Preparation of Alcohols from Grignard Reagents

Q.

1. RCHOH.CH₃

2. RCHOHR

3. 
   

4. 
   

Q. Reaction of Grignard reagent, $C_2{H}_{5}MgBr$ with $C_8{H}_{8}O$ followed by hydrolysis gives compound A which reacts instantly with Lucas reagent to give compound B, $C_{10}{H}_{13}Cl$.
Compound (B) is

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Q. Major product obtained when propanone reacts with methylmagnesium bromide followed by hydrolysis.

1. 2-methyl-propan-2-ol
2. propane
3. 1-butene
4. 2-butanol

Q. The product ‘A’ in the following reaction is

1. RCHOHR
2. R - CH₂ - CH₂ - OH
3. RCHOH . CH₃
4. 
   
   
   

Q. In the given reaction

1. a
2. c
3. b
4. d

Q.

Which one of the following will produce a primary alcohol by reacting with CH₃Mgl [MP PET 1991]

1. Ethyl acetate

2. Methyl cyanide

3. Acetone

4. Ethylene oxide

Q. What is/are the correct option(s) about the reaction given below and the product formed?

1. There is inversion of configuration of carbon 1 and 2 in the product
2. There is inversion of configuration of carbon 1 but retention of carbon 2 in the product
3. The product is
   
4. There is inversion of configuration of carbon 2 but retention of carbon 1 in the product

Q. Predict the product.

1. 
2. 
3. 
4. 

Q. The reaction of compound P with $C{H}_{3}MgBr$(excess) in $(C_2{H}_5{)}_{2}O$ followed by addition of $H_{2}O$ gives Q. The compound Q on treatment with $H_{2}S{O}_4$ at $0^{\circ }C$ gives R. The reaction of R with $C{H}_{3}COCl$ in the presence of anhydrous $AlC{l}_3$ in $C{H}_{2}C{l}_2$ followed by treatment with $H_{2}O$ produces compound S [Et in compound P is ethyl group]


The reactions, Q to R and R to S, are:

1. Dehydration and Friedel-Crafts acylation
2. Aromatic sulfonation and Friedel-Crafts acylation
3. Friedel-Crafts alkylation, dehydration and Friedel-Crafts acylation
4. Friedel-Crafts alkylation and Friedel-Crafts acylation

Q. 69 mg of an alcohol $(R-OH)$ was treated with $C{H}_{3}MgBr$ and the gas evolved was measured to be 33.6 ml at STP. The molar mass (g/mol) of alcohol is .