Isomerisation of Alkanes

Q.

Why does furan undergo a Diels-Alder reaction?

Q. $\text{Cyclopentane}\underset{h\nu }{\overset{C{l}_2\text{(excess)}}{\to }}$
How many dichloro products (including stereoisomers) are possible in the given reaction?

1. $7$
2. $5$
3. $10$
4. $3$

Q. Metamers of ethyl propionate are:

1. $C_4{H}_{9}COOH\text{and}HCOO{C}_4{H}_9$
2. $C_4{H}_{9}COOH\text{and}C{H}_{3}COO{C}_3{H}_7$
3. $C{H}_{3}COOC{H}_3\text{and}C{H}_{3}COO{C}_3{H}_7$
4. $C{H}_{3}COO{C}_3{H}_7\text{and}{C}_3{H}_{7}COOC{H}_3$

Q. why the boiling point of hydrides of carbon family increases

Q. The chlorination of alkane involves

1. 
2. 
3. 
4. 

Q. Normal butane convert into isobutane by

1. $LiAl{H}_4$
2. $AlC{l}_3$
3. $NaB{H}_4$
4. $Zn/HCl$

Q. 1, 3-butadiene reacts with ethylene to form

1. Benzene
2. Cyclohexane
3. Cyclohexene
4. 2, 3 dimethyl butane

Q. How do the large surface area of pentane leads to its high boiling point then iso pentane? ?

Q.

CH₃OCH₃ is an example of:

1. Alcohol

2. Ketone

3. Aldehyde

4. Ether

Q. Name the process through which following conversion takes place:$\text{n-butane}\underset{△}{\overset{\text{Anhydrous}AlC{l}_3/HCl\left(g\right)}{\to }}\text{iso-butane}$

1. Isomerisation
2. Aromatization
3. Reaction with Steam
4. Pyrolysis

Q. How many dichloro products (including stereoisomers) are possible in the given reaction?

Q. Find correct option regarding physical property of cis/trans isomer :

1. trans isomer has the higher melting point
2. cis isomer has higher boiling point
3. both (a) and (b)
4. none of the above

Q. For the given reaction:

$\text{n-hexane}\stackrel{\left(A\right)}{\to }\text{2-methylpentane}+\text{3-methylpentane}$

Choose the correct statement:

1. (A) is anhydrous $AlC{l}_3/HCl$ and the reaction is pyrolysis reaction.
2. (A) is $KMn{O}_4$ and the reaction is controlled oxidation reaction.
3. (A) is anhydrous $AlC{l}_3/HCl$ and the reaction is isomerization reaction.
4. (A) is $M{o}_2{O}_3$ and the reaction is controlled oxidation reaction.

Q. 1, 3-butadiene reacts with ethylene to form

1. Benzene
2. Cyclohexane
3. Cyclohexene
4. 2, 3 dimethyl butane

Q. $\text{Cyclopentane}\underset{h\nu }{\overset{C{l}_2\text{(excess)}}{\to }}$
How many dichloro products (including stereoisomers) are possible in the given reaction?

1. $7$
2. $5$
3. $10$
4. $3$

Q. In Wurtz reaction alkyl halide react with:

1. Sodium in ether
2. Sodium only
3. Sodium in dry ether
4. Alkyl halide in ether

Q. $C{H}_3(C{H}_2{)}_{4}C{H}_3\stackrel{Anhy.AlC{l}_3/HCl}{\to }C{H}_3-CH-(C{H}_2{)}_2-C{H}_3+C{H}_{3}C{H}_2-CH-C{H}_2-C{H}_3$

1. Aromatisation
2. Isomerisation
3. Pyrolysis
4. Oxidation

Q. First, you name both the compounds. Yes, both of them have the same name. Yet, are they really the same structure, or they are somehow different? Careful inspection should convince you that they are indeed different. Now, how their physical and chemical properties differ? Generally,
i) Cis-isomer has more dipole moment than trans-isomer.
ii) Cis is less stable than trans.
iii) The boiling points of cis isomers are more than those of trans isomers (remember boiling points are directly related to polarity which is determined by dipole moment).
iv) Chemical reactivities of cis and trans also differ from each other.
Which of the following statements best explain(s) the relationship between two isomers of $C{H}_3-CH=CH-C{H}_3$?

1. They are diastereomers.
2. They are enantiomers.
3. They are geometrical isomers.
4. Their melting points are same.

Q.

$C_2{H}_{5}Cl+Na\stackrel{Dryether}{\to }X+NaCl$ Number of possible structural and stereo isomers for mono chloro derivatives of 'X' are

1. 2

2. 3

3. 4

4. 5

Q. Which of the followings is correct nonemclature for the given compound?

1. Syn-Ethyl propyl oxime
2. Anti- Ethyl propyl oxime
3. Syn- Propyl ethyl oxime
4. None of the above

Q. Which of the following reagent is used in the isomerisation of alkanes?

1. $LiAl{H}_4$
2. Anhy. $AlC{l}_3/HCl$ gas
3. $Cu/{300}^{o}C$
4. $V_2{O}_5/{500}^{o}C$

Q. The major products obtained when a mixture of cyclohexane and cyclopentane is heated to ${300}^o$C in the presence of $Pt$ are:

1. cyclohexane and cyclopentene
2. benzene and cyclopentane
3. benzene and n-pentane
4. cyclohexadiene and cyclopentadiene

Q. Name the process through which following conversion takes place:$\text{n-butane}\underset{△}{\overset{\text{Anhydrous}AlC{l}_3/HCl\left(g\right)}{\to }}\text{iso-butane}$

1. Isomerisation
2. Aromatization
3. Pyrolysis
4. Reaction with Steam

Q. why the boiling point of ethyl bromide is higher than that of ethyl chloride?

Q. Name the process through which following conversion takes place:$\text{n-butane}\underset{△}{\overset{\text{Anhydrous}AlC{l}_3/HCl\left(g\right)}{\to }}\text{iso-butane}$

1. Isomerisation
2. Aromatization
3. Pyrolysis
4. Reaction with Steam

Q. Identify the compounds from the following which form primary amines under suitable reduction conditions.
1. $C_2{H}_{5}NC$
2. $C_2{H}_6$
3. $C_2{H}_{5}CON{H}_2$
4. $C_6{H}_{5}N{O}_2$

1. $1,4$
2. $1,3,4$
3. $3,4$
4. $2,3,4$

Q. When n-butane is heated in the presence of $AlC{l}_3/HCl$ it will be converted into :

1. butene
2. isobutane
3. ethane
4. propane

Q. Give the structures of (A), (B), and (C) in the following reaction:
$C{H}_{3}C{H}_{2}I\stackrel{NaCN}{\to }\left(A\right)\underset{PartialHydrolysis}{\stackrel{\stackrel{⊝}{O}H}{\to }}\left(B\right)\stackrel{NaOH+B{r}_2}{\to }\left(C\right)$

Q. Which one of these is not compatible with arenes?

1. Greater stability
2. Delocalisation of $\pi$ - electons
3. Electrophilic additions
4. Resonance

Q. Which of the following has least boiling point?

1. n – Hexane
2. n – Pentane
3. 2 – Methyl butane
4. 2, 2 – Dimethyl propane