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(A) : Teflon has high thermal stability ...

(A) : Teflon has high thermal stability and chemical inertness
(R) : Teflon is a thermoplastic

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:
B
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Passage - I : A yellow powder 'x' is burnt in a steam of Fluorine to obtain a colourless gas 'y' which is thermally stable and chemically inert its molecule has octahedral geometry another colourless gas 'z' with same constituent atoms as that of 'y' is obtained when sulphur dichloride is heated with sodium fluoride. It's molecule has trigonal bi-pyramidal geometry The yellow powder 'x' is

Passage - I : A yellow powder 'x' is burnt in a steam of Fluorine to obtain a colourless gas 'y' which is thermally stable and chemically inert its molecule has octahedral geometry another colourless gas 'z' with same constituent atoms as that of 'y' is obtained when sulphur dichloride is heated with sodium fluoride. It's molecule has trigonal bi-pyramidal geometry The colourless gas 'y' is

Passage - I : A yellow powder 'x' is burnt in a steam of Fluorine to obtain a colourless gas 'y' which is thermally stable and chemically inert its molecule has octahedral geometry another colourless gas 'z' with same constituent atoms as that of 'y' is obtained when sulphur dichloride is heated with sodium fluoride. It's molecule has trigonal bi-pyramidal geometry The colourless gas 'z' is

(A) : Any part of the solution has identical chemical and physical properties (R): Solution is always a homogenous mixture

The order of thermal stability of carbonates of HA group is

The heavier members of 13 and 14 groups besides the group oxidation state also show another oxidation state which is two unit less than the group OS. Down the group decreasing, the stability state of higher OS increasing , and that of lower OS increasing. The concept which is commonly called inert pair effect has been used to explain many physical and chemical properties of the element of these groups. Which among the following is the strongest oxidising agent ?

The heavier members of 13 and 14 groups besides the group oxidation state also show another oxidation state which is two unit less than the group OS. Down the group decreasing, the stability state of higher OS increasing , and that of lower OS increasing. The concept which is commonly called inert pair effect has been used to explain many physical and chemical properties of the element of these groups. Which among the following is the strongest reducing agent ?

The heavier members of 13 and 14 groups besides the group oxidation state also show another oxidation state which is two unit less than the group OS. Down the group decreasing, the stability state of higher OS increasing , and that of lower OS increasing. The concept which is commonly called inert pair effect has been used to explain many physical and chemical properties of the element of these groups. Heavier members of group 13 exhibit oxidation state.

(A) : Temperatures near the sea coast are moderate. ( R) : Water has a high thermal conductivity.

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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