JEE Main Previous Year Papers Questions of Chemistry with Solutions are available at eSaral. Practicing JEE Mains chapter wise questions of Chemistry will help the JEE aspirants in realizing the question pattern as well as help in analyzing weak & strong areas.
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Previous Years AIEEE/JEE Main Questions
(1) >C = O and –OH (2) –OH and –CHO (3) –OH and –COOH (4) –CHO and –COOH AIEEE-2009
(1) proteins (2) carbohydrates (3) polypeptides (4) urea AIEEE-2010
(1) 3rd (2) 4th (3) 1st (4) 2nd AIEEE-2011
(1) tautomerism (2) racemisation (3) specific rotation (4) mutarotation AIEEE-2011
(1) All amino acids except glutamic acid are optically active (2) All amino acids except lysine are optically active (3) All amino acids are optically active (4) All amino acids except glycine are optically active AIEEE-2012
(1) 18 molecules of ATP (2) 10 molecules of ATP (3) 8 molecules of ATP (4) 6 molecules of ATP JEE Main -2013
Six rounds of the Calvin cycle are required, because one carbon atom is reduced in each round. Twelve molecules of ATP are expended. An additional six molecular of ATP are spent in regenerating ribulose-1, 5-biphosphate $6 \mathrm{CO}_{2}+18 \mathrm{ATP}+12 \mathrm{NADPH}+12 \mathrm{H}_{2} \mathrm{O} \rightarrow$ $\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+18 \mathrm{ADP}+18 \mathrm{P}_{\mathrm{i}}+12 \mathrm{NADP}+6 \mathrm{H} \oplus$ Reference : NCERT 11th class chapter-13 (Photosynthesis Pg. 217, 218 in higher plants. Calvin cycle where sugar is synthesised is as follows : The Calvin cycle proceeds in three stages (1) carboxylation, during which $\mathrm{CO}_{2}$ combines with ribulose-1.5-bisphosphate (2) reduction, during which carbohydrate is formed at the expense of the photochemically made ATP and NADPH and (3) regeneration during which the $\mathrm{CO}_{2}$ acceptor ribulose-1,5-bisphosphate is formed again so that the cylcle continues. It might help you to understand all of this if we look at what goes in and what comes out of the Calvin cycle.
(1) Cytosine (2) Thymine (3) Quinoline (4) Adenine JEE-Main 2014
All cytosine, thymine and adenine are present in DNA. Only quinoline is not present in DNA.
(1) Vitamin E (2) Vitamin K (3) Vitamin C (4) Vitamin D JEE-Main 2015
Vitamine C is soluble in water due to H-Bonding & all other vitamines given in question are fat soluble.
(1) glucose and fructose in equimolar amounts (2) glucose only (3) galactose and fructose in equimolar amounts (4) glucose and galactose in equimolar amounts JEE-Main(Online) – 2015
Starch is polymer of Glucose
(1) Pyruvic acid (2) L-lactic acid (3) Glycogen (4) Glucose JEE-Main(Online) – 2015
The pI (isoelectric point) of aspartic acid is : (1) 1.88 (2) 2.77 (3) 3.65 (4) 5.74 JEE-Main(Online) – 2016
(1) Starch (2) Reducing sugar (3) Cupric ion (4) Protein JEE-Main(Online) – 2017
JEE-Main 2017
(1) Ester in presence of Aqueous KOH solution give SNAE reaction so following reaction takes place
