Tag: aldehydes, ketones and carboxylic acids

Quizzes (4) Questions (20)

Questions Related to aldehydes, ketones and carboxylic acids

Multiple choice chemistry aldehydes, ketones and carboxylic acids alkanoic acids nomenclature of carboxyl group nomenclature of carboxylic acids

Sodium salt of an organic acid 'X' produces effervescence with conc. $H _2SO _{4}$. 'X' reacts with the acidified aqueous $CaCl _2$ solution to give a white precipitate which decolourises acidic solution of $KMnO _4$. 'X' is 

  1. $C _6H _5COONa$
  2. $HCOONa$
  3. $CH _3COONa$
  4. $Na _2C _2O _4$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sodium oxalate (Na2C2O4) reacts with H2SO4 to release CO/CO2, and with CaCl2 to form calcium oxalate (white precipitate). Calcium oxalate is then oxidized by KMnO4 in acidic medium.

Multiple choice chemistry aldehydes, ketones and carboxylic acids uses of aldehydes and ketones organic compounds with functional group containing oxygen (part-2) carbonyl compounds

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

  1. Formaldehyde

  2. Acetaldehyde

  3. Benzaldehyde

  4. Butyraldehyde
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Benzaldehyde is much used perfumery industries because it has bitter almond odor and also it is used for making aniline dye.
Multiple choice chemistry aldehydes, ketones and carboxylic acids uses of aldehydes and ketones organic compounds with functional group containing oxygen (part-2) carbonyl compounds

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

  1. Melamine polymer

  2. Bakelite

  3. PHBV

  4. preservation of biological specimens
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Formaldehyde is not used in the preparation of PHBV. PHBV is a thermoplastic polymer. The monomers, 3-hydroxybutanoic acid and 3-hydroxypentanoic acid, are joined by ester bonds; the back bone of the polymer is made up of carbon and oxygen atoms.

Multiple choice chemistry aldehydes, ketones and carboxylic acids uses of aldehydes and ketones organic compounds with functional group containing oxygen (part-2) carbonyl compounds

A major constituent of vinegar is:

  1. Methanoic acic

  2. Benzoic acid

  3. Ethanoic acid

  4. Picric acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The main constituent of vinegar is acetic acid. The other constituents will depend on the nature of the raw material that has undergone fermentation.

Hence, option $C$ is correct.