Elimination Reactions of Alkyl Halides

Q.

Which of the following hydrocarbons can decolorize the alkaline potassium permanganate solution?

1. ${\mathrm{C}}_2{\mathrm{H}}_6$

2. ${\mathrm{C}}_3{\mathrm{H}}_8$

3. ${\mathrm{C}}_5{\mathrm{H}}_{12}$

4. ${\mathrm{C}}_3{\mathrm{H}}_6$

Q.

n-Propyl bromide reacts with ethanolic KOH to form:

1. Propane

2. Propene

3. Propyne

4. Propyl alcohol

Q. 10. Balance the chemical reaction- Al + NO3- --> Al(OH)4- +NH3, In Basic medium.

Q.

Iodoethane reacts with sodium in the presence of dry ether. The product is

1. Propane

2. Pentane

3. Butane

4. Butene

Q. Match the reaction given in Column I with the names given in Column II.

1. A-iii, B-iv, C-i, D-ii
2. A-ii, B-i, C-iii, D-iv
3. A-iii, B-ii, C-i, D-iv
4. A-iii, B-i, C-ii, D-iv

Q.

Which has zero dipole moment

1. cis-2-butene

2. trans-2-butene

3. 1-butene

4. 2-methyl-1-propene

Q. how to determine stability of a organic compound

Q. What happens when ammonium bromide reacts with ammonia

Q.

The conjugate base of NH₃ is

1. NH₂^-

2. NH^2-

3. NH

4. NH₄⁺

Q. 12. In the reaction of p-chlotoulene with KNH2 in liquid NH3 the product obtained are O-Toluidine&p-Tolulidine m-Toluidine& p-Tolulidine P-Tolulidine &p-choroaniline p-choroaniline & m-Toluidine

Q. Difference between allylic and benzylic

Q. 85.Among the following which one is most reactive towards alcoholic KOHand with explanation a. CH2=CHBr b.CH3COCH2CH2Br c.CH3CH2Br d.CH3CH2CH2Br

Q. Explain the stability order of conjugated isolated and cumulated diene

Q. 1, 2-Dibromopropane on treatment with X moles of $NaN{H}_2$ followed by treatment with $C_2{H}_{5}Br$ gives a pentyne. The value of X is:

Q.

The number of products (excluding stereoisomes) formed in the given reaction are

Q. 50 1-methoxy hexene +( H2O/H+ ) Will give ?

Q. assertion:-1-ethylene cyclopen†an e \xrightarrow{H_2O/H^+} A 1-methyl cyclohex-1-ene\xrightarrow[{2)NABH_4/OH^-}]{1)Hg(OCOCH_3)_2, H_2O} B major product A and B are same reason:-both the reaction involves rearrangement of carbocation intermediate

Q. Dehalogenation of meso-2, 3-dibromo-butane results in

1. cis-2-Butene
2. trans-2-Butene
3. n-Butane
4. A mixture of cis-and trans-2-Butene

Q.

Q.

The major product formed in the following reaction is :

1. 

2. 

3. 

4. 

Q. The reaction is known as

1. Wurtz reaction
2. Fitting reaction
3. Wurtz-Fitting reaction
4. Freund reaction

Q. In which of the following cases, Hoffmann product is the major product?

1. 
2. 
3. 
4. 

Q. Which of the following, upon treatment with $tert-BuONa$ followed by the addition of bromine water, fails to decolourize the colour of bromine?

1. 
2. 
3. 
4. 

Q. conversion of ethane to benzene

Q. The reaction between a primary amine, chloroform and a few drops of alcoholic KOH is called:

1. Hofmann’s reaction
2. Kolbe’s reaction
3. Carbylamine reaction
4. Reimer-Tiemann reaction

Q. Convert (i)Propane to propane-2-ol (ii) 2-Methylpropene to aceton (propanol) (iii)benzoic acid to benzene

Q. Arrange the following in the decreasing order of their $E_2$ reaction tendencies:

1. X>Y>Z
2. X>Z>Y
3. Y>Z>X
4. Z>Y>X

Q. Calculate the maximum mass (in g) of $AgBr$ precipitate that will be formed when 0.2 mol of the starting material is taken in the above reaction? (Molar mass of $AgBr$=188 g/mol)

Q.

$(C{H}_3{)}_{3}CCl\stackrel{NaCN}{\to }A\stackrel{dil.H_{2}S{O}_4}{\to }B$. Compund B is

1. $(C{H}_3{)}_{3}CCOOH$

2. $(C{H}_3{)}_{3}COH$

3. $\left(C{H}_3{)}_{3}COC\right(C{H}_3{)}_3$

4. All the three

Q. can α elimination produce cyclic compounds?