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(A) : The gross mobility of elastomer ch...

(A) : The gross mobility of elastomer chain is its special characteristics
(R) : It contains a network of cross link

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

(A) is false but (R) is true

Text Solution

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The correct Answer is:
D
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Passage-III : The binary compounds of oxygen with other elements are called oxides. They are classified either depending upon their acid - base characteristics or on the basis of oxygen content. a ) Normal oxides : These oxides which contain oxygen atoms as permitted by the normal oxidation number, i.e., -2. Normal oxide may be acidic, basic, amphoteric or neutral. b) Polyoxides : The oxides which contain oxygen atoms different than those permitted by the normal oxidation number of -2. i) Peroxides : Two oxygen atoms are linked to each other and oxygen has -I oxidation number. They contain (O-O)^(2) unit. ii) Superoxides : These oxides contain (O-O)^(-1) units, i.e., each O-atom has oxidation number -1//2 . c ) Suboxides : These contain low content of oxygen than expected. d) Mixed oxides : These oxides are made of two simpler oxides. Which of the following pairs contains mixed oxides?

Passage-III : The binary compounds of oxygen with other elements are called oxides. They are classified either depending upon their acid - base characteristics or on the basis of oxygen content. a ) Normal oxides : These oxides which contain oxygen atoms as permitted by the normal oxidation number, i.e., -2. Normal oxide may be acidic, basic, amphoteric or neutral. b) Polyoxides : The oxides which contain oxygen atoms different than those permitted by the normal oxidation number of -2. i) Peroxides : Two oxygen atoms are linked to each other and oxygen has -I oxidation number. They contain (O-O)^(2) unit. ii) Superoxides : These oxides contain (O-O)^(-1) units, i.e., each O-atom has oxidation number -1//2 . c ) Suboxides : These contain low content of oxygen than expected. d) Mixed oxides : These oxides are made of two simpler oxides. Which of the following pairs contains neutral oxides ?

Passage-III : The binary compounds of oxygen with other elements are called oxides. They are classified either depending upon their acid - base characteristics or on the basis of oxygen content. a ) Normal oxides : These oxides which contain oxygen atoms as permitted by the normal oxidation number, i.e., -2. Normal oxide may be acidic, basic, amphoteric or neutral. b) Polyoxides : The oxides which contain oxygen atoms different than those permitted by the normal oxidation number of -2. i) Peroxides : Two oxygen atoms are linked to each other and oxygen has -I oxidation number. They contain (O-O)^(2) unit. ii) Superoxides : These oxides contain (O-O)^(-1) units, i.e., each O-atom has oxidation number -1//2 . c ) Suboxides : These contain low content of oxygen than expected. d) Mixed oxides : These oxides are made of two simpler oxides. Which of the following oxides is paramagnetic in nature?

Passage-III : The binary compounds of oxygen with other elements are called oxides. They are classified either depending upon their acid - base characteristics or on the basis of oxygen content. a ) Normal oxides : These oxides which contain oxygen atoms as permitted by the normal oxidation number, i.e., -2. Normal oxide may be acidic, basic, amphoteric or neutral. b) Polyoxides : The oxides which contain oxygen atoms different than those permitted by the normal oxidation number of -2. i) Peroxides : Two oxygen atoms are linked to each other and oxygen has -I oxidation number. They contain (O-O)^(2) unit. ii) Superoxides : These oxides contain (O-O)^(-1) units, i.e., each O-atom has oxidation number -1//2 . c ) Suboxides : These contain low content of oxygen than expected. d) Mixed oxides : These oxides are made of two simpler oxides. Which pair of species is referred to as suboxides?

(A) Insulin contains two peptide chains. (R) Insulin is an example of dipeptide.

(A) Melamine polymers are used to prepare unbreakable crockery items. (R) Melamine polymers are cross linked polymers.

(A) Study of emission spectra of a material can serve as a finger print for identification of the material. (R) Every element has its characteristic spectrum of emission.

AAKASH SERIES-POLYMERS-Level - I (Exercise - II) (Assertion (A) & Reason (R) type questions)
  1. (A) : Teflon has high thermal stability and chemical inertness (R) :...

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  2. (A) : The gross mobility of elastomer chain is its special characteris...

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  3. (A) : Natural rubber is an addition polymer. (R) : Natural rubber ha...

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  4. (A) : Natural rubber is elastic and non-cryslalline. (R) : Weak vand...

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  5. (A) Polypropylene is an addition polymer (R) : Polypropylene is poly...

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  6. (A) : Polybutadiene is an example of chain growth polymer (R) : In c...

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  7. (A) The polymerization of propylene is carried out in presence of SnCl...

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  8. (A) : Most of the polymeric materials are non biodegradable (R) : Bu...

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  9. (A) : Cellulose acetate and cellulose nitrate are used in textiles bec...

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  10. (A) : Styrene is more reactive than propene towards cationic polymeriz...

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  11. (A) : Bakelite is copolymer (R) : Bakelite is a thermosetting materi...

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  12. (A) : Glyptal is obtained by the condensation polymerization of ethyle...

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  13. (A) : Novac is heated in presence of hexamethyl tetramine to form hard...

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  14. (A) : Nylon 6,6 is a fibre. Because (R) : It is an addition polymer

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  15. (A) Nylon - 6,6 is classified as a condensation heteropolymer. (R) :...

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  16. (A) : Bakelite is thermosetting polymer. (R) : Bakelite has three di...

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  17. (A) : Natural rubber is a polymer of cis-isoprene (R) : Poly trans i...

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  18. (A) : The vulcanised rubber has greater elasticity and tensile strengt...

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  19. (A) : Addition of CH(3)COOH and HCOOH electrolytes causes coagulation ...

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  20. (A) : Osmotic pressure method is the most suitable method to determine...

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