{"id":17663,"date":"2022-01-17T18:50:01","date_gmt":"2022-01-17T13:20:01","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/?p=17663"},"modified":"2022-01-21T15:17:05","modified_gmt":"2022-01-21T09:47:05","slug":"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/study-materials\/jee-main\/previous-year-papers-questions-with-solutions\/chemistry\/biomolecules-and-polymers\/","title":{"rendered":"JEE Main Previous Year Papers Questions With Solutions Chemistry Biomolecules and Polymers"},"content":{"rendered":"

1.RNA is different from DNA because RNA contains (2002)<\/strong>
\n(1)ribose sugar and thymine<\/strong>
\n(2)ribose sugar and uracil<\/strong>
\n(3)deoxyribose sugar and thymine<\/strong>
\n(4)deoxyribose sugar and uracil<\/strong>
\nAns.<\/strong>(2) RNA has ribose sugar and uracil base.<\/p>\n

2.The functional group, which is found in amino acid is (2002)<\/strong>
\n(1)- COOH group 2) \u2013 NH2<\/sub> group<\/strong>
\n3) \u2013 CH3<\/sub> group 4) both (1) and (2)<\/strong>
\nAns.<\/strong>(4) Amino acids contain \u2013 NH2<\/sub> and \u2013 COOH groups.<\/p>\n

3.Polymer formation from monomers starts by (2002)<\/strong>
\n(1)condensation reaction between monomers<\/strong>
\n(2)coordinate reaction between monomers<\/strong>
\n(3)conversion of monomer to monomer ions by protons \u2022<\/strong>
\n(4)hydrolysis of monomers<\/strong>
\nAns.<\/strong>(1)Polymerisation starts either by condensation or addition reactions between monomers.<\/p>\n

4.Nylon threads are made of (2003)<\/strong>
\n(1)Polyester polymer 2) Polyamide polymer<\/strong>
\n(3)Polyethylene polymer<\/strong>
\n(4)Polyvinyl polymer<\/strong>
\nAns.<\/strong>(2)Nylon is a polyamide.<\/p>\n

5.Complete hydrolysis of cellulose gives (2003)<\/strong>
\n(1)D-ribose 2) D-glucose<\/strong>
\n3) L-glucose 4) D-fructose<\/strong>
\nAns.<\/strong>
\n\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-5\"<\/p>\n

6.The reason for double helical structure of DNA is operation of (2003)<\/strong>
\n(1)dipole \u2013 dipole interaction<\/strong>
\n(2)hydrogen bonding<\/strong>
\n(3)electrostatic attractions<\/strong>
\n(4)van der Waal\u2019s forces<\/strong>
\nAns.<\/strong>(2) Helix is stabilised by hydrogen bonds.<\/p>\n

7.Which base is present in RNA but not in DNA?<\/strong>
\n1) Uracil 2) Thymine (2004)<\/strong>
\n3) Guanine 4) Cytosine<\/strong>
\nAns.<\/strong>(1)Uracil is not present in DNA.<\/p>\n

\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-\"
\nAns.<\/strong>
\n\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-8\"<\/p>\n

9.Which of the following is a polyamide? (2005)<\/strong>
\n1) Teflon . 2) Nylon \u2013 6,6<\/strong>
\n3) Terylene 4) Bakelite<\/strong>
\nAns.<\/strong>
\n\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-9\"<\/p>\n

10.Which of the following is fully fluorinated polymer ? (2005)<\/strong>
\n1) Neoprene 2) Teflon<\/strong>
\n3) Thiokol 4) PVC<\/strong>
\nAns.<\/strong>(2) Polytetrafluoroethylene.<\/p>\n

11.The term anomers of glucose refers to (2006)<\/strong>
\n(1)isomers of glucose that differ in configu\u00adrations at carbons one and four(C-land C-4)<\/strong>
\n(2)a mixture of (D)-glucose and (L)-glucose<\/strong>
\n(3)enantiomers of glucose<\/strong>
\n(4)isomers of glucose that differ in configuration at carbon one (C-l)<\/strong>
\nAns.<\/strong>(4) Anomer is specific example of stereoisomer. Carbon atom at position 1 is anomeric.<\/p>\n

12.The pyrimidine bases present in DNA are (2006)<\/strong>
\n(1)cytosine and adenine<\/strong>
\n(2)cytosine and guanine<\/strong>
\n(3)cytosine and thymine<\/strong>
\n(4)cytosine and uracil<\/strong>
\nAns.<\/strong>(3) DNA has two pyrimidine bases. Thymine and cytosine.<\/p>\n

13.The secondary structure of a protein refers to<\/strong>
\n(1)a -helical backbone<\/strong>
\n(2)hydrophobic interactions<\/strong>
\n(3)sequence of a-amino acids <\/strong>
\n(4)fixed configuration of the polypeptide back\u00adbone<\/strong>
\nAns.<\/strong>(1) Secondary structure of proteins involves a-helical back bond and R-sheet structures, These structures are formed as a result of l Hydrogen bonding between different peptide groups in the molecule.<\/p>\n

\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-14\"
\nAns.<\/strong>
\n\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-14\"<\/p>\n

15.Bakelite is obtained from phenol by reacting with (2008)<\/strong>
\n1) (CH2<\/sub>OH)2<\/sub> 2) CH3CHO<\/strong>
\n3) CH3<\/sub>COCH3<\/sub> 4) HCHO<\/strong>
\nAns.<\/strong>
\n\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-15\"<\/p>\n

\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-16\"
\nAns.<\/strong>
\n\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-16\"<\/p>\n

\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-17\"
\nAns.<\/strong>(3) Carbohydrates are polyhydroxy carbonyl compounds.<\/p>\n

\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-18\"
\nAns.<\/strong>(3) Carbohydrates are polyhydroxy carbonyl compounds.<\/p>\n

19.Biuret test is not given by (2010)<\/strong>
\n1) carbohydrates 2) polypeptides<\/strong>
\n3) urea 4) proteins<\/strong>
\nAns.<\/strong>(1) Biuret is a test characteristic of amide linkage. Urea also has amide linkage like proteins.<\/p>\n

20.The polymer containing strong intermolecular forces e.g. hydrogen bonding, is (2010)<\/strong>
\n1) teflon 2) nylon 6,6<\/strong>
\n3) polystyrene 4) natural rubber<\/strong>
\nAns.<\/strong>
\n\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-20\"<\/p>\n

21.The presence or absence of hydroxy group on which carbon atom of sugar differentiates RNA and DNA ? (2011)<\/strong>
\n1) 3rd<\/sup> 2) 4th<\/sup> 3) 1st<\/sup> 4) 2nd<\/sup><\/strong>
\nAns.<\/strong>
\n\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-21\"
\n\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-21-1\"<\/p>\n

22.Which of the following compounds can be detected by Molish\u2019s test ? (2012)<\/strong>
\n1)Nitro Compounds 2) Sugars<\/b>
\n3) Amines 4) Primary alcohols<\/strong>
\nAns.<\/strong>(2) Molish test for carbohydrates : when a drop or two drops of alcoholic solution of oc- naphthol is added to sugar solution and then cone. H2<\/sub>S04<\/sub> is added along the sides of test tube, formation of violet ring at the junction of two liquids conforms the sugar.<\/p>\n

\"jee-main-previous-year-papers-questions-with-solutions-chemistry-biomolecules-and-polymers-23\"
\nAns.<\/strong>(3) Lewis acids can initiate the cationic polymerisation.<\/p>\n

24.Which one of the following statements is correct ? (2012)<\/strong>
\n(1)All amino acids except lysine are optically active<\/strong>
\n(2)All amino acids are optically active<\/strong>
\n(3)All amino acids except glycine are optically active<\/strong>
\n(4)All amino acids except glutamic acids are optically <\/strong>active<\/b>
\nAns.<\/strong>(3) Lewis acids can initiate the cationic polymerisation.<\/p>\n

25.Synthesis of each molecule of glucose in photosynthesis involves (2013)<\/strong>
\n1) 18 molecules of ATP 2) 10 molecules of ATP<\/strong>
\n3) 8 molecules of ATP 4) 6 molecules of ATP<\/strong>
\nAns.<\/strong>1) Eighteen ATP units.<\/p>\n

26.Which one is classified as a condensation polymer ? (2014)<\/strong>
\n1) Acrylonitrile 2) Dacron<\/strong>
\n3) Neoprene 4) Teflon<\/strong>
\nAns.<\/strong>(2) Dacron is the condensation polymer Neoprene, teflon and acrylonitrile are addition polymers.<\/p>\n

27.Which one of the following bases is not present in DNA ? (2014)<\/strong>
\n1) Thymine 2) Quinoline<\/strong>
\n3) Adenine 4) Cytosine<\/strong>
\nAns.<\/strong>(2) Quinoline is the base which is not present in DNA.<\/p>\n

28.Which polymer is used in the manufacture of paints and lacquers ? (2015)<\/strong>
\n1) Bakelite 2) Glyptal<\/strong>
\n3) Polypropene 4) Poly vinyl chloride<\/strong>
\nAns.<\/strong>(2) Uses of polymer glyptal.<\/p>\n

29.Which of the vitamins given below is water soluble ? (2015)<\/strong>
\n1) Vitamin C 2) Vitamin D<\/strong>
\n3) Vitamin E 4) Vitamin K<\/strong>
\nAns.<\/strong>(1) Vitamin B and Vitamin C are water soluble.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

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