Nomenclature of Unsaturated Hydrocarbons

Q.

Give examples for allylic halides.

Q. Which of the following is the correct IUPAC name? (i) 3-Ethyl-4, 4-dimethylheptane (ii) 4, 4-Dimethyl-3-ethylheptane (iii) 5-Ethyl-4, 4-dimethylheptane (iv) 4, 4-Bis(methyl)-3-ethylheptane (Explain between option 1 and 2)

Q.

Which one of the following IUPAC name is incorrect?

1. Pent - 3 - ene

2. 3-methyl pentan- 2-ol

3. Ethanoic acid

4. Ethanal

Q. Q 5/15 Which of the following statements are correct?a. Bond order of NO is 2.5 b. Bond order of NO+ is 3.0 c. Bond order of 02 is 1.5 d. Bond order of CO is 3.0 1.(a), (b) & (c) 2.(b), (c) & (d) 3.(b) & (d) 4.(a), (b) & (d)

Q. Degree of unsaturation in
is

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

Q. 26.Which bond is strongest 1)1s--1s. 2)2p----2p. 3)2s---2p. 4)1s---2p

Q. which of the following is the correct order of C-C bond lengths among these compounds-----1.CH3-O-CH=CH-NO2 2.CH2=CH-CH3 3.CH2=CH-NO2 4.CH2=CH2

Q. The IUPAC name for following compound is

1. Non-4-ene-1, 8-diyne
2. Non-4-en-1, 8-diyne
3. Non-5-ene-1, 8-diyne
4. Non-5-en-1, 8-diyne

Q. Double bond and triple Bond will show metamerism?

Q. how many minimum carbons required for chain isomerism and position isomerism in alkanes alkenes and alkynes draw their structure also

Q. Which of the following represent Isolated polyenes ?
A.

B.

C.

D.

1. A, B, C
2. B, C, A
3. C, A, D
4. B, C, D

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

1. 6-propylocta-2, 4-diene-8-yne
2. 3-propylocta-4, 6-diene-1-yne
3. Propyl-3-octa-4, 6-diene-1-yne
4. 3-propylocta-4, 6-dien-1-yne

Q. 7.Why CO3 2- Considered as a non dative bond explain

Q. 14.The third member of the family of alkenynes has the molecular formula (A)C6H6 (B)C5H6 (C)C6H8 (D)C4H4

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

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

Q.

When ethylene bromide is treated with Zn we get

1. Alkane

2. Alkene

3. Alkyne

4. All

Q. Write IUPAC names of the products obtained by the ozonolysis of 3, 4 -Dimethylhept-3-ene.

Q.

Which one of the following is a nonelectrolyte?

1. glucose
2. NaCl
3. HCOONa
4. ammonium chloride

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. 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. Which of the following is an example of cumulated polyene?

1. 
2. 
3. 
4. 

Q. What is the correct IUPAC name of the following compound?
$C{H}_3-\stackrel{\stackrel{C{H}_3}{|}}{\underset{\underset{C{H}_3}{|}}{C}}-CH=C{H}_2$

1. 3, 3-Dimethylbut-1-ene
2. 1, 1, 1-Trimethylprop-2-ene
3. 3, 3, 3-Trimethylprop-1-ene
4. 2, 2-Dimethylbut-3-ene

Q. Select the structure with correct numbering in the chain :

1. 
2. 
3. 
4. All of the above.

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. 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. 50. How to compare the bond energy of the homonuclearcovalent bond and the heteronuclear bond like bond energy of O-H bond and H-H bond in H2O

Q. Why +R groups donate electron to carbon carbon double bond?

Q. Compare bond length: (A)PF bond length in PF3 and POF3 (B) SO bond length in SO2 , SO3, SO4(2-), SO3(2-) (C)O-O Bond length in O2, O3, H2O2, Na2O2 (D)N-N Bond length in N2H2 and N2F2. (E)N-N Bondl length in N2, N3(-), N2O

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. A hydrocarbon has a molecular formula $X\left(C_6{H}_6\right)$ . The only type of unsaturation that $X$ has are triple bonds. How many different $IUPAC$ names can be assigned to $X$?

1. 5
2. 3
3. 4
4. 7