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JEE Mains | PYQ

Which of the following is NOT a natural polymer?

In polymer Buna-S : ‘S’ stands for:

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Match the following.

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Glycosidic linkage between \( C_1 \) of \( \alpha \)-glucose and \( C_2 \) of \( \beta \)-fructose is found in:

Given below are two statements, one is Assertion (A) and other is Reason (R).
Assertion (A) : Natural rubber is a linear polymer of isoprene called cis-polyisoprene with elastic properties.
Reason (R) : The cis-polyisoprene molecules consist of various chains held together by strong polar interactions with coiled structure.
In the light of the above statements, choose the correct one form the options given below:

Which is true about Buna-N?

is a repeating unit for:

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L-isomer of a compound ‘A’ \( \mathrm{(C_4H_8O_4)} \) gives a positive test with \( [\mathrm{Ag(NH_3)_2}]^{+} \). Treatment of ‘A’ with acetic anhydride yields triacetate derivative. Compound ‘A’ produces an optically active compound (B) and an optically inactive compound (C) on treatment with bromine water and \( \mathrm{HNO_3} \) respectively. Compound (A) is:

Match List I with List II

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Match List \(-\) I with List \(-\) II:

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Monomer of Novolac is:

Which one of the following compounds will liberate \( \mathrm{CO_2} \) when treated with \( \mathrm{NaHCO_3} \)?

Polymer used in orlon is:

Which of the following is not an example of a condensation polymer?

A biodegradable polyamide can be made from:

Which among the following is not a polyester?

Given below are two statements:
Statement I: Ethene at \( 333 \) to \( 343 \, \text{K} \) \( 6\text{-}7 \, \text{atm} \) pressure in the presence of \( \text{AlEt}_3 \) and \( \text{TiCl}_4 \) undergoes addition polymerization to give LDP.
Statement II: Caprolactam at \( 533\text{-}543 \, \text{K} \) in \( \text{H}_2\text{O} \) through step growth polymerizes to give Nylon \( 6 \)
In the light of the above statements, choose the correct answer from the options given below:

The polymer formed on heating Novolac with formaldehyde is:

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Which one of the following is NOT a copolymer?

Melamine polymer is formed by the condensation of:

Buna-S can be represented as:

The Novolac polymer has mass of \( 963 \, \text{g} \). The number of monomer units present in it are ___________.

Bakelite is a cross-linked polymer of formaldehyde and:

In alanylglycylleucylalanylvaline, the number of peptide linkages is __________.

The polymer, which can be stretched and retains its original status on releasing the force is:

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Vulcanization of rubber is carried out by heating a mixture of

Fructose is an example of :

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A polysaccharide 'X' on boiling with dil \( \mathrm{H_2SO_4} \) at \( 393 \, \text{K} \) under \( 2\text{-}3 \, \text{atm} \) pressure yields 'Y'. 'Y' on treatment with bromine water gives gluconic acid. 'X' contains \( \beta \)-glycosidic linkages only. Compound 'X' is:

Monomer units of Dacron polymer are:

Orlon fibres are made up of:

The polymer \( X \) - consists of linear molecules and is closely packed. It is prepared in the presence of triethylaluminium and titanium tetrachloride under low pressure. The polymer \( X \) is:

Which of the following sets are correct regarding polymer?

(a) Copolymer: Buna-S     (b) Condensation polymer: Nylon-\( 6, 6 \)

(c) Fibres: Nylon-\( 6, 6 \)     (d) Thermosetting polymer: Terylene

(e) Homopolymer: Buna-N

Match List I with List II.

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Match List I with List II

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Given below are two statements: one is labelled as Assertion A and the other labelled as Reason R.
Assertion A: Dacron is an example of polyester polymer.
Reason R: Dacron is made up of ethylene glycol and terephthalic acid monomers.
In the light of the above statements, choose the most appropriate answer from the option given below:

Caprolactam when heated at high temperature in presence of water, gives:

Correct statements regarding alkyl halides \( (\mathrm{R}-\mathrm{X}) \) among the following are:

A. Alcohol being less polar solvent as compared to water, alcoholic \( \mathrm{KOH} \) favours elimination reaction with \( \mathrm{R}-\mathrm{X} \).

B. Order of reactivity towards \( \mathrm{S_{N}1} \) mechanism is \( \mathrm{C_6H_5-CH_2-Cl} > \mathrm{C_6H_5-CHCl-C_6H_5} \).

C. Non substituted aryl halides exhibit properties similar to alkyl halides.

D. Vinyl chloride is an example of haloalkene and allyl chloride is an example of haloalkyne.

E. \( \mathrm{R-Cl} \) can be prepared by reacting \( \mathrm{R-OH} \) with \( \mathrm{SOCl_2} \) but \( \mathrm{Ar-Cl} \) cannot be prepared by reacting \( \mathrm{Ar-OH} \) with \( \mathrm{SOCl_2} \).

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Which of the following is an example of polyester?