Introduction to E2 Mechanism

Q.

The reaction of sodium ethoxide with ethyl iodide to form diethyl ether is termed

1. Electrophilic substitution

2. Nucleophilic substitution

3. Electrophilic addition

4. Nucleophilic addition

Q. 18. What is Darzen reaction

Q.

The negative part of the addendum (the molecule to be added) adds on the carbon atom of the double bond containing the least number of hydrogen atoms. This rule is known as?

Q.

What happens when ${\mathrm{CH}}_3\mathrm{Br}$ is treated with $\mathrm{KCN}$?

Q. A dihaloalkane on alkaline hydrolysis produces a ketone with formulo C3H6O. The dihaloalkane can be what??

Q.

Which of the following Alkyl Halide will undergo ${\mathrm{E}}_2$ elimination?

1. 

2. 

3. 

4. 

Q. 6. What are Lossen rearrangement & Curtius reaction & their mechanism?

Q. Which of the following compound is not obtained when the products obtained from the electrolysis of brine are mixed? A)nacl B)H2 c)naocl d)cl2

Q.
Which statements is true for the above reaction?

1. Retention of configuration
2. Inversion of configuration
3. Inversion and Retention both
4. None

Q.

Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of

1. Addition Reaction

2. Substitution Reaction

3. Displacement Reaction

4. Oxidation Reaction

Q. Product "A" in the above chemical reaction is

1. 
2. 
3. 
4. 

Q. 32.What happens when 2-methylcyclohexanone reacts with CH3I in presence of LDA/THF?{with mechanism}.

Q.

To an aqueous solution of $AgN{o}_3$ some NaOH (aq) is added, till a brown ppt. is obtained. To this $H_2{O}_2$ is added dropwise. The ppt. turns black with the evolution of $O_2$. The black ppt. is

1. Ag₂O­₂

2. AgOH

3. None of these

4. Ag₂O

Q. what is the suffix used for complex [Cr(NO2)(NH3)5][ZnCl4]

Q.

State the conditions required for the Preparation of ethyne from ethylene dibromide

Q.

When phenyl magnesium bromide is reacted with t-Butyl alcohol it gives

1. $\mathrm{Ph}-\mathrm{H}$

2. $\mathrm{Ph}-\mathrm{OH}$

3. $\mathrm{Ph}-\mathrm{O}-\mathrm{C}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

4. $\mathrm{Ph}-\mathrm{O}-\mathrm{C}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

Q. Give the correct sequence of reagents used for the following conversion.

C—OCH, o C—H 

Q.

In which of the following reactions diastereomer isomer will formed?

1. 

2. 

3. 

4. 

Q.

When 2-chloro-2-methylpentane is heated with $C{N}^{-}$, the majority product is:

1. A nitrile via substitution

2. An alkene via elimination

3. Neither a nor b

4. Both a and b in nearly equal proportions

Q. Predict the product in the reaction given below.

1. 
2. 
3. 
4. 

Q.

Explain anti-Markovnikovs rule.

Q. The following reaction has been proposed for the reaction of NO with Br2 to form NOBr

Q. $\left(I\right)RCOCl\underset{Pd-BaS{O}_4}{\overset{H_2}{\to }}R-CHO$

$\left(II\right)RCN\underset{H_{2}O}{\overset{SnC{l}_2/HCl}{\to }}R-CHO$

Reaction (I) and (II) respectively are:

1. Frankland's reaction and Corey-House Synthesis
2. Rosenmund's reaction and Stephen's reaction
3. Wurtz's reaction and Stephen's reaction
4. Reimer-Tiemann's reaction and Rosenmund's reaction

Q.
Product (B) of the above reaction is:

1. 
2. 
3. 
4. 

Q. 75 What is the normality of 0.3 M H3PO4, When it undergoes the reaction as: H3PO4+2OH- reacts to HPO32-+2H2O

Q. The reaction of the bromo compound shown below with sodium ethoxide gives predominantly:

1. 
2. 
3. 
4. 

Q. Number of methyl substitutions takes place in the ring when aniline is reacted with $C{H}_{3}Cl$ in the presence of $AlC{l}_3$?

1. $0$
2. $1$
3. $2$
4. $3$

Q. An alkyl chloride produces a single alkene on reaction with sodium ethoxide and ethanol. The alkene further undergoes hydrogenation to yield 2- methyl butane. Identify the alkyl chloride from amongst the following.

1. $ClC{H}_{2}CH\left(C{H}_3\right)C{H}_3$
2. $ClC{H}_{2}C{H}_{2}C{H}_{2}C{H}_3$
3. $C{H}_{3}C\left(Cl\right)\left(C{H}_3\right)C{H}_{2}C{H}_3$
4. $ClC{H}_{2}CH\left(C{H}_3\right)C{H}_{2}C{H}_3$

Q.

What is the major product formed by $HI$ on reaction with $2,2\text{dimethyl but-1-ene}$?

1. 
2. 
3. 
4. 

Q. 42. Give the mechanism of production of aldehyde by etard reaction.