Chemistry Chapter 13 Entry Test MCQs
Topic 13
Classification + Hybridization
1. Who synthesized the first organic compound urea in the laboratory
a. Fraizer
b. Kolbe
c. Berzilius
d. Wohler
2. 2,3-dimethyl hexane contains …. tertiary …. Secondary and ….. primary carbon atoms, respectively.
a. 4, 3, 2
b. 2, 4, 3
c. 2, 2, 4
d. 3, 2, 4
3. The mains reason for a large number of compounds is unique property of
a. Catenation
b. Isomerism
c. Complexity of nature
d. Homologous series
4. Which is not organic in nature?
a. Formic acid
b. Na2CO3
c. CO(NH2)2
d. CH3COOH
5. When the number of carbon atoms increases to thirty, the number of isomers amount to over:
a. Four million
b. Four billion
c. two million
d. two billion
6. Which heterocyclic compound has six membered ring?
a. Furan
b. Pyridine
c. Thiophene
d. Pyrole
7. Which of the following is heterocyclic but unsaturated compound?
a. Molozonide
b. Furan
c. Aniline
d. ethylene epoxide
8. Heteroatom in Furan:
a. N
b. N
c. F
d. O
9. Which compound will have the maximum repulsion with H2O
a. C2H6O
b. C6H6
c. CH3OH
d. C2H5OH
10. Pyrrol is:
a. Heterocyclic aromatic
b. Homocyclic aromatic
c. Carbocyclic compound
d. Heterocyclic non aromatic
11. The number of tertiary carbon atom in isobutane is:
a. 2
b. 0
c. 3
d. 1
12. Which term is used to convert higher alkane into lower alkane / alkene
a. Catalysis
b. Pyrolysis
c. Electrolysis
d. Hydrolysis
13. The purest form of carbon is:
a. Bituminous coal
b. Lignite
c. Anthracite
d. Peat
14. Friederick Wohler rejected vital force theory by artificially synthesizing urea as a result of heating of
a. Ammonium sulphate
b. Ammonium nitrate
c. Ammonium cyanate
d. Ammonium chloride
15. All of the following are heterocyclic containing nitrogen as heteroatom EXCEPT:
a. Quinolene
b. Pyridine
c. Aniline
d. Pyrole
16. Neo-pentane contains how many primary hydrogen:
a. 12
b. 1
c. Zero
d. 6
17. The number of sp3 hybridized carbon in 1,5-hexadiene are
a. Three
b. One
c. Zero
d. Two
18. What is hybridization of primary carbocation?
a. sp
b. sp3
c. sp2d
d. sp2
19. Hydrocarbons are compounds that contain
a. C, O & H, only
b. C, only
c. C, O, N & H, only
d. C & H, only
20. The compound having only primary hydrogen atoms is
a. Cyclohexane
b. Isobutene
c. butyne
d. 2,3-dimethyl-2-butene
21. Which of the following is not alicyclic?
a. Toluene
b. Cyclopropane
c. Cyclopentane
d. Cyclobutane
22. The most appropriate statement regarding organic compounds is
a. Presence of carbon is not essential
b. They possess ionic and covalent bonds
c. Their reactions are fast
d. They are found in a large number
23. Orbital interaction between the sigma bonds of a substituent group and a neighbouring pi orbital is known as
a. Resonance effect
b. Hyper conjugation
c. Steric effect
d. Inductive effect
24. The homocyclic compound which contain a ring of three or more carbon atoms and resembling aliphatic compound are called
a. Heterocyclic
b. Alicyclic
c. Aromatic
d. Acyclic
25. Which type of cracking is useful in the production of better quality gasoline:
a. Steam cracking
b. Thermal cracking
c. Hydro-cracking
d. Catalytic cracking