Which of the following ions is aromatic? 1 2 3 4 Which one of the following comp

Question

Which of the following ions is aromatic? 1 2 3 4 Which one of the following compounds will have the highest boiling point? CH_3CH_2CH_2CH_2CH_3 CH_3CH_2 CH_2CH_2OH CH_3CH_2CH_2OCH_3 CH_3CH_2CH_2Cl CH_3CH_2OCH_2CH_3 Which one of the following compounds will be least soluble in water? diethyl ether methyl propyl ether 1-butanol 2-butanol pentane Rank the following compounds in decreasing order of boiling points (highest to lowest) CH_3CH_2CH_2CH_2OH CH_3CH_2OCH_2CH_3 HOCH_2CH_2CH_2Oh II > IV > I > III I > IV > II > III IV > I > II > III III > II > I > IV IV > II > I > III Which of the m/z values corresponds to the base peak in the following mass spectrum? 45 44 29 15 none of these

Explanation / Answer

1. Option B, since it obey the Huckle rule of (4n+2) pi electrons (6 pi electrons).

2. Option B, since it forms intermolecular hydrogen bonding

3. Option E, since pentane is non polar. Non polar compounds are not soluble in polar solvent water.

4. Option C, Diol forms more no of hydrogen bondings,hence more boiling point than monohydric alcohol.

5. Option C, since base peak is the one which has maximum intensity.

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