Predict the major product in the following reaction:
p-Hydroxyazobenzene
- In the reaction shown, the diazonium ion (C₆H₅N₂⁺Cl⁻) reacts with phenol (C₆H₅OH).
- This reaction is an azo coupling reaction. In this type of reaction, the diazonium ion reacts with the phenolic group (OH) in an electrophilic aromatic substitution to form p-hydroxyazobenzene as the major product.
- The p-hydroxyazobenzene forms because the hydroxyl group on the phenol is an electron-donating group, favoring the coupling at the para position.
- Therefore, the major product is (b) p-Hydroxyazobenzene.
The correct increasing order of basic strength of amine is:
(A) C₆H₅NH₂ < NH₃ < C₆H₅CH₂NH₂ < C₂H₅NH₂ < (C₂H₅)₂NH
(B) NH₃ < C₆H₅NH₂ < C₆H₅CH₂NH₂ < C₂H₅NH₂ < (C₂H₅)₂NH
(C) C₆H₅CH₂NH₂ < C₆H₅NH₂ < NH₃ < C₂H₅NH₂ < (C₂H₅)₂NH
(D) C₂H₅NH₂ < (C₂H₅)₂NH < C₆H₅NH₂ < NH₃
(E) NH₃ < C₂H₅NH₂ < C₆H₅CH₂NH₂ < (C₂H₅)₂NH < C₆H₅NH₂
Choose the correct answer from the options given below:
In which of the following molecules carbon atom marked with asterisk (*) is a stereocentre or chiral centre?
Match List-I with List-II:
| List-I | List-II |
|---|---|
| (A) Urease | (I) Maltose |
| (B) Maltase | (II) Glucose and fructose |
| (C) Invertase | (III) NH₃ and CO₂ |
| (D) Diastase | (IV) Glucose |
Choose the correct answer from the options given below:
Phenol is manufactured from hydrocarbon, Cumene. Cumene is chemically:
t99.9% with respect to t90% for a first-order reaction is: