Order of Preference of Functional Groups

Q.

The IUPAC name of the compound having the formula $CH\equiv C-CH=C{H}_2$ is

1. 1-butyn-3-ene

2. 1-butene-3-yne

3. 3-butene-1-yne

4. but-1-yne-3-ene

Q.

Write the structures of the following compounds.

(i) α-Methoxypropionaldehyde

(ii) 3-Hydroxybutanal

(iii) 2-Hydroxycyclopentane carbaldehyde

(iv) 4-Oxopentanal

(v) Di-sec-butyl ketone

(vi) 4-Fluoroacetophenone

Q.

Write the structures of the following compounds.

2-methyl propane.

Q.

Write the structures of the following compounds.

Prop-1-yne

Q.

Write the structures of the following compounds.

2-methyl prop-1-ene.

Q. Which of the following compounds are named correctly?

1. 4-Chloro-2-(1-hydroxyethyl)pent-1-en-1-one
2. 
   4-ketohex-2, 4-diol
3. 1-(2-Bromocyclopent-4-enyl)ethanone
4. 2-Bromo-5-hydroxycyclopent-3-ene-1-carbonitrile

Q. The IUPAC name of isobutylamine is

1. isopropyl methyl amine
2. isopropyl methanamine
3. 2-methylpropan-1-amine
4. 2-methylpropan-3-amine

Q.

(1) $-C\equiv N$ , (2) $-CON{H}_2$ , (3) $-\stackrel{O}{\stackrel{||}{C}}-$, (4)$-CHO$
The decreasing order of priority for the given functional groups (for IUPAC nomenclature) is:

1. 1 > 2 > 4 > 3

2. 1 > 2 > 3 > 4

3. 3 > 4 > 1 > 2

4. 2 > 1 > 4 > 3

Q.

Draw the structures of the following compounds.

(i) 3-Methylbutanal (ii) p-Nitropropiophenone

(iii) p-Methylbenzaldehyde (iv) 4-Methylpent-3-en-2-one

(v) 4-Chloropentan-2-one (vi) 3-Bromo-4-phenylpentanoic acid

(vii) p, p’-Dihydroxybenzophenone (viii) Hex-2-en-4-ynoic acid

Q. The decreasing order of priority for the following functional groups is
I. -COOH
II. $-S{O}_{3}H$
III. -COOR
IV. -COCl

1. (I) > (II) > (III) > (IV)
2. (II) > (I) > (III) > (IV)
3. (IV) > (III) > (I) > (II)
4. (IV) > (III) > (II) > (I)

Q. The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is
[2008]

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

Q.

STATEMENT-1 : Adenine pairs with thymine but not with cytosine.
STATEMENT-2 : With cytosine no hydrogen bonds are possible for adenine.

1. STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is a correct explanation for STATEMENT-1
2. STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1
3. STATEMENT-1 is True, STATEMENT-2 is False
4. STATEMENT-1 is False, STATEMENT-2 is True

Q. Which of the following analogies is correct?
$\text{Choloform}:\text{Trichloromethane}::\text{Ethylene dichloride}:$

1. $\text{Dichloromethane}$
2. $\text{1, 2-Dichloroethene}$
3. $\text{1, 1-Dichloroethane}$
4. $\text{1, 2-Dichloroethane}$

Q.

The IUPAC name for

1. Phenylautic acid

2. Benzyl formic acid

3. both a and b are correct

4. 2 - Phenylethanoic acid

Q.

Which nomenclature is not according to IUPAC system?

1. $\underset{1-bromoprop-2-ene}{Br-C{H}_2-CH=C{H}_2}$

2. 

3. 

4. 

Q. Which among th the following is the weakest acid?

1. $H_{2}O$
2. $C{H}_{3}COOH$
3. $C_6{H}_{5}OH$
4. $C_2{H}_2$

Q. Arrange the following in correct order of acidic strength.

1. IV > II > I > III
2. IV > II > III > I
3. III > I > IV > II
4. III > I > II > IV

Q. 28. Compare the acidity of: (1-Carbonitrile-4-hydroxy-2, 6dinitrobenzene) and (3, 4, 5-trinitrophenol).

Q. What is the IUPAC name of $C{l}_{2}CHC{H}_{2}OH$?

1. 2, 2-Dichloro ethanol
2. 2, 2-Bichloro ethanol
3. 2, 2-Dualchlorine ethanol
4. 2, 2-Chloro Chloro ethanol

Q. Which of the following monomers are involved in the production of polyamides?

1. Diamines and diesters.
2. Dicarboxylic acids and diamines
3. Diamines and dialcohols
4. Dicarboxylic acids and dialcohols

Q.

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

1. $-COOH$ > $-S{O}_{3}H$ > $-CON{H}_2$ > $-CHO$

2. $-S{O}_{3}H$ > $-COOH$ > $-CON{H}_2$ > $-CHO$

3. $-CHO$ > $-COOH$ > $-S{O}_{3}H$ > $-CON{H}_2$

4. $-CON{H}_2$ > $-CHO$ > $-S{O}_{3}H$ > $-COOH$

Q. The decreasing order of priority for the following functional groups is
I. $-C\equiv N$
II. $-CON{H}_2$
III.
IV. $-N{H}_2$

1. (I) > (II) > (IV) > (III)
2. (I) > (II) > (III) > (IV)
3. (III) > (IV) > (I) > (II)
4. (II) > (I) > (IV) > (III)

Q. What should be IUPAC nomenclature of the given coordination compound- [Co(NH3)2(en)(CO3)]Cl. As this compound have bidentate ligand so what should be its coordination number?

Q. The decreasing order of priority for the following functional groups is
I. $-C\equiv N$
II. $-CON{H}_2$
III.
IV. $-N{H}_2$

1. (II) > (I) > (IV) > (III)
2. (III) > (IV) > (I) > (II)
3. (I) > (II) > (IV) > (III)
4. (I) > (II) > (III) > (IV)

Q. The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is
[2008]

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

Q. Give the structures and IUPAC names of monohydric phenols of molecular formula, $C_7{H}_{8}O.$

Q. Explain why the given names in the following are wrong. Give the correct name in each case:
3-propyl-4-methylbutan-1-oic acid

Q. The decreasing order of priority for the following functional groups is
I. $-C\equiv N$
II. $-CON{H}_2$
III.
IV. $-N{H}_2$

1. (II) > (I) > (IV) > (III)
2. (III) > (IV) > (I) > (II)
3. (I) > (II) > (IV) > (III)
4. (I) > (II) > (III) > (IV)

Q. Cresols are

1. Hydroxytoluenes
2. Dihydricphenols
3. Trihydricphenols
4. Trihydricalcohols

Q.

Which of the following groups is/are always taken as a substituent in IUPAC nomenclature of organic compounds?

1. $-N{H}_2$

2. $\text{-R or alkyl group}$

3. $(-\stackrel{O}{\stackrel{||}{C}}-O-\stackrel{O}{\stackrel{||}{C}}-)$

4. $-N{O}_2$