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Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous


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39 Questions MCQ Test Chemistry for JEE | Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous

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Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 1

Polymer formation from monomers starts by [2002]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 1

Polymerisation starts either by conden sation or addition reactions between monomers. Condensation polymers are formed by the combination of monomers with the elimination of simple molecules.Where as the addition polymers are formed by the addition together of the molecules of the monomer or monomers to form a large molecule without elimination of any thing.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 2

RNA is different from DNA because RNA contains

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 2

In RNA, the sugar is D–ribose and base is uracil where as in DNA, the sugar is D-2 de oxyribose and the nitrogenous base is thymine.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 3

The compound   is used as [2002]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 3

The given compound is aspirin which is antipyretic and analgesic

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 4

Which of the following could act as a propellant for rockets?

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 4

Liquid hydrogen and liquid oxygen are used as excellent fuel for rockets. H2(ℓ) has low mass and high enthalpy of combustion whereas oxygen is a strong supporter of combustion.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 5

Nylon threads are made of [2003]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 5

Nylon is a polyamide polmer.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 6

Complete hydrolysis of cellulose gives [2003]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 6

Cellulose is a linear polymer of β –D– glucose in which C1 of one glucose unit is connected to C4 of the other through β–D glucosidic linkage. It does not undergo hydrolysis easily. However on heating with dilute H2SO4 under pressure. It does undergo hydrolysis to give only D– glucose.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 7

The reason for double helical structure of DNA is operation of[2003]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 7

DNA consists of two polynucleotide chains, each chain forms a right handed spiral with ten bases in one turn of the spiral. The two chains coil to double helix and run in opposite direction held together by hydrogen bonding.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 8

Which base is present in RNA but not in DNA ?

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 8

RNA contains cytosine and uracil as pyrimidine bases while DNA has cytosine and thymine.
Both have the same purine bases i.e., Guanine and adenine.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 9

Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories ? [2004]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 9

Insulin is a bioch emically active peptide harmone secreted by pancreas.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 10

The smog is essentially caused by the presence of

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 10

 Photochemical smog is caused by oxides of sulphur and nitrogen.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 11

Which of the following is a polyamide? [2005]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 11

Nylon-66 is a polyamide of hexamethylene diamine (CH2)6(NH2)2 and adipic acid (CH2)4(COOH)2.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 12

Which one of the following types of drugs reduces fever ?

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 12

An antipyretic is a drug which is responsible for lowering the temperature of the feverish organism to normal but has  no effect on normal temperature states

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 13

In both DNA and RNA, heterocylic base and phosphate ester linkages are at – [2005]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 13

In DNA and RNA heterocyclic base and phosphate ester are at C1' and C5' respectively of the sugar molecule.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 14

Which of the following is fully fluorinated polymer? [2005]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 14

Teflon is polymer of CF2 = CF2.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 15

The term anomers of glucose refers to [2006]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 15

Cyclization of th e open ch ain str ucture of D-(+)-glucose has created a new stereocenter at C1 which explains the existence of two cyclic forms of D-(+)-glucose, namely α– and β–. These two cyclic forms are diasteromers, such diastereomers which differ only in the configuration of chiral carbon developed on hemiacetal formation (it is C1 in glucose and C2 in fructose) are called anomers and the hemiacetal carbon (C1 or C2) is called the anomeric carbon.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 16

The pyrimidine bases present in DNA are [2006]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 16

The pyrimidine bases present in DNA are cytosine and thymine.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 17

The secondary structure of a protein refers to [2007]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 17

The secondary structure of a protein refers to the shape in which a long peptide chain can exist. There are two different conformations of the peptide linkage present in protein, these are α-helix and β-conformation. The α-helix always has a right handed arrangement. In β-conformation all peptide chains are streched out to nearly maximum extension and then laid side by side and held together by intermolecular hydrogen bonds.
The structure resembles the pleated folds of drapery and therefore is known as β-pleated sheet.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 18

Identify the wrong statement in the following: [2008]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 18

NOTE : Ozone layer acts as a shield and does not allow ultraviolet radiation from sun to reach earth. It does not prevent infra-red radiation from sun to reach earth.
Thus option (c) is wrong statement and so it is the correct answer.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 19

Bakelite is obtained from phenol by reacting with

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 19

Bakelite is formed by the reaction of formaldehyde (HCHO) and phenol so the correct answer is (d).

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 20

α - D-(+)-glucose and β-D-(+)-glucose are [2008]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 20

Since α - D - (+)- glucose and β - D - (+) glucose differ in configuration at C – 1 atom so they are anomers.
NOTE : Anomers are those diastereomers that differ in configuration at C – 1 atom. i.e.,  (c) in the correct answer.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 21

Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 21

The cross linked polymers will be formed by RSiCl3

The correct choice is (c)

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 22

Buna-N synthetic rubber is a copolymer of : [2009]  

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 22

Buna – N is a copolymer of butadiene (CH2 = CH – CH = CH2) and acrylonitrile (CH2 = CHCN).

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 23

The two functional groups present in a typical carbohydrate are:[2009]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 23

NOTE : Glucose is considered as a typical carbohydrate which contains –CHO and –OH group.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 24

Biuret test is not given by [2010]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 24

Biuret test produces violet colour on addition of dilute CaSO4 to alkaline solution of a compound containing peptide linkage.
Polypeptides, proteins and urea have  (peptide) linkage while carbohydrates have glycosidic llinkages. So, test of carbohydtrates should be different from that of other three.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 25

The polymer containing strong intermolecular forces e.g. hydrogen bonding, is [2010]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 25

Nylon 6-6 has amide lin kage capable of forming hydrogen bon ding.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 26

The presence or absence of hydroxyl group on which carbon atom of sugar differentiates RNA and DNA? [2011]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 26

RNA has D (–) - Ribose and the DNA has 2–Deoxy D (–) – ribose as the carbohydrate unit.

 

From the structures it is clear that 2nd carbon in DNA do not have OH group.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 27

Which of the followin g compoun ds ca n be detected by Molisch's Test? [2012]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 27

Molisch's Test : This is a general test for carbohydrates.
One or two drops of alcoholic solution of a-naphthol is added to 2 ml glucose solution. 1 ml of conc. H2SO4 solution is added carefully along the sides of the testtube. The formation of a violet ring at the junction of two liquids confirms the presence of a carbohydrate or sugar.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 28

The species which can best serve as an initiator for the cationic polymerization is : [2012]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 28

Lewis acids are the most common compounds used for initiation of cationic polymerisation. The more popular Lewis acids are SnCl4, AlCl3, BF3 and TiCl4.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 29

Which one of the following statements is correct? [2012]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 29

With the exception of glycine all the 19 other common amino acids have a uniquely different functional group on the central tetrahedral alpha carbon.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 30

Aspirin is known as : [2012]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 30

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 31

Synthesis of each molecule of glucose in photosynthesis involves : [JEE M 2013]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 31

6CO2 + 12NADPH + 18ATP → C6H12O6 + 12NADP + 18ADP

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 32

Which one is classified as a condensation polymer? [JEE M 2014]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 32

Except Dacron all are additive polymers. Terephthalic acid condenses with ethylene glycol to give Dacron.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 33

Which one of the following bases is not present in DNA? [JEE M 2014]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 33

DNA contains ATGC bases So quinoline is not present in DNA.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 34

Which of the vitamins given below is water soluble ? [JEE M 2015]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 34

Water-soluble vitamins dissolve in water and are not stored by the body. The water soluble vitamins include the vitamin B-complex group and vitamin C.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 35

Which of the following compounds is not an antacid ? [JEE M 2015]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 35

Phenelzin e is an an tidepr essan t, wh ile others ar e antacids.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 36

Which polymer is used in the manufacture of paints and lacquers ? [JEE M 2015]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 36

Glyptal is used in the manufacture of paints and lacquers.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 37

The concentr ation of fluoride, lead, nitr ate 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 : [JEE M 2016]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 37

The maximum limit of nitrate in drinking water is 50 ppm. Excess nitrate in drinking water can cause disease such as methemoglobinemia ('blue baby' syndrome).

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 38

Which of the followin g is an anionic detergent? [JEE M 2016]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 38

Sodium lauryl sulphate (C11H23CH2OSO3Na+) is an anionic detergent. Glyceryl oleate is a glyceryl ester of oleic acid. Sodium stearate (C17H35COONa+) is a soap.
Cetyltrimethyl ammonium bromide  is a cationic detergent.

Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 39

Which of the following statements about low density polythene is FALSE? [JEE M 2016]

Detailed Solution for Test: 35 Year JEE Previous Year Questions: Carbohydrates, Amino Acids, Polymers & Miscellaneous - Question 39

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.

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