HomeTestsSearchRankProfile
mediumMCQChemistryChemistry
4 marks (−1)

Consider the reaction:

What sort of reaction is it?

  1. A
    Nucleophilic addition - elimination reaction
  2. B
    Electrophilic addition - elimination reaction
  3. C
    Free radical addition - elimination reaction
  4. D
    Electrophilic substitution elimination reaction

Solution & Step-by-step Explanation

The reaction of an aldehyde with hydrazine () proceeds in two steps:Nucleophilic Addition: The lone pair on the Nitrogen of hydrazine attacks the electrophilic carbonyl carbon.Elimination: A molecule of water is eliminated to form the hydrazone.This is a characteristic nucleophilic addition-elimination reaction of carbonyl compounds.

Practice this question

Try it yourself before checking the explanation above.

Consider the reaction:

What sort of reaction is it?
A
Nucleophilic addition - elimination reaction
B
Electrophilic addition - elimination reaction
C
Free radical addition - elimination reaction
D
Electrophilic substitution elimination reaction

Share This Question

Organic ChemistryAldehydes and Ketones

Related Questions

mediumMCQ

Which of the following statements are true?A. Unlike Ga that has a very high melting point, Cs has a very low melting point.B. On Pauling scale, the electronegativity values of N and Cl are not the same.C. Ar, K^+, Cl^-, Ca^2+ , and S^2- are all isoelectronic species.D. The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is Si > Al > Mg > Na.E. The atomic radius of Cs is greater than that of Li and Rb.Choose the correct answer from the options given below:

mediumMCQ

Match List I with List IIList I (Ion)A. Co^2+ B. Mg^2+ C. Pb^2+ D. Al^3+ List II (Group Number in Cation Analysis)I. Group-III. Group-IIIIII. Group-IVIV. Group-VIChoose the correct answer from the options given below:

hardMCQ

Predict the major product 'P' in the following sequence of reactions:

hardMCQ

Which of the following are paramagnetic?A. [NiCl_4]^2- B. Ni(CO)_4 C. [Ni(CN)_4]^2- D. [Ni(H_2O)_6]^2+ E. Ni(PPh_3)_4 Choose the correct answer from the options given below:

mediumMCQ

Given below are two statements:Statement I: Like nitrogen that can form ammonia, arsenic can form arsine.Statement II: Antimony cannot form antimony pentoxide.In the light of the above statements, choose the most appropriate answer from the options given below:

mediumMCQ

Which among the following electronic configurations belong to main group elements? A. [Ne] 3s^1 B. [Ar] 3d^3 4s^2 C. [Kr] 4d^10 5s^2 5p^5 D. [Ar] 3d^10 4s^1 E. [Rn] 5f^0 6d^2 7s^2

Ready for a Full Test?

Practice with timed mock tests and track your performance across Chemistry.

Browse TestsLeaderboard

Discussion