Organic Chemistry NDA Questions

NDA Chemistry

Organic Chemistry MCQ Questions


13.
Nitrogen, sulphur, halogens and phosphorus present in an organic compound are detected by _____
A.
Lassaigne’s test
B.
Distillation test
C.
Partition chromatography
D.
None of these
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ANSWER :
A. Lassaigne’s test
14.
_____ is based on continuous differential partitioning of components of a mixture between stationary and mobile phases
A.
Adsorption chromatography
B.
Fractional distillation
C.
Partition chromatography
D.
Thin layer chromatography
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ANSWER :
C. Partition chromatography
15.
_____ and hydrogen are detected by heating the compound with copper(II) oxide
A.
Nitrogen
B.
Carbon
C.
Oxygen
D.
Helium
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ANSWER :
B. Carbon
16.
CH₂(OH)CH₂(OH) is named as _____
A.
Ethane-1,2-diol
B.
Methane-1,2-diol
C.
Propane-1,2-diene
D.
Methane-1,2-diene
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ANSWER :
A. Ethane-1,2-diol
17.
A reagent that brings an electron pair to the reactive site is called a _____
A.
Electrophile
B.
Nucleophile
C.
Optical isomers
D.
None of these
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ANSWER :
B. Nucleophile
18.
The compounds that have the same constitution and sequence of covalent bonds but differ in relative positions of their atoms or groups in space are called
A.
Stereoisomers
B.
Metamers
C.
Optical isomers
D.
Position isomers
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ANSWER :
A. Stereoisomers