List of top Questions asked in GPAT

Which of the following is correct order of stability of free radicals?

The C-2 epimer of D-glucose is:

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?

Following statement is correct with respect to voltage sensitive calcium channels:

A chromatogram of a peak provided a retention time at 5,4 minutes and 0.41 base width of the peak. The number of plates or the peak obtained is:

Which one of the following molecules has a dipole moment?

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?

Replacement of the diazonium group by halogen in presence of copper powder is:

In atomic absorption spectroscopy, back ground correction performed using a single hollow cathode lamp pulsed first with a low current and then with a high current is called:

_____ is an example of aromatic nucleophilic substitution reaction.

Phenol reacts with chloroform in presence of aqueous sodium hydroxide to give chief product:

Identify pair of C₄ epimers:

All the following about back nitration are true, EXCEPT

Which of the following ICH Hannonized Tripartite Guidelines related to stability, provides the general requirements for stability, testing of new drug substances and products?

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

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

Identify A, B and C in below reaction:

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

When exposed to carbon monoxide, the base pigment of Cytochrome P enzymes absorb light at:

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

Match List I with List II:

List I Name of the drug		List II Chemical class
A.	Zolpidem	I.	Cyclopyrrolone
B.	Zaleplon	II.	Benzodiazepine
C.	Zopiclone	III.	Imidazopyridine
D.	Triazolam	IV.	Pyrazolopyrimidine

Choose the correct answer from the options given below

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

Aklyl group in Grignard reagent serve as

The addition of Monobasic Potassium Phosphate to the suspended Bismuth Subnitrate particles cause the A to B owing to the C: