Organic Chemistry Multiple Choice Questions and Answers – Alkadienes

Questions
1 Identify the incorrect statement regarding alkadiene.
A These are acyclic acids
B These are unsaturated hydrocarbons
C These compounds have only one C=C bonds
D These compounds have the general formula CnH2n-2

Answer: These compounds have only one C=C bonds
2 Alkadienes are classified into how many types?
A 1
B 2
C 3
D 4

Answer: 3
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3 Identify the incorrect statement regarding conjugated double bonds in alkadiene.
A 1,3 alkadienes have conjugated double bond
B Compounds with a double bond exhibit this type of bond
C 1,3 pentadiene is an example for this bond
D The conjugated dienes have properties similar to that of alkenes

Answer: Compounds with a double bond exhibit this type of bond
4 Identify the one which is the perfect example for Isolated double bond?
A 1,4 pentadiene
B 1,2 pentadiene
C 1,3 pentadiene
D 1,5 butadiene

Answer: 1,4 pentadiene
5 Identify the incorrect statement regarding alkadienes.
A Dienes show cis-trans isomerism
B Conjugated dienes have better stability compared to other dienes
C Dienophile supports alkadienes
D Alkadienes also undergo hydrobromination

Answer: Dienophile supports alkadienes
6 Conjugated diene reacts with which among the following to form a cyclohexene?
A Phenol
B Dienophile
C Hexane
D Tribromo phenol

Answer: Dienophile
7 Which among the following dienes undergo addition with the help of radical-chain mechanism?
A Cumulated dienes
B Isolated dienes
C Simple dienes
D Conjugated dienes

Answer: Conjugated dienes
8 Identify the statement which is related to Diels-Alder reaction?
A It is very stereospecific
B Molecular distortion takes place
C Cyclic dienes react very slow than the linear chain dienes
D Addition of maleic anhydride to cyclopentadiene causes diene and dienophile to produce different products

Answer: Cyclic dienes react very slow than the linear chain dienes
9 A molecule in which more than one single bond separates two double bonds are called as ____________
A Coordinate bond
B Isolated double bond
C Cumulative double bond
D Conjugated double bond

Answer: Isolated double bond
10 Isolated dienes are similar in property to ______________
A Monoolefins
B Diolefins
C Triolefins
D Tetraolefins

Answer: Monoolefins

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