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Grignard Reagent
Quiz 1
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Q.1
Grignard reagent is not prepared in aqueous medium but prepared; in ether medium because thereagent…………..
Is highly reactive in ether
Is insoluble in water
Reacts with water
Becomes inactive in water
Q.2
Chemical name of Grignard reagent is
Sodium thiosulphate
Ethyl magnesium chloride
Sodium bicarbonate
Sodium sulphite
Q.3
Chemical name of Grignard reagent is
Sodium thiosulphate
Ethyl magnesium chloride
Sodium bicarbonate
Sodium sulphite
Q.4
Which of the following reagents, when treated with phenylmagnesiuim bromide followed by acid workup, will yield 2-phenylethanol?
Diethyl ether
Ethanol
Ethanal
Oxirane
Q.5
Which of the following compounds would not give tert-butyl alcohol when treated with excess methylmagnesium bromide?
acetyl chloride
methyl acetate
acetic anhydride
acetaldehyde
Q.6
Which of the following compounds gives a secondary alcohol upon reaction with methylmagnesium bromide?
Butyl formate
Pentanal
3- pentanone
Methyl butanoate
Q.7
Which is not present in Grignard reagent?
Halogen
−COOH group
Magnesium
Methyl group
Q.8
Alkyl halides can be converted into Grignard reagents by _______________
Warming them with Mgcl2
Boiling them with Mg ribbon in alcoholic solution
Warming them with magnesium powder in dry ether
Refluxing them with MgCl2 solution
0 h : 0 m : 1 s
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