5-Bromo-3-chloro-1-ethyl-2-methylcyclohex-1-ene

4-Bromo-6-chloro-2-ethyl-1-methylcyclohex-1-ene

5-Bromo-1-chloro-3-ethyl-2-methylcyclohex-2-ene

1-Bromo-5-chloro-3-ethyl-4-methylcyclohex-3-ene

5-Ethyl-1-methyl cyclohex-2-ene

1-Methyl-5-ethyl cyclohex-2-ene

4-Ethyl 6 methyl cyclohex-1-ene

4 - Bromo - 3- iodo cyclohexa- 1, 3 - diene

1 - Bromo - 2- iodo cyclohexa- 1, 3 - diene

1 - Bromo - 2- iodo - 1, 3 -cyclohexadiene

(Z)-4, 6-Dimethyloct-4-en-3-one

(E)-4, 6-Dimethyloct-4-en-3-one

(Z)-4, 6-Dimethyloct-4-en-6-one

(E)-3, 5-Dimethyloct-4-en-6-one

MCQ Questions for Class 11 Medical Chemistry Organic Chemistry Some Basic Principles And Techniques Quiz 8

The IUPAC name of ferric ferrocyanide is:

0%
hexacyanoferrate (II)
0%
iron (II) hexacyanoferrate (III)
0%
iron (III) hexacyanoferrate (II)
0%
iron (II) hexacyanoferrate (II)

Explanation

The formula of ferric ferrocyanide is

$Fe_4[Fe(CN)_6]_3$ .

so here the molecule contains

$Fe^{+3}$ and

$[Fe(CN)_6]^{4-}$ . negative ligand has IUPAC name hexacyanoferrate (II)

$Fe^{+2}$ - ferrate(ii)

$Fe^{+3}$ -iron (iii)

$CN^{-}$ - cyano

So the IUPAC name is iron(iii )hexacyanoferrate (II)

$IUPAC$ name of the compound is:

0%
$1-$ Bromo $-2-$ chlorocyclopenta $-2,4-$ diene
0%
$1-$ Chloro $-5-$ bromocyclopenta $-1,3-$ diene
0%
$5-$ Bromo $-1-$ chlorocyclopenta $-1,3-$ diene
0%
$3-$ Bromo $-4-$ chlorocyclopenta $-1,4-$ diene

Explanation

Rules for Naming Hydrocarbons:-

Rule-I Selection of the longest carbon chain.

Rule-II Numbering the longest chain: Longest chain is numbered starting from a terminal carbon. Numbering is done is such a way that lowest possible number is given to the side chain or a functional group.

Rule-III Writing names of branched, saturated hydrocarbons, locants are written first in alphabetical order followed by name of parent chain.

Rule-IV Some common names are retained in $IUPAC$ system for unsubstituted hydrocarbon only.

(Refer to Image 1)

As according to alphabetical order $-Br$ having carbon will be given $1$ number. So,

(Refer to Image 2)

Ring is $5$ membered.

So, $1-Bromo-2-chlorocyclopenta-2,4-diene$

1008460_1072539_ans_906592a3e7be48029f3f047ee73f3dba.png

$CH_3-\overset{\,CH_3}{\overset{|}{\underset{\,C_2H_5}{\underset{|}{C}}}}-\underset{\,OH}{\underset{|}{\,CH}}-CH_3$

Write the

$IUPAC$ name of the above compound :

0%
$3-hydroxy-3,3-dimethyl-pentane$
0%
$2-hydroxy-3,4-dimethyl-pentane$
0%
$2-hydroxy-3,7-dimethyl-pentane$
0%
$2-hydroxy-3,3-dimethyl-pentane$

Explanation

Rules for Naming Hydrocarbons:-

Rule-I Selection of the longest carbon chain.

Rule-III Writing names of branched, saturated hydrocarbons, locants are written first in alphabetical order followed by name of parent chain.

Rule-IV Some common names are retained in $IUPAC$ system for unsubstituted hydrocarbon only.

(Refer to Image 1)

As $-OH$ should be given preference so,

numbering will start from right hand side to give less numbering to $C$ of $-OH$ .

(Refer to Image 2)

Longest chain is $5$ membered.

So, naming is $2-hydroxy-3,3-dimethyl-pentane$ .

1008577_1072648_ans_6983367eb6f64a6aa8b7e1e00cf518a7.png

Which is the best leaving group?

0%
${N}_{2}$
0%
${OH}^{-}$
0%
${NH}_{2}^{-}$
0%
${CH}_{3}CO{O}^{-}$

Explanation

$N_2$ is best leaving group among given. Best leaving group are self detachable.

$N_2$ is self detachable.

IUPAC name of this compound

0%
2- Methyl -1- phenylpentane
0%
2- Methyl -2- phenylpentane
0%
2- Methyl -3- phenylpentane
0%
1- Methyl -3- phenylpentane

IUPAC name of

$\overset{HOOC - CH - CHO}{\overset{|}{C}H_3}$ is:

0%
formyl ethanoic acid
0%
$2 -$ formyl propanoic acid
0%
$2-$ carboxy propanal
0%
$2-$ methyl propane

Explanation

As the strongest functional group is

$-COOH$ compared to

$-CHO$ . So,

$-COOH$ is primary functional group.

IUPAC name is: 2-formyl propanoic acid

1101623_1096710_ans_b1acab3a5c8347d58682518b53254b45.png

IUPAC name of the following compound is ?

0%
2-methylnona-2,6-dien-1-al
0%
3-methylnona-2,6-dien-1-al
0%
4,6-dimethylhepta-3,5-dien-1-al
0%
3,7-dimethylocta-2,6-dien-1-al

Explanation

$\begin{array}{l} \text { IUPAC - Longest chain }\text { with more functional group. } \\ \text { Lowest position to substituent. } \end{array}$

$\begin{array}{l} \text { 3,7-dimethylocta-2,6-dien - } 1-a l \\ \text { Correct Answer -D } \end{array}$

2007124_1094171_ans_94cea549ede042e1928692b53e72e71a.PNG

Select the molecule that has one

$pi\ bond$ ?

0%
$CH=CH$
0%
${CH}_{2} =CH-CHO$
0%
${CH}_{3}-{CH}={CH}_{2}$
0%
${CH}_{3}-{CH}={CH}-{COOH}$

Explanation

(A)

$CH_2\overset {1}{=}CH_2$

$O$

(B)

$CH_2\overset {1}{=}CH-\overset {2||}{C}-H$

(C)

$CH_3-CH\overset {1}{=}CH_2$

$O$

(D)

$CH_3-CH\overset {1}{=}CH-\overset {2||}{C}-OH$

Compound in option

$(A)$ &

$(B)$ have one

$Pi-$ bond in their structure.

Name of

$(CH_{3})_{2}HC-O-CH_{2}-CH_{2}-CH_{3}$ is:

0%
isopropyl propyl ether
0%
dipropyl ether
0%
di-isopropyl ether
0%
isopropyl propyl keton

Explanation

$CH_2-\underset{\underset{CH_3}{|}}{CH}-O-CH_2-CH_2-CH_3$

In the given compound, the groups attached to

$-O-$ group are propyl and isopropyl.

Thus, the IUPAC name of the compound will be:

Isopropyl propyl ether

The IUPAC name of the following structure

$(CH_3)C.C.C.(CH_3)CH(CH_3)$ is:

0%
$3$ - Methylhex- $4$ -yn- $2$ -ene
0%
$3$ - Methylhex- $2$ -en- $4$ -yne
0%
$4$ - Methylhex- $4$ -en- $4$ -yne
0%
All are correct

Give

$IUPAC$ names of following alkyl group.

0%
Isopentyl
0%
Tert-Pentyl
0%
Isobutyl
0%
Neohexyl

Based on "

$1993$ Recommendations"

$H_2C=CHCH_2CH_2CH_3$ is named as:

0%
$1$ -pentene
0%
pent- $1$ -ene
0%
$4-$ pentene
0%
Pent $-4-$ ene

Explanation

$\underset { 1 }{ { H }_{ 2 }C } =\underset { 2 }{ CH } \underset { 3 }{ { CH }_{ 2 } } \underset { 4 }{ { CH }_{ 2 } } \underset { 5 }{ { CH }_{ 3 } }$

$1-$ pentene position of the functional group

should be mention before the main carbon chain name.

IUPAC Name of is:

0%
3-methylcyclohexene
0%
1- methylcyclohex-2-ene
0%
6-methylcyclohexene
0%
1-methylcyclohex -5-ene

Explanation

$3-$ methylcyclohexene.

$\rightarrow$ Numbering should start at the priority functional group and the locant sum should be less.

1165593_1117068_ans_85d21c8c0dac43ad951514808086c567.png

$IUPAC$ name of the hydrocarbon

$(A)$ is:

0%
$2-$ ethyl $-5-$ methylhexane
0%
$5-$ ethyl $-2-$ methylhexane
0%
$2,5-$ dimethylheptane
0%
$5-$ ethyl $2,5-$ methylhexane

Explanation

The IUPAC name is :-

$2,5-dimethyl$

$heptane$ .
1380517_1117669_ans_3c234c920af647efa4b39ed2df41e0dc.png

IUPAC name of the formula

$CH_2(COOH)_2$ is ?

0%
butanoic acid
0%
propane -1,3-dioic acid
0%
propane -1,2-dioic acid
0%
malonic acid

IUPAC name of the compound is:

0%
Z-2-chloro-4-hydroxy-2-butene
0%
Z-4-chloro-2-butene-2-ol
0%
Z-4-chloro-3-butene-2-ol
0%
Z-4-chloro-4-butene-2-ol

Explanation

The

$IUPAC$ name of the following compound is

$Z-4-chloro-3-butene-2-ol$ .

Hence, the correct option is C.

1381116_1121866_ans_7d35e8e1769a47b089f97b21c9516467.png

A number of functional group and degree of unsaturation (respectively) in the above compounds is:

0%
$7,8$
0%
$6,8$
0%
$6,6$
0%
$5,6$

Explanation

Function Groups are:

$O$

$-\overset {||}{C}-NH-$ ,

$-\overset {||}{C}-NH_2$ ,

$-COOH$ ,

$-O-$ ,

$-NH-$ ,

$-C\equiv CH$ .

Hence, only

$6$ functional groups.

Degree of unsaturation is

$8$ (

$3$ Rings+

$3$ Double bonds+

$1$ Triple bond)

Which of the following molecules contains only

$\pi$ bond?

0%
$B_2$
0%
$C_2$
0%
$C_2H_2$
0%
Both (1) & (2)

Explanation

There can be exclusive pi bonds without existing sigma bonds. Some such molecules are

$B_2$ and

$C_2$ .

$MO$ Theory shows that there are two sets of paired electrons in a degenerate pi bonding set of orbitals.

The paired electrons belong to the pi orbitals (

$\pi$

$2px$ and

$\pi 2py$ to be precise). It is these paired electrons that are involved in bonding while the rest of the inner shell electrons aren’t.

The IUPAC name of the compound is :

0%
5, 5, -diethyl - 4 - 4 - diethyl pentane
0%
3 - Ethyl - 4 - 4 - dimethyl heptane
0%
Both
0%
None

The IUPAC name of an unsymmetrical ether with the molecular formula

$C_4H_{10}O$ is:

0%
ethoxy propane
0%
methoxy ethane
0%
ethoxy ethane
0%
methoxy propane

Explanation

$C_4H_{10}O$

$CH_3-CH_2-CH_2-O-CH_3$

Methoxy propane

The

$IUPAC$ name of the following compound is;

0%
cyclopentanedioic anhydride
0%
pentanedicarboxylic anhydride
0%
pentanedioic anhydride
0%
Dicyclopentane anhydride

The IUPAC name of the compound

$(CH_{3})_{4}C$ is -

0%
2,2-Dimethylpropane
0%
Teramethylmethane
0%
2,2,2-Trimethylethane
0%
1,1,1& trimethylethane

Correct

$IUPAC$ name of is:

0%
formyl methanoic acid
0%
$2-$ oxo $-$ ethanoic acid
0%
Both $A$ and $B$
0%
none of the above

$IUPAC$ name of the following compound is:

0%
$1-$ ethyl $-2-$ methylcyclohexane
0%
$2-$ ethyl $-1-$ methylcyclohexane
0%
$6-$ ethyl $-1-$ methylcyclohexane
0%
$1-$ ethyl $-6-$ methylcyclohexane

In the following compound, group designed as

$A,B,C$ will be numbered as:

0%
$1,2,4$
0%
$4,2,1$
0%
$5,1,2$
0%
$3,1,6$

Explanation

$A\rightarrow 5, B\rightarrow 1, C\rightarrow 2$
1383759_1131269_ans_4c2ff903604d44eab10b00a159535058.png

Di-n-butylphthalate is:

0%
plasticizer
0%
thermoplastic
0%
polymer
0%
thermosetting plastic

Explanation

Dibutyl phthalate (DBP) is an organic compound commonly used

$plasticizer$ . With the chemical formula

$C_6H_4(CO_2C_4H_9)_2$ , it is a colorless oil, although commercial samples are often yellow. Because of its low toxicity and wide liquid range, it is used as a plasticizer.

So option

$A$ is correct.

The correct IUPAC name of

$CH_{3}-CH_{2}CH(CH_{3})-CH(C_{2}H_{5})-C_{2}H_{5}$ is:

0%
3-methyl-4-ethylpentane
0%
3-methyl-4,4-diethylbutane
0%
4-ethyl 3-methylhexane
0%
3-ethyl 4-methylhexane

The IUPAC name of

$CH_{3}CH_{2}COCH_{2}CH_{3}$ is?

0%
3-pentanone
0%
2-pentanone
0%
Diethylketone
0%
all the above

Explanation

The IUPAC name of (refer to image)

This is a ketone,sosuffix would be one.

Therefore the IUPAC name would be pentan

$-3-$ one or

$3-$ petanone.

1081290_1139302_ans_90d835aaabe94d19a68abc14c0650384.PNG

Write the IUPAC names and symbols for the elements having atomic numbers.

0%
$102$
0%
$107$
0%
$114$
0%
$119$
0%
$120$

The correct IUPAC name of compound ?

0%
1- Chloropentane - 1, 4-dione
0%
4-Chlorocarbonylbutan-2-one
0%
4-Oxopentanoyl chloride
0%
3-Oxobutanecarbonyl chloride

IUPAC Name of

0%
4-Bromo-6-chloro-2-ethyl-1-methylcyclohex-1-ene
0%
5-Bromo-1-chloro-3-ethyl-2-methylcyclohex-2-ene
0%
5-Bromo-3-chloro-1-ethyl-2-methylcyclohex-1-ene
0%
1-Bromo-5-chloro-3-ethyl-4-methylcyclohex-3-ene

Which of the following carbocation will undergo rearrangement?

What is derived name of Neopentyl alcohol?

0%
Isopropyl carbinol
0%
n - Butyl carbinol
0%
Tertiary butyl carbinol
0%
Ethyl methyl carbinol

Explanation

$CH_3 - \underset{CH_3}{\underset{|}{\overset{CH_3}{\overset{|}{C}}}} - CH_2 - OH$

$\rightarrow$ Neopentyl alcohol or tertiary butyl carbinol
because

$CH_3 - \underset{CH_3}{\underset{|}{\overset{CH_3}{\overset{|}{C}}}}$ (tertiary butyl)

$CH_3 - OH$ (carbinol)

IUPAC name of the given compound is:

0%
Z-2-chloro-4-hydroxy-2-butene
0%
Z-4-chloro-2-butene-2-ol
0%
Z-4-chlorobut-3-ene-2-ol
0%
Z-2-chloro-3-butene-2-ol

How many different functional group are present in the given molecule.

0%
4
0%
5
0%
3
0%
2

Which of the following pairs is correctly matched?

0%
amino acid alanine ; opticallt active
0%
0%
0%

The correct IUPAC name of the compound

$(CH_3CH_2)_2NCH_3$ is:

0%
N - Ethyl-N-methyl ethanamine
0%
N, N-Diethylethanamine
0%
N-methylethanamine
0%
N-ethylethanamine

Explanation

$(CH_3CH_2)_2NCH_3$ it is a tertiary amine, and the parent chain is ethanamine.

IUPAC name is N - Ethyl - N- methyl ethanamine.

Which of the following is/are incorrect IUPAC name?

The IUPAC name of following compound

0%
5-carboxypent-3-enal
0%
pent-3-en-5-al-1-oic acid
0%
5-formyl-pent-3-en-1-oic acid
0%
pent-5-al-3-ene-1-oic acid

Explanation

pent

$-5-$ al

$-3-$ ene

$-1-$ oic acid.
1156873_1173528_ans_4d85a689d5654ff0be6fa92750693181.PNG

The IUPAC name of ?

0%
1-Methyl-5-ethyl cyclohex-2-ene
0%
5-Ethyl-1-methyl cyclohex-2-ene
0%
4-Ethyl 6 methyl cyclohex-1-ene
0%
Ethyl-5-methyl cyclohex-3-ene

IUPAC name of this...

0%
3- chloro-2,3- Dimethylbutane
0%
2- chloro-3,3- Dimethylbutane
0%
2- chloro-2,3- Dimethylbutane
0%
2- chloro-1,3- Dimethylbutane

I.U.P.A.C name of

0%
4 - Bromo - 3- iodo cyclohexa- 1, 3 - diene
0%
1 - Bromo - 2- iodo cyclohexa- 1, 3 - diene
0%
1 - Bromo - 2- iodo - 1, 3 -cyclohexadiene
0%
(b) and (c) both are correct

The halogen atom in aryl halide is:

0%
O-and p-directing
0%
m-directing
0%
o,m an p-directing
0%
O-and m-directing

IUPAC name of the following compound is :

0%
$6-ethyl-1,4,8-octanetrioic\,acid$
0%
$2,ethyl-1,4,6-hexanetricarboxylic \,acid$
0%
$3-ethyl-5-carboxyoctanedioic\,acid$
0%
$4-carboxy-6-ethyloctanedioic\,acid$

Explanation

$2,ethyl-1,4,6-hexanetricarboxylic\,acid$
1380913_1243367_ans_bc30eacab4d640d2ad5fa3e730f3adfd.png

Image result for 2-Bromo-3-iodo-2-methylbutane formula

iupac name of this molecular

0%
2-Bromo-3-iodobutane
0%
2-Bromo-2-iodobutane
0%
2-Bromo-3-iodo-2-methylbutane
0%
2-Iodo-3-bromo-2-methylbutane

Explanation

$2$ - Bromo-

$3$ -iodo-

$2$ -methylbutane
1380744_1243451_ans_b2031444e3a945fa8dc7d730440a2723.png

The IUPAC name of

0%
(Z)-4, 6-Dimethyloct-4-en-3-one
0%
(E)-4, 6-Dimethyloct-4-en-3-one
0%
(Z)-4, 6-Dimethyloct-4-en-6-one
0%
(E)-3, 5-Dimethyloct-4-en-6-one

The

$IUPAC$ name of

$CH_3 - \underset{CH_3}{\underset{\!\!\!\!\!|}{CH}} - CH_2 - \overset{O}{\overset{||}{C}} - Br$ is :

0%
$2-$ Methylbutanoyl bromide
0%
$2$ -Methylbutan $4-$ bromide
0%
$1-$ Bromo- $-$ Methylbutanone
0%
$3-$ Methylbutanoyl bromide

The IUPAC name of acraldehyde is:

0%
Prop-1-ene-2-al
0%
Prop-2-ene-3-al
0%
Prop-2-ene-1-al
0%
Prop-ene-1-al

The IUPAC name of

0%
N,N-dimethylmethanal
0%
N,N-dimethylmethanamide
0%
N,N-dimethylcarbaldehyde
0%
None

The major product formed when a 3,3- dimethyl butan-2-ol is heated with concentrated sulphuric acid is:

0%
2,3- dimethyl-2-butene
0%
2,3-dimethyl-1-butene
0%
3,3-dimethy-1-butene
0%
cis and trans isomers of 2,3- dimethy-1-butene
0%
cis and trans isomer of 3,3- demethy-1- butene.

CBSE Questions for Class 11 Medical Chemistry Organic Chemistry Some Basic Principles And Techniques Quiz 8 - MCQExams.com

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Practice Class 11 Medical Chemistry Quiz Questions and Answers

CBSE Questions for Class 11 Medical Chemistry Organic Chemistry Some Basic Principles And Techniques Quiz 8 - MCQExams.com

0:0:1

Practice Class 11 Medical Chemistry Quiz Questions and Answers

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