Which one of the following is a Grignard reagent? from Chemistry

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 Multiple Choice QuestionsMultiple Choice Questions

701.

Which of the following represents the correct decreasing order of acidity of the following compounds?

    

  • ii > i > iii > iv

  • iv > iii > ii > i

  • iii > iv > i > ii

  • iv > iii > i > ii


702.

How much ethyl alcohol C2H5OH, must be added to 1.00 L of water so that the solution will not freeze at - 4°F?

  • 211 gm

  • 495 gm

  • 85 gm

  • 46 gm


703.

What will be the major product when 2-amino propane is treated with nitrous acid?

  • Propane-2-ol

  • Cyclopropene

  • Propanol

  • 2-rntropropane


704.

Which of the following compounds is most acidic?

  • Cl-CH2-CH2-OH


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705.

Phenol + CCl4 + KOH → X; 

Which of the following statement is true for X?

  • It gives effervescence with NaHCO3

  • Gives silver mirror with Tollen's reagent

  • Does not give the red colour with FeCl3

  • All of the above


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706.

Which one of the following is a Grignard reagent?

  • CH3OMgI

  • C6H5MgBr

  • C2H5OMgBr

  • (C2H5)4Pb


B.

C6H5MgBr

Grignard reagents are organometallic compounds in whch one valency of Mg is saturated with organic group (alkyl, aryl etc) and other valency is saturated with halogen , i.e , it is RMgX.


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707.

Which of the following compounds contain atleast one secondary alcohol?

 

  • (i), (ii), (iii), (v)

  • (i), (iii), (v)

  • (i), (ii), (iv), (vi)

  • (i), (ii), (iii)


708.

When Grignard reagentreacts with ketone, it yields

  • 3° alcohol

  • ethanol

  • 1° alcohol

  • 2° alcohol


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709.

Which of the following reacts fastest with conc.HCl ?

  • (CH3)3COH

  • CH2=CH-CH2OH


710.

Number of esters of the molecular formula C3H6O2 can be

  • 4

  • 3

  • 2

  • 1


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