List of top Organic Chemistry Questions asked in GPAT

Establishing a complete structure of is more complex problem than others.

Match List I with List II:

List I		List II
A.	Penicillin	I.	Single cell protein
B.	Penicillin	II.	Ion exchange chromato- graphy for recovery
C.	Streptomycin	III.	Primary metabolite
D.	Amino acids	IV.	Phenyl acetic acid as precursor

Choose the correct answer from the options given below:

___activates G-protein gated potassium channel resulting in membrane hyperpolarization.

One of the following match is correct choose it:

Isoquinoline on treatment with oleum at 90°C yields majorly:

Predict the theoretical max value for the following compound using Woodward-Fieser rules. Base value for the compound is 215 nm:

Amphetamine undergoes one of the following metabolic reaction to convert to 1-phenyl-2-propanol metabolite via ketone formation:

What is the popular common name for a bioactive compound with chemical name of (m-hydroxyphenyl)-trimethyl ammonium methyl sulphate dimethyl carbomate?

Which among the following Cephalosporins has an unusual 5-thio-1,2,3,4-tetrazole substituent attached to core heterocyclic nucleus through a methylene bridge?

The C-2 epimer of D-glucose is:

_____ is an example of aromatic nucleophilic substitution reaction.

Identify pair of C₄ epimers:

Addition of HBr to 1.3-butadiene at 40°C yields:

A = Br₂, B = KOH, C = NaNH₂ Which heterocyclic ring is fused to a steroidal nucleus in Danazol?

Which of the following factor make carbonyl group in acyl compounds, too, susceptible to nucleophilic attack?

The tendency of carbon to loose electrons even at the expense of gaining positive chargeIdentify intermediate forms in following substitution reaction:

Identify A, B and C in below reaction:

Conversion of cyclic ketone to ring expended cyclic ester takes place by:

Which of the following surfactants is an ANIONIC surfactant?

Which of the following is the common chemical name for Propellant 11?

Electrophilic substitution reaction of pyridine, when carried out in the presence of KNO₃ and conc. H2SO₄ at 300°C, leads to the formation of:

Following groups exert any one of the effects on electrophilic aromatic substitution

Identify whether all three are:

How many optical isomers are possible for lactic acid?

A reagent may attach itself to a conjugated diene to the carbons at the two ends of the conjugated system. Identify the reaction involved from the following:

The perfect orientation for a Diels-Alder reaction between the reactants is: