More Classes
5th Class
6th Class
7th Class
8th Class
9th Class
10th Class
11th Class
12th Class
NAT I
NAT II
CSS
IQ
General Knowledge
MDCAT
ECAT
GAT General
GAT Subject
Other Links
Go to Home
Online Tests
PPSC Chemistry Part II Organic Chemistry Online Test MCQs With Answers
Question # 1
Which of the following compounds would you use in order to obtain a crystalline derivative of an aromatic amine.
Choose an answer
2,4 Dinitrophenyl hydrazine
Nitrous acid
Benzoyl chlride
None of these
Previous
Skip
Next
Question # 2
Cyclic polymers of ethylene glycol formed by condensation are called.
Choose an answer
Crown ether
Brown ether
Cryptates
Both A and C
Previous
Skip
Next
Question # 3
Which of the following statements is false about enantiomers.
Choose an answer
Rotate plane of polarized light
Are superimposable mirror images
Nbonsuperimposable mirror images
All of the above
Previous
Skip
Next
Question # 4
The process of transfer of genetic message from DNA to m-RNA is known as
Choose an answer
Refplication
Translation
Transcription
Transference
Previous
Skip
Next
Question # 5
The electrophile in the sulphonation of benzene is.
Choose an answer
SO3
SO3H
HSO4
SO2
Previous
Skip
Next
Question # 6
1-Butyne on oxymereuration -demercuration would give.
Choose an answer
Butanone
Butanal
Propanol and methanol
Propanoic acid and formic acid
Previous
Skip
Next
Question # 7
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
Previous
Skip
Next
Question # 8
Which of the following is most basic.
Choose an answer
Aniline
Benzylamine
Diphenylamine
N-methylaniline
Previous
Skip
Next
Question # 9
Peppermint oil contains.
Choose an answer
Menthol
Thymol
a-pinene
Comphene
Previous
Skip
Next
Question # 10
A salt solution is treated with chloroform drops.Then it is shaken with chlorine water, chloroform layer become violet solution contains.
Choose an answer
NO2 ion
NO3 ion
Br ion
I- ion
Previous
Skip
Next
Question # 11
Which of the following alkyl halide undergoes nucleophilic substitution reaction via the formation of a carboncation.
Choose an answer
1-chloro -2 methyl propane
2- chlro-2-methyl propane
2- chloro butane
1-Chloro, 3,3- dimethyl pentane
Previous
Skip
Next
Question # 12
What is the possible number of optical isomers for a compound contained 2 dissimilar asymmetric carbon atoms.
Choose an answer
2
4
6
8
Previous
Skip
Next
Question # 13
Who proved that all the six hydrogen atoms in benzen are equivalent.
Choose an answer
Kekule
Ladenburg
Faraday
Wohler
Previous
Skip
Next
Question # 14
A correct reaction mechanism for a given reaction usually is.
Choose an answer
The same as the balanced chemical equation
Obvious if its heat of reaction is known
Sometimes difficult to prove
Obvious if the activation energy is known
Previous
Skip
Next
Question # 15
A terpenoid which has as alcoholic group in the molecule is.
Choose an answer
Citral
Camphor
Menthol
Carvone
Previous
Skip
Next
Question # 16
Which of the following statements regarding phenols is not correct.
Choose an answer
Phenol ls are stronger acids than water and alcohols.
Phenol are weaker acids than carboxylic acids
Phenol are solubel in both aqueous NaOH and aqueous sodium hydrogen carbonate
Phenoxides ions are more stable than the corresponding phenol
Previous
Skip
Next
Question # 17
The decrease in electron density at one position accompanied by a corresponding increase at other position is called.
Choose an answer
Inductive effect
Asymmetric effect
Electromeric effect
Resonance effect
Previous
Skip
Next
Question # 18
Which of the following statements in not correct with respect to the important characteristics of aromatic compounds.
Choose an answer
They are usually cyclic compounds
They are resistant to usual addition reactions
They usually undergo substitution reactions
They are less stable
Previous
Skip
Next
Question # 19
Arrangement of peptide chains of protein in spec to form helix stucture is referred to as.
Choose an answer
Primary structure
Secondary structure
Tertiary structure
Quaternary structure
Previous
Skip
Next
Question # 20
Trimethylamine is a weaker base than dimethylamine is explained by
Choose an answer
Steric effct
Resonance effect
Inductive effect
All above
Previous
Skip
Next
Question # 21
The terpenoid present in oil of lemon grass is
Choose an answer
Citral
Geranial
Nerol
a- terpineol
Previous
Skip
Next
Back