List of top Questions asked in GPAT- 2021

Formaldehyde undergoes Grignard reaction to give
The system volume is increased when sheared is called
HEPA filters are defined as A or more efficient in removing, from the air, B particles generated by vaporization of the hydrocarbon Emory 3004.
This Compound 2,5,8,11,14,17,20,23,26-nona-oxaoctacosan-28-yl p-(butylamino) benzoate is usually known for its activity?
Four-membered fully saturated heterocycle containing one oxygen is called
Which one of the following plexus is a part of the central nervous system in the brain and consists of capillaries, ventricles, and ependymal cells?
Which is NOT the colligative property?
(A)Depression of freezing point
(B) Elevation of boiling point
(C)Elevation of vapour pressure
(D) Osmotic pressure
Choose the correct one of the following:
Formation of pyranose structure from glucose leads to formation of diastereoisomers called
Vigabatrin produces anti-epileptic activity through
For 1,3-butadiene, there are ____ molecular orbitals for п electrons
Preservatives are usually not added to
The total number of amino acids in human insulin (total number of amino acids in A and B chain) is
Match List I with List II :

Column I
Term or Phrase 

Column II 
Meaning

AGutturiIInto the left ear
BIn oculum sinistramIIInto the right eye  
CIn aurem sinistramIIIFor the left eye 
DIn oculum dextrum IVTo the throat 

Choose the correct answer from the options given below :
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Gram negative bacteria do not retain the primary stain when washed with alcohol and subsequently stained again with secondary stain.
Reason (R): The outer membrane of gram negative bacteria contains lipopolysaccharides.
In light of the above statements, choose the correct answer from the options given below
Silver nitrate reagent is used for limit test in Indian Pharmacopoeia for
Match the types of terpenes under column I with their respective examples under Column II

Column I
Types of terpenes

Column II 
Examples

AMonoterpenesILycopene
BDiterpenesIICamphor
CSesquiterpenesIIITaxol
DTetraterpenesIVZingiberene

Choose the correct answer from the options given below :
A diuretic compound cyclothiazide has a ____ substituent at C-3 of 1,2,4- benzothioadiazine nucleus?
Which one of the following drugs that is not absorbed orally, is not a bronchodilator, does not have any direct effects on smooth muscles yet is effective in antigen-induced, exercise- induced and irritant-induced asthma though not all asthmatics respond to it positively?
Substitution constant for meta benzoic acids is denoted by
Match the following vaccines under Column I with their respective content under Column II.

Column I
Vaccine

Column II 
Content

AOPVIKilled bacteria
BTyphoid (TAB)IILive bacteria 
CTetanusIIIKilled virus
DBCGIVLive virus 
  VToxoid

Choose the correct answer from the options given below :
Which among the following drugs on standing in aqueous solution can dimerize to 2,5- bis(aminoxy-methyl) 3,6-diketopiperazine?
A condition in which there is severe loss of extra-cellular fluid due to hemorrhage, diarrhea, severe vomiting or sweating followed by shrinkage of blood volume, reduction of venous inflow to the heart, reduction of cardiac output and fall of blood pressure is known as:
Which one of the following calcium channel blockers used as anti-anginal agents has the highest possibility to produce a negative inotropic effect, AV nodal block, bradycardia, decreased cardiac output, constipation, edema and is contra-indicated in sick sinus syndrome?
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A): Quillaia tincture is included in Potassium Citrate Mixture BPC.
Reason (R): Because Quillaia tincture act as an emulgent in Potassium Citrate Mixture BPC, and prevent separation of lemon oil as a surface layer when the lemon spirit is added.
In light of the above statements, choose the correct answer from the options given below
Pyridine upon hydrogenation in presence of platinum at 25°C and 3 atm pressure yields