Nomenclature of Unsaturated Hydrocarbons

Q.

Name the following compounds according to IUPAC system of nomenclature :

$C{H}_{3}CH\left(C{H}_3\right)C{H}_{2}C{H}_{2}CHO$

$C{H}_{3}C{H}_{2}COCH\left(C_2{H}_5\right)C{H}_{2}C{H}_{2}Cl$

$C{H}_{3}CH=CHCHO$

$C{H}_{3}COC{H}_{2}COC{H}_3$

$C{H}_{3}CH\left(C{H}_3\right)C{H}_{2}C(C{H}_3{)}_{2}COC{H}_3$

$(C{H}_3{)}_{3}CC{H}_{2}COOH$

$OHC{C}_6{H}_{4}CHO-p$

Q. The correct decreasing order of priority for the functional groups of organic compound in the IUPAC system nomenclature is:

1. -CHO, - COOH, -$S{O}_{3}H-CON{H}_2$
2. $-CON{H}_2$, - CHO, -$S{O}_{3}H$, - COOH
3. -COOH, -$S{O}_{3}H,-CON{H}_2$, -CHO
4. $-S{O}_{3}H,-COOH,-CON{H}_2$, -CHO

Q.

The IUPAC name of ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{NH}-{\mathrm{CH}}_3$.

Q.

What Is The IUPAC Name Of ${\mathrm{CH}}_3{\mathrm{CH}}_2-\mathrm{O}-{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$?

Q. The correct structure of 2-Ethyl-3-methylhexa-1, 4-diene.

1. 
2. 
3. 
4. 

Q.

What is the IUPAC name of ${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CHC}\left(\mathrm{Br}\right){\left({\mathrm{CH}}_3\right)}_2$?

Q. The correct IUPAC name of 2-Ethylpent-3-yne is

1. 3-Methylhexyne-4
2. 4-Ethylpentyne-2
3. 4-Methylhex-2-yne
4. None of these

Q.

Which of the following is most reactive towards HCN?

1. Acetone

2. Formaldehyde

3. Acetaldehyde

4. Diethyl ketone

Q. The correct IUPAC name of the compound is

1. $\text{4-Bromo-1-chloro-2-fluoroiodomethylbutene}$
2. $\text{4-Bromo-2-chloromethyl-1-fluoro-1-iodobut-l-ene}$
3. $\text{2-(2-Bromoethyl)-3-chloro-l-fluoro-1-iodoprop-1-ene}$
4. $\text{1-Bromo-3-chloromethyl-4-fluoro-4-iodobut-1-ene}$

Q. If both double bond and triple bond are present in the molecule and if there is a choice in numbering, then triple bond is given preference.

1. True
2. False

Q. What is the correct IUPAC name of the following compound?

1. 6-(2-propenyl)deca-1, 7-diene
2. 5-(2-propenyl)deca-3, 9-diene
3. 4-(1-propenyl)nona-1, 8-diene
4. 4-(1-butenyl)nona-1, 8-diene

Q. The correct structure of 3-Methylpenta-1, 3-diene is

1. $C{H}_2=CH(C{H}_2{)}_{2}C{H}_3$
2. $C{H}_2=CHCH\left(C{H}_3\right)C{H}_{2}C{H}_3$
3. $C{H}_{3}CH=C\left(C{H}_3\right)CH=C{H}_2$
4. $C{H}_3=C=C(C{H}_3{)}_2$

Q. The IUPAC name of the compound is :

1. 4-Ethyl-5, 6, 7, 9-tetramethyldeca-2, 9-diene
2. (a) and (c) above.
3. 7-Ethyl-2, 4, 5, 6-tetramethyldeca-1, 8-diene
4. 7-Ethyl-2, 4, 5, 6-tetramethyldeca-1, 7-diene

Q.

The primary cause of geometrical isomerism is due to

1. The presence of double bond

2. The presene of pi bond

3. Restricted rotation

4. Planar structure

Q. The correct IUPAC name of the following structure is :

1. iso-pentylene
2. 2-butylprop-1-ene
3. 2-methylhex-2-ene
4. 2-methylhex-1-ene

Q.

Degree of unsaturation in is

1. 6
2. 10
3. 8
4. 7

Q. Which among the following is the correct IUPAC name of isoamylene?
$C{H}_3-\stackrel{\stackrel{C{H}_3}{|}}{CH}-CH=C{H}_2$

1. 1-Pentene
2. 2-Methyl-2-butene
3. 3-Methylbut-1-ene
4. 2-Methylbut-1-ene

Q. The correct IUPAC name of the following compound is :

1. 3-methyl-hex-4-yne
2. 4-methylhex-2-yne
3. 2-ethylpent-3-yne
4. 3-ethylpent-2-yne

Q. The IUPAC name of the given structure is :$\left(C{H}_3\right)CCC\left(C{H}_3\right)CH\left(C{H}_3\right)$

1. 3-Methyl-4-hexynene-2
2. 3-Methylhex-2-ene-4-yne
3. 4-Methyl-4-hexenyne-4
4. All of the above.

Q. Write the IUPAC name of the given compound:

$\begin{array}{ccccccccc}C{H}_3& -& NH& -& C{H}_2& -& CH& -& C{H}_3\\ & & & & & & |& & \\ & & & & & & C{H}_3& & \end{array}$

Q.

Match the structures of the compounds given in Column I with the name of the compounds given in Column II.

Q. Suffix used for double and triple bond respectively while naming the unsaturated organic compound ?

1. ene, yne
2. en, yn
3. enyl, ynyl
4. yne, ene

Q. $\begin{array}{cc}\text{Column - I}& \text{Column - II}\\ \text{(a) 3, 3, 4, 4-tetramethyl-1-pentyne}& \text{(p) Has only three collinear carbons}\\ \text{(b) 2-butyne}& \text{(q) Has four collinear carbons}\\ \text{(c) 1-butyne}& \text{(r) Substitution of H by Cl gives single product}\\ \text{(d) 2, 2, 5, 5-tetramethyl-3-hexyne}& \text{(s) Substitution of H by Cl gives three different}\\ & \text{product (excluding stereoisomers)}\end{array}$

1. $a\to p,s;b\to q,r;c\to p,s;d\to q,r$
2. $a\to p,r;b\to q,r;c\to p,s;d\to q,s$
3. $a\to q,s;b\to p,r;c\to s;d\to q,r$
4. $a\to q,s;b\to q,r;c\to p,s;d\to q,r$

Q.
IUPAC name of the compound is:

1. Hex-1-ene-5-yne
2. Hex-5-yne-1-ene
3. Hex-1-en-5-yne
4. None of the above

Q. The IUPAC name of the compound $HC\equiv CH-CH=C{H}_2$ is But-3-en-1-yne.

1. True
2. False

Q. Write the IUPAC name of the following compound :
$C{H}_3-\underset{Br}{\underset{|}{CH}}-C{H}_2-\underset{Cl}{\underset{|}{CH}}-C{H}_3$

Q. Which of the following structures can be classified as isolated polyenes ?

1. 
2. 
3. 
4. 

Q. The correct IUPAC name of the compound :

1. 4-methyl-5, 7-diethyloct-2-ene
2. 2, 4-ethyl-5-methyl oct-2-ene
3. 5-Ethyl-3, 6-dimethylnon-3-ene
4. 5-ethyl-4, 7-dimethyl non-3-ene

Q. What is the correct IUPAC name of the following compound?

1. 2, 4-diethyl-3-methylidenepenta-1, 4-diene
2. 2, 4-diethyl-3-methylidenepenta-1, 4-diene
3. 2, 4-diethyl-3-methylidenepent-1, 4-diene
4. 2, 4-dimethyl-3-methylidenepenta-1, 4-diene

Q. What is the correct IUPAC name of the following compound given below?

1. Octa-1, 4, 8-triene
2. Oct-1, 4, 8-triyne
3. Nona-1, 4, 7-triyne
4. Octa-1, 4, 7-triyne