FIND OUT GPAT PAPER - 2017, with key answers

 

1. In a free radical reaction, free radicals are formed at
(a) Initiation step (b) Propagation step (c) Termination step (d) Both (a) and (b)

2. Which of the following dienes can undergo Diels–Alder reaction most readily

3. Separating techniques such as gas chromatography and liquid chromatography are not appropriate for separation of amino acids. Select correct reason from the following
(a) Amino acids high polarity substances
(b) Amino acids are low polarity substances
(c) Amino acids are non polar substances
(d) Amino acids lowly charges substances

4. When trans-2-butene is treated with bromine an anti-addition of bromine yields meso- 2,3- dibromobutane.
Select the correct statement regarding the reaction from the following
(a) The reaction is stereoselective as well as stereo specific
(b) The reaction is stereoselective and not stereo specific
(c) The reaction is nonstereoselective as well as non stereo specific
(d) The reaction is stereo specific and not stereo selection

5. Reduction of imines to give amines in protic solvents can be carried out by one of the following reagents. Select the correct reagent
(a) Sodium hydride
(b) Sodium chloride and HCl
(c) Lithium aluminium chloride
(d) Sodium cyanoborohydride

6. In the reaction of 2-nitrotoluene with bromine in presence of iron, which of the product shownbelow is the most abundant (major) product

7. Which of the following cannot react as a nucleophile
(a) (CH3)4 N+ (b) CH3NH2  (c) (CH3)2 NH (d) (CH3)3N

8. Which of the following compounds will be oxidized by CrO3 in acid
(a)4-Methylcyclohexene (b) 3-Methyl 3-hydroxyclohexanone
(c) 4,4-Dimethyl-1-methyl-1,3-cyclohexandiol (d) 2-Methylcyclohexanone

9. Which of the following compounds absorbs at the longest wavelength
(a) 1,3,5-Hexatriene (b) 1,3,5,7-Octatetraene
(c) 1,7-Diphenyl-1,3,5-heptatriene (d) 1,6-Diphenyl-1,3,5-heptatriene

10. Which of the following reagents will reduce a disubstituted alkyne to trans-alkene
(a) Na and NH3
(b) LiAlH4
(c) B2H6
(d) Pd and H2

11. Which of the following statement is true about following reaction

(a) The product will not have a stereo center
(b) The product will have R configuration
(c) The product will not have S configuration
(d) The reaction will happen with racemisation

12. Which functional group is present in the molecule shown below
(a) Amide (b) Alcohol (c) Ester (d) Ether

13. Match the following agents that cause cancer with the preferable sites for where it might cause
1. Arsenic (a) Prostate
2. Benzene (b) Angiosarcoma
3. Cadmium Compounds (c) Leukemia
4. Vinyl chloride (d) Hemangiosarcoma
(a) 1 - d; 2 - c; 3 - a; 4 -b
(b) 1 - b; 2 - a; 3 - c; 4- d
(c) 1 - c; 2 - d; 3 - b;4 - a
(d) 1 - a; 2 - b; 3 -d; 4 - c

14. If the pKa of lidocaine is 7.9 and pH of the infected tissue is 8.9, the fraction of drug in the ionized form will be
(a) 10% (b) 1% (c) 90% (d) 99%

15. Which among the following are the salient features of Glucocorticoids
(a) Gets combined with highly specific cytosolic glucocorticoids
(b) They promote phagocytosis by macrophages
(c) Releases of lytic enzymes
(d) Increases lipid eicosanoids and prostaglandin gene

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