Directive Influence of Substituents

Q. 27. The enthalpy of neutralisation of four acids HA, HB, HC and HD with NaOH are 13, 12, 11, 10 kcal/mol. Which salt has maximum degree of hydrolysis ? (1) 1M NaA (2) 1M NaB (3) 1M NaC (4) 1M NaD

Q. Does benzene show +R or -R effect? Explain why

Q.

During nitration of benzene, the active nitrating agent is:

1. NO₂^-

2. HNO₃

3. NO₂⁺

4. NO₃^-

Q. In oxidation of alkenes with KMnO4 hot and concentrated we get carboxylic acids why with cold KMnO4 we get 1, 2 diol In oxidation of alkynes with KMnO4 neutral and cold we get Alpha diketone while with warm or basic we get Carboxylic acids Are the above two statements correct

Q. What is carbocation? Why tertiary carbocation is most stable?

Q. What are electrophiles and nucleophiles ? Explain with examples.

Q. What is the equivalent mass of Barium Hydroxide?

Q. conversion of benzene to 3 ethyl bromo benzene

Q. Four species are given below: HCO^{3-}, H_3O^+, HSO^{4-}, HSO_3F What is the sequence of their acidic strengths

Q.

Arrange the following in the increasing order of acidity and name the property which decides this order:

(1) HCOOH, CH₃COOH, CH₂ClCOOH

(2) CH₃COOH, CH₃OH, C₆H₅OH

Q. The double bond equivalence of $D$ is :

Q.

What is meant by ortho and para hyrogen? :)