Polymers & Everyday Chemistry · JEE Main previous year questions

2019 12 questions

1. Q842019 · 12 Apr 2019 · Shift 1

   Which of the following is a thermosetting polymer?

   1. A.Buna-N
   2. B.PVC
   3. C.NyIon6
   4. D.Bakelite
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   Answer: D

2. Q882019 · 12 Apr 2019 · Shift 2
   
   1. A.Polytert-butylene
   2. B.Polyisobutane
   3. C.Polyisobutylene
   4. D.Polyisoprene
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   Answer: C

3. Q902019 · 10 Apr 2019 · Shift 1

   Which of the following is a condensation polymer?

   1. A.Neoprene
   2. B.Buna-S
   3. C.Nylon 6, 6
   4. D.Teflon
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   Answer: C

4. Q882019 · 10 Apr 2019 · Shift 2

   The correct match between Item-I and Item-II is : $$\begin{array}{llll}& \text{Item - I}& & \text{Item - II}\\ \text{(a)}& \text{High density polythene}& \text{(I)}& \text{Peroxide catalyst}\\ \text{(b)}& \text{Polyacrylonitrile}& \text{(II)}& \text{Condensation at high temperature \& pressure}\\ \text{(c)}& \text{Novolac}& \text{(III)}& \text{Ziegler-Natta Catalyst}\\ \text{(d)}& \text{Nylon 6}& \text{(IV)}& \text{Acid or base catalyst}\end{array}$$

   1. A.$\text{(a)}\to \text{(IV)},\text{(b)}\to \text{(II)},\text{(c)}\to \text{(I)},\text{(d)}\to \text{(III)}$
   2. B.$\text{(a)}\to \text{(III)},\text{(b)}\to \text{(I)},\text{(c)}\to \text{(IV)},\text{(d)}\to \text{(II)}$
   3. C.$\text{(a)}\to \text{(II)},\text{(b)}\to \text{(IV)},\text{(c)}\to \text{(I)},\text{(d)}\to \text{(III)}$
   4. D.$\text{(a)}\to \text{(III)},\text{(b)}\to \text{(I)},\text{(c)}\to \text{(II)},\text{(d)}\to \text{(IV)}$
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   Answer: B

5. Q692019 · 9 Apr 2019 · Shift 1
   
   1. A.
   2. B.
   3. C.
   4. D.
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   Answer: D

6. Q902019 · 9 Apr 2019 · Shift 2
   
   1. A.N-Methyl urea
   2. B.Ammonia
   3. C.Formaldehyde
   4. D.Methylamine
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   Answer: C

7. Q852019 · 8 Apr 2019 · Shift 2

   The structure of Nylon-6 is :

   1. A.${\left[(\mathrm{C}{\mathrm{H}}_2{)}_4-\stackrel{\mathrm{O}}{\stackrel{\Vert }{\mathrm{C}}}-\stackrel{\mathrm{H}}{\stackrel{|}{\mathrm{N}}}\right]}_{\mathrm{n}}$
   2. B.${\left[\stackrel{\mathrm{O}}{\stackrel{\Vert }{\mathrm{C}}}-(\mathrm{C}{\mathrm{H}}_2{)}_6-\stackrel{\mathrm{H}}{\stackrel{|}{\mathrm{N}}}\right]}_{\mathrm{n}}$
   3. C.${\left[\stackrel{\mathrm{O}}{\stackrel{\Vert }{\mathrm{C}}}-(\mathrm{C}{\mathrm{H}}_2{)}_5-\stackrel{\mathrm{H}}{\stackrel{|}{\mathrm{N}}}\right]}_{\mathrm{n}}$
   4. D.${\left[(\mathrm{C}{\mathrm{H}}_2{)}_6-\stackrel{\mathrm{O}}{\stackrel{\Vert }{\mathrm{C}}}-\stackrel{\mathrm{H}}{\stackrel{|}{\mathrm{N}}}\right]}_{\mathrm{n}}$
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   Answer: C

8. Q862019 · 12 Jan 2019 · Shift 1

   Poly $\beta$–hydroxybutyrate-co-$\beta$-hydroxyvalerate (PHBV) is a copolymer of

   1. A.2-hydroxybutanoic acid and 3-hydroxypentanoic acid
   2. B.3-hydroxybutanoic acid and 2-hydroxypentanoic acid
   3. C.3-hydroxybutanoic acid and 3-hydroxypentanoic acid
   4. D.3-hydroxybutanoic acid and 4-hydroxypentanoic acid
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   Answer: C

9. Q862019 · 12 Jan 2019 · Shift 2

   The two monomers for the synthesis of Nylon 6, 6 are

   1. A.$\mathrm{HOOC}(\mathrm{C}{\mathrm{H}}_2{)}_6\mathrm{COOH},{\mathrm{H}}_2\mathrm{N}(\mathrm{C}{\mathrm{H}}_2{)}_4\mathrm{N}{\mathrm{H}}_2$
   2. B.$\mathrm{HOOC}(\mathrm{C}{\mathrm{H}}_2{)}_4\mathrm{COOH},{\mathrm{H}}_2\mathrm{N}(\mathrm{C}{\mathrm{H}}_2{)}_6\mathrm{N}{\mathrm{H}}_2$
   3. C.$\mathrm{HOOC}(\mathrm{C}{\mathrm{H}}_2{)}_4\mathrm{COOH},{\mathrm{H}}_2\mathrm{N}(\mathrm{C}{\mathrm{H}}_2{)}_4\mathrm{N}{\mathrm{H}}_2$
   4. D.$\mathrm{HOOC}(\mathrm{C}{\mathrm{H}}_2{)}_6\mathrm{COOH},{\mathrm{H}}_2\mathrm{N}(\mathrm{C}{\mathrm{H}}_2{)}_6\mathrm{N}{\mathrm{H}}_2$
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   Answer: B

10. Q902019 · 11 Jan 2019 · Shift 2
    
    1. A.
    2. B.
    3. C.
    4. D.
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    Answer: C

11. Q832019 · 9 Jan 2019 · Shift 1
    
    1. A.
    2. B.
    3. C.
    4. D.
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    Answer: D

12. Q862019 · 9 Jan 2019 · Shift 1

    Correct statements among a to d regarding silicones are : (a)   They are polymers with hydrophobic character. (b)   They are biocompatible. (c)   In general, they have high thermal stability and low dielectric strength. (d)   Usually, they are resistant to oxidation and used as greases.

    1. A.(a), (b), (c) and (d)
    2. B.(a), (b) and (c) only
    3. C.(a) and (b) only
    4. D.(a), (b) and (d) only
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    Answer: D