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Polymers Class 12th

Kindly go through the questions

Monomer of orlon is

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Vishal Baghel

Contributor-Level 10

Monomer of orlon is acrylonitrile CN

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Polymers Class 12th

Kindly go through the questions

Monomer of orlon is

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New answer posted

2 weeks ago

Polymers Class 12th

Le tf(x) be a polynomial of degree 6 in x, in which the coefficient of x⁶ is unity and it has extrema at x = -1 and x = 1. If $\underset{x \to 0}{l i m} \frac{f (x)}{x^{3}} = 1,$ then 5 f(2) is equal to……………….

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Vishal Baghel

Contributor-Level 10

Let f (x) = x⁶ + ax⁵ + bx⁴ + ax³ + dx² + ex + f

$\underset{x \to 0}{l i m} \frac{f (x)}{x^{3}} = 1$ Non zero finite

So, d = e = f = 0

f (x) = x⁶ + ax⁵ + bx⁴ + cx³

$\underset{x \to 0}{l i m} \frac{f (x)}{x^{3}} = 1$ Non zero finite

f' (x) = $6 x^{5} + 5 a x^{4} + 4 b x^{3} + 3 x^{2}$

f' (1) = 0

6 + 5a + 4b + 3 = 0

5a + 4b = - 9 . (i)

f' (-1) = 0

-6 + 5a – 4b + 3 = 0 . (ii)

Solving (i) and (ii)

a -3/5, b = -3/2

$∴ f (x) = x^{6} + (\frac{- 3}{5}) x^{5} + (\frac{- 3}{2}) x^{4} + x^{3}$

$∴ 5 . f (2) = 144$

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Polymers Class 12th

Match List with List II.

List I List II

(Monomer Unit)

...more

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Vishal Baghel

Contributor-Level 10

Kindly consider the following figure

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New answer posted

2 weeks ago

Polymers Class 12th

Let f(x) and g(x) be two real polynomials of degree 2 and 1 respectively. If $f (g (x)) = 8 x^{2} - 2 x,$ and $g (f (x)) = 4 x^{2} + 6 x + 1,$ then the value of f(2) + g(2) is…………….

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Vishal Baghel

Contributor-Level 10

$f (x) = a x^{2} + b x + c$

g (x) = px + q

$f (g (x)) = a {(p x + q)}^{2} + b (p) (+ q) + c$

$? 8 x^{2} ? 2 x = a {(p x + q)}^{2} + b (p x + q) + c$

Compare 8 = ap² …………… (i)

-2 = a (2pq) + bp

0 = aq² + bq + c

$9 (f (x)) = p (a x^{2} + b x + c) + q$

=>4x² + 6x + 1 = apx² + bpx + cp + q

=> Andhra Pradesh = 4 ……………. (ii)

6 = bp

1 = cp + q

From (i) & (ii), p = 2, q = -1

=> b = 3, c = 1, a = 2

f (x) = 2x² + 3x + 1

f (2) = 8 + 6 + 1 = 15

g (x) = 2x – 1

g (2) = 3

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Polymers Class 12th

Given below are two statements : one is labelled as Assertion A and the other is 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 options given below.

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Vishal Baghel

Contributor-Level 10

Kindly consider the following figure

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2 weeks ago

Polymers Class 12th

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

Choose the correct answer form given options below:

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alok kumar singh

Contributor-Level 10

Buna-S is the copolymer of butadiene and styrene, Nylon-6, 6 is the condensation polymer of adipic acid and diamine and having fibrous nature.

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Polymers Class 12th

Which one of the following is NOT a copolymer?

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Raj Pandey

Contributor-Level 9

Copolymer is the polymer formed by two or more monomers having multiple bonds.

Buna – S, PHBV and butadiene – styrene are copolymers. Neoprene is homopolymer.

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Polymers Class 12th

Given below are two statements : one is labelled as Assertion A and the other is 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 options given below.

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alok kumar singh

Contributor-Level 10

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New question posted

3 weeks ago

Polymers Class 12th

Nylon-66 is obtained by condensation polymerization of-

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