show dipolar nature.
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Compound $(D)$ is sodium hexametaphosphate which is known as
Assertion $(A)$ : $\mathrm{PH}_3$ has lower boiling point than $\mathrm{NH}_3$.
Reason $(R)$ : In liquid state $\mathrm{NH}_3$ molecules are associated through vander waal's forces, but $\mathrm{PH}_3$ molecules are associated through hydrogen bonding. In the light of the above statements, choose the most appropriate answer from the options given below:
$(A)$ $NH _4 NO _3$ $(B)$ $\left( NH _4\right)_2 Cr _2 O _7$ $(C)$ $Ba \left( N _3\right)_2$ $(D)$ $Mg _3 N _2$