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Which of the following is correct?

  • a)
    On reduction any aldehyde gives secondary alcohol

  • b)
    Reaction of vegetable oil with H2SO4 gives glycerine

  • c)
    Alcoholic iodine with NaOH gives iodoform

  • d)
    Sucrose on reaction with NaCl gives invert sugar

Correct answer is option 'C'. Can you explain this answer?
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Reduction of Aldehydes and Ketones

Aldehydes and ketones can be reduced to primary and secondary alcohols, respectively, using reducing agents such as NaBH4 or LiAlH4. However, the statement "any aldehyde gives secondary alcohol on reduction" is incorrect.

Reaction of Vegetable Oil with H2SO4

Vegetable oils are triglycerides, which can be hydrolyzed using an acid catalyst such as H2SO4 to produce glycerol and fatty acids. Therefore, the statement "reaction of vegetable oil with H2SO4 gives glycerine" is correct.

Iodoform Test

The iodoform test is used to detect the presence of a methyl ketone or a compound containing a CH3-CO- group. In this test, ethanol (C2H5OH) and iodine (I2) are added to the compound in the presence of a strong base such as NaOH. If the compound contains a methyl ketone or a CH3-CO- group, it will react with the reagents to produce iodoform (CHI3) and a carboxylic acid or a salt of the acid. Therefore, the statement "C2H5OH, iodine with NaOH gives iodoform" is correct.

Hydrolysis of Sucrose

Sucrose is a disaccharide composed of glucose and fructose. When sucrose is hydrolyzed using NaCl, it undergoes inversion to form glucose and fructose, which are both reducing sugars. Therefore, the statement "sucrose on reaction with NaCl gives invert sugar" is correct.

In conclusion, option 'C' is the correct answer.
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Read the passage given below and answer the following questions:Reductive alkylation is the term applied to the process of introducing alkyl groups into ammonia or a primary or secondary amine by means of an aldehyde or ketone in the presence of a reducing agent. The present discussion is limited to those reductive alkylations in which the reducing agent is hydrogen and a catalyst or "nascent" hydrogen, usually from a metalacid combination; most of these reductive alkylations have been carried out with hydrogen and a catalyst. The principal variation excluded is that in which the reducing agent is formic acid or one of its derivatives; this modification is known as the Leuckart reaction. The process of reductive alkylation of ammonia consists in the addition of ammonia to a carbonyl compound and reduction of the addition compound or its dehydration product. The reaction usually is carried out in ethanol solution when the reduction is to be effected catalytically:Since the primary amine is formed in the presence of the aldehyde it may react in the same way as ammonia, yielding an additional compound, a Schiff's base (RCH= NCH2R) and finally, a secondary amine. Similarly, the primary amine may react with the imine, forming an addition product which also is reduced to a secondary amine Finally, the secondary amine may react with either the aldehyde or the imine to give products which are reduced to tertiary amines.Similar reactions may occur when the carbonyl compound employed is a ketone.Q. The reaction of ammonia and its derivatives with aldehydes is called

Which of the following is correct?a)On reduction any aldehyde gives secondary alcoholb)Reaction of vegetable oil withH2SO4gives glycerinec)Alcoholic iodine withNaOHgives iodoformd)Sucrose on reaction withNaClgives invert sugarCorrect answer is option 'C'. Can you explain this answer?
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Which of the following is correct?a)On reduction any aldehyde gives secondary alcoholb)Reaction of vegetable oil withH2SO4gives glycerinec)Alcoholic iodine withNaOHgives iodoformd)Sucrose on reaction withNaClgives invert sugarCorrect answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which of the following is correct?a)On reduction any aldehyde gives secondary alcoholb)Reaction of vegetable oil withH2SO4gives glycerinec)Alcoholic iodine withNaOHgives iodoformd)Sucrose on reaction withNaClgives invert sugarCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is correct?a)On reduction any aldehyde gives secondary alcoholb)Reaction of vegetable oil withH2SO4gives glycerinec)Alcoholic iodine withNaOHgives iodoformd)Sucrose on reaction withNaClgives invert sugarCorrect answer is option 'C'. Can you explain this answer?.
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