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How will you prepare Secondary, Tertiary...

How will you prepare Secondary, Tertiary, primary alcohol from Grignard reagent ?

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(i) Primary Alcohol
`overset(H)overset(|)underset("formaldehyde")(H-C=O)+CH_3MgClrarrH-underset(CH_3)underset(|)overset(H)overset(|)C-OMgCloverset(H_2"O"//H^(+))rarrCH_3-undersetundersetunderset((1^@" alcohol"))("Ethanol")(H)underset(|)overset(H)overset(|)C-OH`
(ii) `underset("Acetaldehyde")(CH_3-overset(O)overset(||)C-H)+CH_3MgClrarrH_3C-underset(CH_3)underset(|)overset(OMgCl)overset(|)C-Hoverset(H_2"O"//H^(+))rarrH_3C-undersetundersetundersetunderset((2^@"alcohol"))("Pro opan-2-ol)(H)(|)overset(OH)overset(|)C-CH_3`
`underset("Acetone")(CH_3-overset(O)overset(||)C-CH_3)+CH_3MgClrarrH_3C-underset(CH_3)underset(|)overset(OMgCl)overset(|)C-CH_3overset(H_2"O"//H^(+))rarrH_3C-undersetundersetundersetunderset((3^@"alcohol"))("2Methyl Butan-2-ol")(CH_3)(|)overset(OH)overset(|)C-CH_3`
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