Which is not present in Grignard reagent ? from Chemistry Haloal

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 Multiple Choice QuestionsMultiple Choice Questions

151.

In the reaction,

CH3CH2C ≡ CH (ii) H2O(i) O3 Products

Products will be:

  • CH3COCH3

  • CH3COCH2OH

  • CH3COOH + HCOOH

  • CH3CHO + HCHO


152.

Ethyl alcohol can be prepared from Grignard reagent by the reaction of :

  • HCHO

  • R2CO

  • RCN

  • RCOCl


153.

The compound formed on heating chlorobenzene with chloral in the presence of concentrated sulphuric acid is

  • gammexane

  • DDT

  • freon

  • hexachloroethane


154.

Ethyl alcohol is used as a preservative for chloroform because it :

  • prevent aerial oxidation of chloroform

  • prevents decomposition of chloroform

  • decomposes phosgene to CO and Cl2

  • removes phosgene by converting it to ethyl carbonate


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155.

Protic solvent is

  • diethyl ether

  • n-hexane

  • acetone

  • ethanol


156.

Mustrad gas is

  • oil gas

  • poisonous gas

  • fuel gas

  • life gas


157.

Which among the following is a catalyst for the preparation of Grignard reagent ?

  • Iron powder

  • Iodine powder

  • Activated charcoal

  • Manganese dioxide


158.

The chirality of the compound

  • R

  • S

  • Z

  • E


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159.

Which is not present in Grignard reagent ?

  • Methyl group

  • Magnesium ion

  • Halogen atom

  • Carboxylic group


D.

Carboxylic group

The general formula of Grignard reagent is RMgX (an organometallic compound). Thus, carboxylic group is not present in Grignard reagent.

Methyl group → R-Mg-X ← Halogen atom


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160.

Which ligand is useful for removal of the toxic effect of lead metal in body in chelate therapy treatment?

  • AsO43-

  • CH3COO-

  • (COO-)2


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