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Uses of aldehydes and ketones - class-XII

aldehydes, ketones and carboxylic acids

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Questions

Question 1 Multiple Choice (Single Answer)

The percentage of formaldehyde in formalin is:

  1. $40$%
  2. $30$%
  3. $20$%
  4. $10$%
Question 2 Multiple Choice (Single Answer)

Which of the following is used as a food preservative?

  1. Aldehydes
  2. Ketones
  3. Carboxylic acid
  4. Alcohol
Question 3 Multiple Choice (Single Answer)

Which of the following aldehyde is mostly used as plasticizer?

  1. Formaldehyde
  2. Acetaldehyde
  3. Butyraldehyde
  4. Benzaldehyde
Question 4 Multiple Choice (Single Answer)

Which is the commercially largest produced aldehyde?

  1. Acetaldehyde
  2. Formaldehyde
  3. Benzaldehyde
  4. Butyraldehyde
Question 5 Multiple Choice (Single Answer)

Formalin is:

  1. $60$% solution of formaldehyde
  2. $40$% solution of formaldehyde
  3. $30$% solution of formaldehyde
  4. $50$% solution of formaldehyde
Question 6 Multiple Choice (Single Answer)

Which of the following aldehyde is very much used in perfumery and in dye industries?

  1. Formaldehyde
  2. Acetaldehyde
  3. Benzaldehyde
  4. Butyraldehyde
Question 7 Multiple Choice (Single Answer)

Which of the following does not uses formaldehyde in its preparation?

  1. Melamine polymer
  2. Bakelite
  3. PHBV
  4. preservation of biological specimens
Question 8 Multiple Choice (Single Answer)

A major constituent of vinegar is:

  1. Methanoic acic
  2. Benzoic acid
  3. Ethanoic acid
  4. Picric acid
Question 9 Multiple Choice (Single Answer)

Which of the following doesn't use acetaldehyde as a starting material in its preparation?

  1. Ethyl acetate
  2. Ethanoic acid
  3. Methanoic acid
  4. Drugs
Question 10 Multiple Choice (Single Answer)

Which of the following is used for preserving biological specimens?

  1. Formaldehyde
  2. Ether
  3. Ethyl alcohol
  4. None of these
Question 11 Multiple Choice (Single Answer)

Formaldehyde is used :

  1. for preserving biological specimens
  2. for the preparation of urotropine
  3. in the manufacture of bakelite
  4. all of these
Question 12 Multiple Choice (Single Answer)

Benzaldehyde is used:

  1. as a flavouring agent for food
  2. in the manufacture of triphenylmethane dyes like malachite green
  3. as a starting material for the preparation of cinnamic acid
  4. all of these
Question 13 Multiple Choice (Single Answer)

Which of the following statement is true?

  1. Benzaldehyde is used in perfumery industry
  2. Formaldehyde is used for silvering mirrors
  3. Acetone is used as a commercial solvent
  4. All of the above
Question 14 Multiple Choice (Single Answer)

Formalin is _______ % solution of formaldehyde in water

  1. 10
  2. 20
  3. 40
  4. 60
Question 15 Multiple Choice (Single Answer)

Which of the following is the flavouring agent for food, beverages etc?

  1. Acetone
  2. Formaldehyde
  3. Benzaldehyde
  4. Phenol
Question 16 Multiple Choice (Single Answer)

Which of the following can be used as a solvent for cellulose acetate, cellulose nitrate, and celluloide?

  1. Formaldehyde
  2. Acetaldehyde
  3. Acetic acid
  4. Acetone
Question 17 Multiple Choice (Single Answer)

Acetone is used:

  1. for extraction of essential oils
  2. as a constituent of liquid nail polish
  3. both A and B
  4. none of these
Question 18 Multiple Choice (Single Answer)

Butyraldehyde are produced commercially by:

  1. hydroformylation
  2. hydroacetylation
  3. formylation
  4. acetylation
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