JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

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Q.51. Major product of the following reaction is:    (2019)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans.
(4)
Mechanism for the formation of major product is as follows:
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.52. The increasing order of pKa of the following amino acids in aqueous solution is:    (2019)
Gly, Asp, Lys, Arg
(1) Asp < Gly < Arg < Lys
(2) Gly < Asp < Arg < Lys
(3) Asp < Gly < Lys < Arg
(4) Arg < Lys < Gly < Asp
Ans. 
(3)
Structure of the given a-amino acids are:
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Here, aspartic acid is an acidic and glycine is a neutral amino acid while lysine and arginine are basic amino acids. Also, arginine is more basic due to the stronger basic functional groups.
∴ The order of pKa value is directly proportional to the basic strength of amino acids, i.e. Arg > Lys > Gly > Asp.

Q.53. The correct sequence of amino acids present in the tripeptide given below is:    (2019)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(1) Val-Ser-Thr
(2) Thr - Ser - Val
(3) Leu - Ser - Val
(4) Thr - Ser - Leu
Ans.
(1)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.54. The correct structure of product ‘P’ in the following reaction is:    (2019)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans.
(2)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Q.55. The major product of the following reaction is:    (2019)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans.
(1)
Reaction involved:
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.56. Which of the following tests cannot be used for identifying amino acids?    (2019)
(1) Biuret test
(2) Barfoed test
(3) Ninhydrin test
(4) Xanthoproteic test
Ans.
(2)
Barfoed test is used to test the reducing nature of sugar (carbohydrate).

Q.42. Among the following compounds, which one is found in RNA?    (2019)
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans. 
(2)
R.N.A contains uracil
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.57. The homopolymer formed from 4-hydroxy-butanoic acids is:    (2019)
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans.
(4)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.58. The correct match between Item I and Item II is:    (2019)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(1) (A) → (Q, R); (B) → (S); (C) → (P)
(2) (A) → (R);    (B) → (Q); (C) → (P)
(3) (A) → (R);    (B) → (S); (C) → (Q)
(4) (A) → (Q);   (B) → (S); (C) → (R)
Ans.
(1)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.59. Among the following compounds most basic amino acid is:    (2019)
(1) Asparagine
(2) Lysine
(3) Serine
(4) Histidine
Ans.
(2)

Q.60. Poly- β -hydroxybutyrate-co- β -hydroxy valerate (PHBV) is a copolymer of____.    (2019)
(1) 3-Hydroxybutanoic acid and 4-Hydroxypentanoic acid
(2) 2-Hydroxybutanoic acid and 3-Hydroxypentanoic acid
(3) 3-Hydroxybutanoic acid and 2-Hydroxypentanoic acid
(4) 3-Hydroxybutanoic acid and 3-Hydroxypentanoic acid
Ans. 
(4)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.61. The correct structure of histidine in a strongly acidic solution (pH = 2) is:    (2019)
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans.
(3)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.62. The two monomers for the synthesis of nylon 6, 6 are:    (2019)
(1) HOOC(CH2)4COOH, H2N (CH2)6NH2
(2) HOOC(CH2)6COOH, H2N (CH2)6NH2
(3) HOOC(CH2)4COOH, H2N (CH2)4NH2
(4) HOOC(CH2)6COOH, H2N (CH2)4NH2
Ans.
(1)
Adipic acid (having 6C) and hexamethylene diamine (having 6C).

Q.63. Maltose on treatment with dilute HCl gives:    (2019)
(1) D-Glucose and D-Fructose
(2) D-Fructose
(3) D-Galactose
(4) D-Glucose
Ans.
(4)
Hydrolysis of maltose with dilute HCL gives only D-glucose.

Q.64. The structure of Nylon-6 is:    (2019)
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans.
(3)
Nylon-6 is prepared from caprolactum.
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.65. Fructose and glucose can be distinguished by:    (2019)
(1) Benedict's test
(2) Fehling's test
(3) Barfoed’s test
(4) Seliwanoffs test
Ans.
(4)
Seliwanoff’s test is used to distinguish aldose and ketose sugars.

Q.66. The major product of the following reaction is:    (2019)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans.
(4)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.67. Which of the following statements is not true about sucrose?    (2019)
(1) It is a non reducing sugar.
(2) The glycosidic linkage is present between C1 of α-glucose and C1 of β-fructose.
(3) It is also named as invert sugar.
(4) On hydrolysis, it produces glucose and fructose.
Ans. 
(2)
Sucrose contains glycosidic link between Cof α-D glucose and C2 of β-D-fructose.
C12H22O11 + H2O → Glucose + Fructose
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.68. The peptide that gives positive ceric ammonium nitrate and carbylamine tests is:    (2019)
(1) Ser-Lys
(2) Gin-Asp
(3) Lys-Asp
(4) Asp-Gln
Ans.
(1)
Ceric ammonium nitrate test is given by alcohol. Only serine(ser) contains - OH group.

Q.69. Which of the following compounds is a constituent of the polymer JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev    (2019)
(1) N-Methyl urea
(2) Formaldehyde
(3) Methylamine
(4) Ammonia
Ans. (2)
The polymer JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev is urea-formaldehyde resin.
Its monomers are urea and formaldehyde.

Q.70. Amylopectin is composed of:
(1) α - D - glucose, C1 - C4 and C1 - C6 linkages
(2) β - D - glucose, C1 - C4 and C2 - C6 linkages
(3) β - D - glucose, C1 - C4 and C1 - C6 linkages
(4) α - D - glucose, C1 - C4 and C2 - C6 linkages
Ans.
(1)
Starch is a polymer of α-D-glucose. It has two components.
(i) Amylose which has only α-1, 4-glycosidic linkage and is a linear polymer.
(ii) Amylopectin which has α-1, 6-glycosidic linkage in addition to α-1, 4-glycosidic linkage and is a cross-linked polymer.

Q.71. Which of the following is a condensation polymer?    (2019)
(1) Buna-S
(2) Neoprene
(3) Teflon
(4) Nylon 6, 6
Ans.
(4)
Nylon -6,6 is obtained by condensation polymerisation of hexamethylenediamine and adipic acid.
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
So, nylon-6, 6 is a condensation polymer. Other given polymers are addition polymers.

Q.72. The correct match between Item - I and Item - II is:    (2019)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(1) (a) → (IV), (b) → (II), (c) → (I) ,(d) → (III)
(2) (a) → (II), (b) → (IV), (c) → (I), (d) → (III)
(3) (a) → (III), (b) → (I), (c) → (II), (d) → (IV)
(4) (a) → (III), (b) →  (I), (c) → (IV), (d) → (II)
Ans.
(4)
a. HDPE -  Ziegler-Natta catalyst
b. Polyacrylonitrile - Peroxide catalyst
c. Novolac - Catalysed by acid or base
d. Nylon-6 - Condensation at high T and P

Q.73. Which of the following is a thermosetting polymer?    (2019)
(1) Bakelite
(2) Buns-N
(3) Nylon 6
(4) PVC
Ans.
(1)
Bakelite is an example of thermosetting polymer, PVC and Nylon 6 are thermoplastic and Buna-N is an elastomer.

Q.74. Glucose and Galactose are having identical configuration in all the positions except position.    (2019)
(1) C-3
(2) C-4
(3) C-2 
(4) C-5
Ans. 
(2)
Galactose and glucose are C4 epimers.
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.75. Which of the following statements is not true about RNA?    (2019)
(1) It controls the synthesis of protein.
(2) It has always double stranded a-helix structure.
(3) It usually does not replicate.
(4) It is present in the nucleus of the cell.
Ans.
(2)
RNA has a single helix structure, whereas, DNA has a double helix structure.

Q.76. Which of the given statements is INCORRECT about glycogen?    (2019)
(1) It is a straight chain polymer similar to amylose.
(2) Only a-linkages are present in the molecule.
(3) It is present in animal cells.
(4) It is present in some yeast and fungi.
Ans. 
(1)
Structure of glycogen is similar to amylopectin.
It is found in yeast and fungi and stored in animal body. It contains α-glycosidic linkages.

Q.77. The correct name of the following polymer is:    (2019)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(1) Polyisobutane
(2) Polytert-butylene
(3) Polyisoprene
(4) Polyisobutylene
Ans.
(4)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev 

Q.78. The correct match between Item-I and Item-II is:    (2019)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(1) A → R; B → P; C → S; D → Q
(2) A → Q; B → S; C → P; D → R
(3) A → R; B → S; C → P; D → Q
(4) A → Q; B→ P; C → S; D → R
Ans.
(3)
As chloroxylenol contains phenolic group so it gives positive ferric chloride test.
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Norethindrone has double bond, thus it will give Bayer’s test.
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Sulphapyridine contains -NH2 group so it gives carbylamine test.
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Penicillin contains -COOH group so it will give sodium hydrogen carbonate (NaHCO3) test.
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.79. The correct match between item (I) and item (II) is:    (2019)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(1) (A) → (Q); (B) → (R); (C) → (S)
(2) (A) → (Q); (B) → (P); (C) → (R)
(3) (A) → (R); (B) → (P); (C) → (S)
(4) (A) → (R); (B) → (P); (C) → (R)
Ans.
(2)
(A) Norethindrone - Antifertility (Q)
(B) Ofloxacin - Antibiotics (P)
(C) Equanil - used for hypertension (R)

Q.80. The correct match between Item I and Item II is:    (2019)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(1) (A) → (R); (B) → (P); (C) → (Q); (D) → (S)
(2) (A) → (P); (B) → (R); (C) → (Q); (D) → (S)
(3) (A) → (R); (B) → (P); (C) → (S); (D) → (Q)
(4) (A) → (P); (B) → (R); (C) → (S); (D) → (Q)
Ans. 
(1)
Allosteric → Molecule bind to a site other than the active site of enzyme
Competitive → Molecule bind to the active site inhibitor of enzyme
Receptor → Molecule crucial for communication in the body.
Poison → Molecule binding to the enzyme covalently

Q.81. The correct statement(s) among I to III with respect to potassium ions that are abundant within the cell fluids is/are:
I. They activate many enzymes
II. They participate in the oxidation of glucose to produce ATP
III. Along with sodium ions, they are responsible for the transmission of nerve signals    (2019)
(1) I and II only
(2) I and III only
(3) I, II and III
(4) III only
Ans.
(3)
K+ ions are the most abundant cations within cell fluids, where they activate many enzymes, participate in the oxidation of glucose to form ATP and, along with sodium ions, they are responsible for the transmission of nerve signals.

Q.82. Noradrenaline is a/an:    (2019)
(1) Antacid
(2) Neurotransmitter
(3) Antidepressant
(4) Antihistamine
Ans. 
(2)
Noradrenaline, also called Norepinephrine, is neurotransmitter.

Q.83. The predominant form of histamine present in human blood is (pka , Histidine = 6.0)    (2018) 
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans.
(4)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
The N-atoms present in the ring will have same pKa values (6.0), while N atom outside the ring will have different pKa value (pKa > 7.4)
Therefore, two N-atoms inside the ring will remain in unprotonated form in human blood because their pKa(6.0) < pH of blood (7.4), while the N-atom outside the ring will remain in protonated form because its pKa > pH of blood (7.4).

Q.84. Glucose on prolonged heating with HI gives:    (2018)
(1) n-Hexane 
(2) 1-Hexane 
(3) Hexanoic acid 
(4) 6-iodohexanal 
Ans. (1)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev 

Q.85. Which of the following will not exist in zwitter ionic form at pH =7?    (2018)
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans. (4)
The N atom of amide is not basic

Q.86. The copolymer formed by addition polymerization of styrene and acrylonitrile in the presence of peroxide is:    (2018)
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans. (4)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(C6H8)n − (C3H3N)m 

Q.87. Which of the following is the correct structure of Adenosine?    (2018)
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans. (3)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.88. Among the following, the incorrect statement is:    (2018)
(1) Cellulose and amylose has 1, 4-glycosidic linkage. 
(2) Lactose contains β-D-galactose and β-D-glucose. 
(3) Maltose and lactose has 1, 4-glycosidic linkage. 
(4) Sucrose and amylose has 1, 2-glycosidic linkage. 
Ans. (4)
In amylose 1, 4 α-glycosidic linkage is present. 

Q.89. The correct match between items of List-I and List-II is:    (2018)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRevJEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(1) (A)-(S), (B)-(R), (C)-(Q), (D)-(P) 
(2) (A)-(R), (B)-(S), (C)-(P), (D)-(Q) 
(3) (A)-(R), (B)-(S), (C)-(Q), (D)-(P) 
(4) (A)-(S), (B)-(R), (C)-(P), (D)-(Q) 
Ans. (2)
→ Phenelzine contains hydrazine
→ Chloroxylenol contains phenol
→ Uracil is the pyrimidine base
→ Ranitidine contains furan ring 


Q.90. The formation of which of the following polymers involves hydrolysis reaction?    (2017)
(1) Nylon 6 
(2) Bakelite 
(3) Nylon 6, 6 
(4) Terylene 
Ans. (1)
Caprolactum is hydrolysed to produce caproic acid which undergoes condensation to produce Nylon-6. 
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.91. Which of the following compounds will behave as a reducing sugar in an aqueous KOH solution?    (2017)
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans. (1)
Sugars in which there is free anomeric –OH group are reducing sugars 
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.92. Among the following, the essential amino acid is:    (2017)
(1) Valine 
(2) Alanine 
(3) Serine 
(4) Aspartic acid
Ans. (1)

Q.93. Identify the pollutant gases largely responsible for the discoloured and lustreless nature of marble of the Taj Mahal.    (2017)
(1) SO2 and O3
(2) O3 and CO2
(3) SO2 and NO2
(4) CO2 and NO2
Ans.
(3)

Q.94. The reason for “drug induced poisoning” is:    (2017)
(1) Binding irreversibly to the active site of the enzyme
(2) Binding at the allosteric sites of the enzyme
(3) Binding reversibly at the active site of the enzyme
(4) Bringing conformational change in the binding site of enzyme

Ans. (2)
The reason for "drug induced poisoning" is the binding of drug, irreversibly, to the active site of the enzyme. If this happens, then body degenerates the enzyme and releases a new enzyme.

Q.95. Which of the following is a biodegradable polymer?    (2017)
(1) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(2) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(3) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(4) JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
Ans.
(2)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.96. The incorrect statement among the following is:    (2017)
(1) α-D-glucose and β-D-glucose are enantiomers.
(2) The penta acetate of glucose does not react with hydroxyl amine.
(3) α-D-glucose and β-D-glucose are anomers.
(4) Cellulose is a straight chain polysaccharide made up of only β-D-glucose units.
Ans.
(1)
α-D-Glucose and β-D-glocose are anomer not enantiomer.

Q.97. Which of the following is a set of green house gases?    (2017)
(1) O3, NO2, SO2, Cl2
(2) CH4, O3, N2, SO2
(3) CO2, CH4, N2O, O3
(4) O3, N2, CO2, NO2
Ans.
(3)

Q.98. The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration of:    (2016)
(1) Fluoride
(2) Lead
(3) Nitrate
(4) Iron
Ans.
(3)
Fluoride - 1000 ppm
Lead - 40 ppm
Nitrate - 100 ppm
[> 40 ppm gives blue baby syndrome disease.]
Iron - 0.2 ppm

Q.99. Which of the following statements about low density polythene is FALSE?    (2016)
(1) Its synthesis requires high pressure.
(2) It is a poor conductor of electricity.
(3) Its synthesis requires dioxygen or a peroxide initiator as a catalyst.
(4) It is used in the manufacture of buckets, dust-bins etc.
Ans.
(2)
High density polythene is used in the manufacture of housewares like buckets, dustbins, bottles, pipes etc. Low density polythene is used for insulating electric wires and in the manufacture of flexible pipes, toys, coats, bottles etc.

Q.100. Thiol group is present in:    (2016)
(1) Cytosine 
(2) Cystine 
(3) Cysteine
(4) Methionine
Ans.
(3)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.101. Which of the following is an anionic detergent?    (2016)
(1) Sodium stearate
(2) Sodium lauryl sulphate
(3) Cetyltrimethyl ammonium bromide
(4) Glyceryl oleate
Ans. 
(4)
Sodium lauryl sulphate (C11H23CH2OSO-3Na+) is an anionic detergent. Glyceryl oleate is a glyceryl ester of oleic acid. Sodium stearate (C17H35COO-Na+) is a soap. Cetyltrimethyl ammonium bromide JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev is a cationic detergent.

Q.102. The hottest region of Bunsen flame shown in the figure below is:    (2016)  
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
(1) region 1 
(2) region 2
(3) region 3
(4) region 4
Ans.
(2)
Region - 2 → blue flame

Q.103. BOD stands for:    (2016)
(1) Biochemical Oxygen Demand
(2) Biochemical Oxidation Demand
(3) Biological Oxygen Demand
(4) Bacterial Oxidation Demand
Ans.
(1)
BOD stands for Biochemical oxygen demand.

Q.104. Identify the incorrect statement regarding heavy water:    (2016)
(1) It reacts with CaC2 to produce C2D2 and Ca(OD)2.
(2) It is used as a coolant in nuclear reactors.
(3) It reacts with Al4C3 to produce CD4 and Al(OD)3.
(4) It reacts with SO3 to form deuterated sulphuric acid (D2SO4).
Ans.
(2)
Heavy water (D2O) acts as moderator used to slow down the speed of neutrons in nuclear reactor, hence option (2) is incorrect.

Q.105. Consider the following sequence for aspartic acid:    (2016)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
The pl (isoelectric point) of aspartic acid is:
(1) 5.74
(2) 3.65
(3) 2.77
(4) 1.88
Ans.
(3)
In given reaction sequence
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev
= 2.765 = 2.77.

Q.106. Assertion : Rayon is a semisynthetic polymer whose properties are better than natural cotton.    (2016)
Reason : Mechanical and aesthetic properties of cellulose can be improved by acetylation.
(1) Both assertion and reason are correct, and the reason is the correct explanation for the assertion.
(2) Both assertion and reason are incorrect.
(3) Assertion is incorrect statement, but the reason is correct.
(4) Both assertion and reason are correct, but the reason is not the correct explanation for the assertion.
Ans. 
(1)
Rayon is prepared by acetylation of cellulose.

Q.107. The most appropriate method of making egg-albumin sol is:    (2016)
(1) Keep the egg in boiling water for 10 minutes. After removing the shell, transfer the yellow part of the content to 100 mL of 5% w/V saline solution and homogenize with a mechanical shaker.
(2) Break an egg carefully and transfer the transparent part of the content to 100 mL of 5% w/V saline solution and stir well.
(3) Keep the egg in boiling water for 10 minutes. After removing the shell, transfer the white part of the content to 100 mL of 5% w/V saline solution and homogenize with a mechanical shaker.
(4) Break an egg carefully and transfer only the yellow part of the content to 100 mL of 5% w/V saline solution and stir well.
Ans.
(2)
Only the transparent part of egg has albumin.

Q.108. The artificial sweetener that has the highest sweetness value in comparison to cane sugar is:    (2016)
(1) Saccharin
(2) Sucralose
(3) Alitame
(4) Aspartane
Ans.
(3)
Alitame is 2000 times sweeter than sucrose.

Q.109.  Which of the following polymers is synthesized using a free radical polymerization technique?    (2016)
(1) Teflon
(2) Melamine polymer
(3) Nylon 6, 6
(4) Terylene
Ans.
(1)
JEE Main Previous year questions (2016-20): Carbohydrates, Amino Acids, Polymers & Miscellaneous- 2 Notes | EduRev

Q.110. Which one of the following substances used in dry cleaning is a better strategy to control environmental pollution?    (2016)
(1) Nitrogen dioxide
(2) Sulphur dioxide
(3) Tetrachloroethylene
(4) Carbon dioxide
Ans. 
(4)
All other gases are itself environmental pollutant.

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