Chemistry - Introduction To Organic Chemistry
Exam Duration: 45 Mins Total Questions : 30
Percentage of carbon is maximum in
- (a)
peat
- (b)
lignite
- (c)
bituminous
- (d)
anthracite
When formic aid is heated with concentrated sulphuric acid the compound formed is
- (a)
CO
- (b)
CO2
- (c)
HCHO
- (d)
NONE OF THESE
The IUPAC name of the compound having the structure (CH3)3CCH=CH2 is
- (a)
3,3,3-Trimethy1 propene
- (b)
1,1,1-trimethy1 2-propene
- (c)
3, 3-dimethy1 1-butene
- (d)
2, 2-dimethy1 3-butene
Which of the following compounds displays geometrical isomerism?
- (a)
CH2=CHBr
- (b)
CH2=CBr2
- (c)
Cl CH=CH Cl
- (d)
Br2 C=C Cl2
The compounds \(C_2H_5OC_2H_5\)and \(CH_3OCH_2C_2H_5\) are
- (a)
enantiomers
- (b)
geometrical isomers
- (c)
metamers
- (d)
functional isomers
Which one of the following has asymmetric carbon?
- (a)
CH3CHOHCH3
- (b)
CH3CH(OH)2
- (c)
CH2OHCHOHCH2OH
- (d)
CH3CHCOHCOOH
Number of isomers of nitrophenol,C6H4(OH)NO2 is
- (a)
0
- (b)
3
- (c)
4
- (d)
2
The correct IUPAC name of \(C{ H }_{ 3 }-C{ H }_{ 2 }-C\equiv CH=C{ H }_{ 2 }\) is
- (a)
3-hexyne-5-ene
- (b)
5-hexyne-3-yne
- (c)
3-hexyne-1-ene
- (d)
1-hexene-3-yne
The IUPAC name for CH3-CH2COCH2-COCOOH is
- (a)
2,4 dioxo-hexanoic acid
- (b)
propiony1 capronic acid
- (c)
\(\alpha ,\gamma \) dioxo-capronic acid
- (d)
hexane dione-2, 4 ic-1-oic
Which of the following compounds will show functional isomerism?
- (a)
CH3CH2CH2OH and CH3 CHOH-CH3
- (b)
C2H5NH2 and (CH3)2 NH
- (c)
CH3CH2OH and CH3-O-CH3
- (d)
CH3CH(CH3)2 and CH3CH2CH2CH3
The structure of benzene is best represented as a resonance hybrid of
- (a)
two equivalent structures
- (b)
three equivalent structures
- (c)
four equivalent structures
- (d)
six equivalent structures
What is the number of possible alkynes with the molecular formula C5H8?
- (a)
2
- (b)
3
- (c)
4
- (d)
5
Which of the following molecular formulae belongs to the acetylene series?
- (a)
C7H12
- (b)
C9H18
- (c)
C12H26
- (d)
C15H30
The IUPAC name of the compound represented by the formula \(C{ H }_{ 3 }-CH-C{ H }_{ 2 }=C{ H }_{ 2 }\\ \quad \quad \quad \quad |\\ \quad \quad \quad \quad C{ H }_{ 3 }\) is
- (a)
3-methy1-1-butene
- (b)
1-hexene
- (c)
4-methy1pentene
- (d)
4-methy1-1-pentene
Isomers of a substance must have the same
- (a)
structural formula
- (b)
chemical properties
- (c)
molecular mass
- (d)
physical properties
The number of isomerism open chain hydrocarbons with molecular formula C5H10 is
- (a)
3
- (b)
4
- (c)
5
- (d)
6
Which of the following statements is not correct about pairs of enantiomers?
- (a)
They have similar physical properties
- (b)
They have identical biological activities
- (c)
They have similar chemical properties towards chiral reagents
- (d)
Dextro from rotate plane polarised light to the right
A similarity between optical and geometrical isomerism is that
- (a)
each forms equal number of isomers for a given compound
- (b)
if in a compound one is present then so is the other
- (c)
both are included in stereo isomerism
- (d)
they have no similarity
Which of the following does not show geometrical isomerism?
- (a)
1, 2-dichloro-1-pentene
- (b)
1, 3-dichloro-2-pentene
- (c)
1, 1-dichloro-1-pentene
- (d)
1, 4-dichloro-2-pentene
In the given heptane \({ ^{ 1 } }C{ H }_{ 3 }-{ ^{ 2 } }C{ H }_{ 2 }-{ ^{ 3 } }C{ H }_{ 2 }-{ ^{ 4 } }C{ H }_{ 2 }-{ ^{ 5 } }C{ H }_{ 2 }-{ ^{ 6 } }C{ H }_{ 2 }-{ ^{ 7 } }C{ H }_{ 3 },\) if one hydrogen is substituted by -OH group to give an optically active alcohol, the substitution should be done at carbon numbered
- (a)
1
- (b)
3
- (c)
4
- (d)
7
The IUPAC name for the following is
\(\quad\quad\quad\quad OH\quad \quad \quad \quad \quad\quad OH\\ \quad \quad \quad \quad \quad |\quad \quad \quad \quad \quad \quad \quad |\\ C{ H }_{ 3 }-CH-C{ H }_{ 2 }-CH-C{ H }_{ 3\\ \\ }\\ \quad \quad \quad \quad \quad |\\ \quad \quad \quad \quad C{ H }_{ 3 }\\ \quad \quad \quad \quad \)
- (a)
1,1-dimethyl 1-1 , 3 butanediol
- (b)
2- methyl -2 , 4 pentanediol
- (c)
4-methyl -2,4 pentanediol
- (d)
1,3,3-trimethyl -1,3 propanediol