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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Ethylbenzene is generally prepared by acetylation of benzene followed by reduction and not by direct alkylation. Think of a possible reason. - Chemistry

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प्रश्न

Ethylbenzene is generally prepared by acetylation of benzene followed by reduction and not by direct alkylation. Think of a possible reason.

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उत्तर


In (ii) reaction, it readily undergoes further alkylation to produce polysubs- tituted derivative.

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पाठ 12: Aldehydes, Ketones and Carboxylic Acids - Multiple Choice Questions (Type - I) [पृष्ठ १७३]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 12 Aldehydes, Ketones and Carboxylic Acids
Multiple Choice Questions (Type - I) | Q 36 | पृष्ठ १७३

संबंधित प्रश्‍न

Write the product in the following reaction


Write the product in the following reaction:


How will you bring about the following conversion?

Benzoyl chloride to benzaldehyde.


Write the structure of the product of the following reaction:


When 0.4 g of acetic acid is dissolved in 40 g of benzene, the freezing point of the solution is lowered by 0.45 K. Calculate the degree of association of acetic acid. Acetic acid forms dimer when dissolved in benzene.
(Kf for benzene = 5.12 K kg mol−1, at. wt. C = 12, H = 1, O = 16)


Aldehydes are produced on reduction of the following by DIBAL-H:


The oxidation of toluene to benzoic acid can be done using which of the following reagents.


Can Gatterman-Koch reaction be considered similar to Friedel Craft’s acylation? Discuss.


Match the common names given in Column I with the IUPAC names given in Column II.

  Column I
(Common names)
  Column II
(IUPAC names)
(i) Cinnamaldehyde (a) Pentanal
(ii) Acetophenone (b) Prop-2-enal
(iii) Valeraldehyde (c) 4-Methylpent-3-en-2-one
(iv) Acrolein (d) 3-Phenylprop-2-enal
(v) Mesityl oxide (e) 1-Phenylethanone

Match the acids given in Column I with their correct IUPAC names given in Column II.

  Column I
(Acids)
  Column II
(IUPAC names)
(i) Phthalic acid (a) Hexane-1,6-dioic acid
(ii) Oxalic acid (b) Benzene-1,2-dicarboxylic acid
(iii) Succinic acid (c) Pentane-1,5-dioic acid
(iv) Adipic acid (d) Butane-1,4-dioic acid
(v) Glutaric acid (e) Ethane-1,2-dioic acid

An aromatic compound ‘A’ (Molecular formula \[\ce{C8H8O}\]) gives positive 2, 4-DNP test. It gives a yellow precipitate of compound ‘B’ on treatment with iodine and sodium hydroxide solution. Compound ‘A’ does not give Tollen’s or Fehling’s test. On drastic oxidation with potassium permanganate it forms a carboxylic acid ‘C’ (Molecular formula \[\ce{C7H6O2}\]), which is also formed along with the yellow compound in the above reaction. Identify A, B and C and write all the reactions involved.


In the chromyl chloride test, the final step results in the formation of a yellow precipitate of the following:


The strongest base among the following


The number of chiral carbon in glucose is:-


Predict the reagent for carrying out the following transformations:

Benzoyl chloride to Benzaldehyde


The reaction of benzene with CO and HCl in the presence of anhydrous AlCl3 gives ______.


Reagent used to convert allyl alcohol to acrolein is ______.


Write the name of the reaction, structure and IUPAC name of the product formed when:

CH3CH2CN reacts with stannous chloride in the presence of hydrochloric acid, followed by hydrolysis.


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