Identify the molecular formula of dimethyl ether from the given compounds.

{CH}_{3} - O - {CH}_{3}

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{CH}_{3} - {CH}_{2} - O - {CH}_{3}

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{CH}_{3} - {CH}_{2} - O - {CH}_{2} - {CH}_{3}

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{CH}_{3} - CO - {CH}_{2} - {CH}_{3}

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Solution

The correct option is A ${CH}_{3} - O - {CH}_{3}$
${CH}_{3} - O - {CH}_{3}$ is the structural representation of dimethyl ether as two methyl groups are attached to one oxygen atom. Its IUPAC name is methoxymethane.

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C H_{3} - C H_{2} - C H_{2} - C H_{3} C o n c . H C l, A l C l_{3} - --------- \to C H_{3} - C H | C H_{3} - C H_{3}

An alkane with molecular formula $C_{6} H_{14}$ gives two monochloro alkanes on chlorination. What is the structure of alkane?

(i) C H_{3} - C H_{2} - C H_{2} - C H_{3} T h e r m a l C r a c k i n g - ---------- \to C H_{3} - C H_{3} + P

(i i) P + H_{2} H_{2} - \to Q

(i i i) Q + C l_{2} S u n l i g h t - ---- \to R

P, Q, R

The following two molecules are examples of
$C H_{3} - C H_{2} - O - C H_{2} - C H_{3} C H_{3} - C H_{2} - C H_{2} - C H_{2} - O H$

C H_{3} - C H_{2} - C H_{2} - B r C H_{3} C H_{2} O H / C H_{3} C H_{2} O^{-} - --------------- \to △ C H_{3} - C H = C H_{2}

H_{3} C - C H (B r) - C H_{3} C H_{3} C H_{2} O H / H_{2} O - ---------- \to △ C H_{3} - C H = C H_{2}

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