Question # 1

Which of the following organic molecule is not aromatic.

Choose an answer

Benzene

Naphthalene

Anthracene

Cyclo-octatetraene

Inorganic acids (HCl, HBr, HNO3 etc) have K value.

Choose an answer

< 1

>1

>10

<10

The study of coiled long peptide chains of protein to give a 3 dimensional structure is the study of.

Choose an answer

Primary structure

Secondary structure.

Tertiary structure

Quaternary structure.

The unit of nucleic acid having base sugar combination is called.

Choose an answer

Nucliec acid

Nucleoside

Nucleotide

None of these

Which of the following polymers is chlorinated.

Choose an answer

Orlon

Neoprene

Dacron

None of these

The bond length of C = C is

Choose an answer

1.20 A^o

1.34 A^o

1.54 A^o

1.68 A^o

An example of acyclic monotterpenoid is

Choose an answer

a -pinene

Camphor

Geranial

Citral

How many stereoisomers are possible for CH3CH = CHCHCH(Br) CH3

Choose an answer

2- geometrical isomers

2- optical isomers

2- geometricla nad 2- optical isomers

2- geometrical and 1 optical isomers

Gutta percha is

Choose an answer

Cis poly imprene

Trans -polyisoprene

Polyethylene

Polyisobutylene

Identify an oxygenated cyclic terpenoid

Choose an answer

a- pinene

Camphor

Citral

Geranial

Different arrangement of groups in space which can be converted into one another by rotation around a single bond are caled.

Choose an answer

Conformations

Metameres

Enatiomers

All of the above

Select the major product obtained from the addition HBr to 1-methyl cyclohexene.

Choose an answer

1- bromo -2- methyl cyclohexane

6- bromo-1- methyl cyclohex - 1- ene

3- bromo-1- methyl cyclohex -1- ene

1- bromo-1- methyl cyclohexane

Correct order of increasing ______ I effect of groups is

Choose an answer

----- NO2 >-----------CN > ------------COOH > -------------F

--------F > -------------COOH>----------CN>--------NO2

-----F> -------------CN>--------NO2 > COOH

-------CN > ------------COOH > -----------NO2 >----------F

Which of the following is the major process when neopentyl bromide is dehydrogenate with alcoholic potash.

Choose an answer

2- methyl -1- butene

2- methyl- 1- butene

2,3 -dimethyl butene

2- butene

Carbon and Hydrogen are estimated by

Choose an answer

Liebig's method

Kjeldhal's method

Carries method

None of the above

Urea an enzyme used to estimate urea is a

Choose an answer

Hydrolytic enzyme

Oxidative enzyme

Reductive enzyme

Iso me rising enzyme

Combination of a -amino acid through which linkages results result in formation of protein

Choose an answer

Ester linkage

Glycosidic linkage

Lactum linkage

Peptide linkage

Which one of the following woul dmake an S_N2 mechanism more likely

Choose an answer

Bulky substituents near the halogen

A polar solvent

A tertiary carbocation intermediate

A reactive nucleophile

It is possible to distinguish between optical isomers.

Choose an answer

Using chemical tests

By mass spectrometry

By IR spectroscopy

By polarimetry

Compounds HCN and HNC are.

Choose an answer

Tautomers

Metamers

Functional isomers

Conformers

The dye which is a constituent of Skiffs reagent used for detection formaldehyde group is.

Choose an answer

Gentain violet

Megneta

Phenolphthalein

Rosolic acid

More Classes

Other Links

PPSC Chemistry Part II Organic Chemistry Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer