basic concept of organic chemistry
Class: XITime allowed: 180 (Minutes)
Subject: ChemistryTotal Marks Added: 66.0
Question 1. Tetra hydro furan is classified as ____
A) alicyclic compound
B) aromatic compound
C) heterocyclic compound
D) acyclic compound
1.0 Mark(s)
Question 2. Furan, thiophene and pyridine are called ____
compounds.
A) homocyclic
B) benzenoid
C) non-benzenoid
D) heterocyclic
1.0 Mark(s)
Question 3. Of the options given, ____ represents homologous
series.
A) Ethane, ethene, ethyne
B) methane, ethane, propane
C) methane, methanol, methanal
D) 1-hexene, 2-hexene, 3-hexene
1.0 Mark(s)
Question 4. Two major classes of organic compounds are ____and
____.
A) 1-homocyclic, 2-heterocyclic
B) 1-bezeneoid, 2-non-benzenoid
C) 1-acyclic, 2-aromatic
D) 1-acyclic, 2-alicyclic
2.0 Mark(s)
Question 5. Of the options given, the statement that is true is
'____' .
A) Tetrahydropyrrole and pyrrole are both alicyclic
compound.
B) Tetrahydropyrrole and pyrrole are both heterocyclic
compound.
C) Tetrahydropyrrole is alicyclic heterocyclic compound and
pyrrole is aromatic heterocyclic compound.
D) Tetrahydropyrrole and pyrrole both contain sulphur in the
ring.
2.0 Mark(s)
Question 6. Pyrrole is an heterocyclic compound containing
________
A) sulphur
B) oxygen
C) nitrogen
D) phosphorus
1.0 Mark(s)
Question 7. Of the options given, the incorrect statement is,
____ .
A) Non-benzenoid structure does not contain a benzene ring;
instead, it contains other highly unsaturated ring.
B) Benzenoid compounds contain atleast one or more benzene
ring.
C) Non-benzenoid compounds are examples of heterocyclic
compopunds.
D) Carbocyclic compounds which resemble aliphatic compounds in
most of their properties are called alicyclic compounds.
2.0 Mark(s)
Question 8. The compound ____ is formed in the positive test for
nitrogen with Lassaigne solution of an organic compound.
A) Fe(CN)3
B) Na3[Fe(CN)6]
C) Fe4[Fe(CN)6]3
D) Na4[Fe(CN)5COS]
1.0 Mark(s)
Question 9. If the sum of the percentages of various elements
present in a compound is less than 100, then the compound contains
____.
A) hydrogen
B) carbon
C) nitrogen
D) oxygen
1.0 Mark(s)
Question 10. The formula for ferric ferrocyanide is ____.
A) Fe4[Fe (CN)6]3
B) Fe3[Fe (CN)5]3
C) Fe3[Fe (CN)6]3
D) Fe4[Fe (CN)5]3
1.0 Mark(s)
Question 11. The colour of the precipitate formed by ammonium
phosphomolybdate is ____.
A) white
B) red
C) yellow
D) black
2.0 Mark(s)
Question 12. In the estimation of oxygen, all oxygen in the
organic compound are converted into ____.
A) carbon monoxide
B) nitrogen oxide
C) carbon dioxide
D) nitrogen dioxide
1.0 Mark(s)
Question 13. HC C - CH = CH - CH3 has _______ sigma bonds and
____ pi bonds.
A) 10; 3
B) 8; 2
C) 12; 2
D) 9; 3
1.0 Mark(s)
Question 14. Of the compounds given, _____ has only one type of
hybrid carbon.
A) CH2= CH - CH = CH2
B) HC C - C CH
C) H3C - C C - CH3
D) CH3 - CH2 - CH2- CH3
1.0 Mark(s)
Question 15. The number of possible alkynes with the molecular
formula C5H8 is ____.
A) two
B) three
C) four
D) five
2.0 Mark(s)
Question 16. The increasing order of electrophilic substitution
of the following is _________________ .
A) I
