Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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51.

In Oppenauer's oxidation,

  • secondary alcohol is oxidised to carboxylic acid in acetone solvent using aluminium tertiary butoxide

  • secondary alcohol is oxidised to carboxylic acid without affecting the C=C or C=C bond by aluminium tertiary butoxide in acetone solvent

  • secondary alcohol is oxidised to ketone without affecting C=C or C=C bond by aluminium tertiary butoxide

  • secondary alcohol is oxidised to ketone by chromic acid - pyridine complex.


C.

secondary alcohol is oxidised to ketone without affecting C=C or C=C bond by aluminium tertiary butoxide

In Oppenauer's oxidation, secondary alcohol is oxidised to corresponding ketone in the presence of aluminium tertiary butoxide. Other oxidisable groups are not affected.


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52.

In one reaction, is treated with CH3CN and then hydrolysed. In another reaction  is treated with ethyl acetate and then hydrolysed.

A and B are


53.

In the following sequence of the reactions, identify the final product.


54.

Assertion : In fused state, calcium chloride cannot be used to dry alcohol or NH3.

Reason : CaCl2 is not a good dessicant.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


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55.

Assertion : Ethers can be dried by using sodium wire.

Reason : Ethers do not react with sodium.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false


56.

Assertion : p-N,N-dimethylaminobenzaldehyde undergoes benzoin condensation.

Reason : The aldehydic (-CHO) group is meta directing.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false


57.

Assertion: C2H5Br reacts with alcoholic solution of AgNO2 to form nitroethane as the major product.

Reason : NO2- is an ambidient ion.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false


58.

Assertion : Ebonite is highly vulcanised rubber.

Reason : Perlon is used in the manufacture of fibres.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


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59.

Assertion : Esters which contain α-hydrogens undergo Claisen condensation.

Reason : LiAlH4 reduction of esters gives acids.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false


60.

Assertion: Million's test is a test for identification of proteins.

Reason : Millon's reagent is a solution of mercurous nitrate and mercuric nitrate in nitric acid containing little nitrous acid.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false


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