Assertion : Chloral reacts with phenyl chloride to form DDT.Reaso

Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

51.

Chain transfer reagent is

  • CCl4

  • CH4

  • O2

  • H2


52.

A catalyst

  • changes the equilibrium constant

  • lowers the activation energy

  • increases the forward and backward reactions at different speeds

  • follows same mechanism for the reaction


53.

Which of the following statement is true?

  • Trimethyl amines form a soluble compound with Hinsberg reagent and KOH.

  • Dimethylamines react with KOH and phenol to form an azo dye.

  • Methylamine reacts with nitrous acid and liberates N2 from aq. soln.

  • None of these


54.

Which of the following is optically inactive?

  • None of these


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55.

Assertion : Benzene diazonium salt on boiling with water forms phenol.

Reason : C- N bond is polar.

  • 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 : Acetamide has more polar -CO group than in ethyl acetoacetate.

Reason : N..H2 is more electron donating than O..C2H5

  • 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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57.

Assertion : Chloral reacts with phenyl chloride to form DDT.

Reason : It is an electrophilic substitution reaction.

  • 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.


C.

If assertion is true but reason is false.

When chlorobenzene is heated with chloral in the presence of conc. H2SO4 , a powerful insecticide DDT is formed with the elimination of water molecule.


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58.

Assertion : Mixture of CH3COOH and CH3COONH4 is an example of acidic buffer.

Reason : Acidic buffer contains equimolar mixture of weak acid and its salt with weak base.

  • 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 : Alkyl iodide can be prepared by treating alkyl chloride/bromide with NaI in acetone.

Reason : NaCl/NaBr are soluble in acetone while NaI is not.

  • 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 : Alpha (α)-amino acids exist as internal salt in solution as they have amino and carboxylic acid groups in near vicinity.

Reason: H+ ion given by carboxylic group (-COOH) is captured by amino group (-NH2) having lone pair of electrons.

  • 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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