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(A) Teflon is used in nonstick cookwere ...

(A) Teflon is used in nonstick cookwere
(R) Teflon is resistant to attack by corrosive reagent.

A

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

B

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

C

(A) is true but (R) is false

D

Both (A) and (R) are false

Text Solution

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The correct Answer is:
A
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The oxidation of aryl methyl or cyclo alkyl methyl by the treatment with chromyl chloride to an aldehyde via the formation of esters is known as Etard reaction. The oxidation stops at aldehyde stage because the product of the reaction is acylal, R - CH(OCOCH_3)_2 which is resistance to oxidation with this reagent. The acylal on hydrolysis gives aldehyde. What is the product obtained when ethyl benzene is subjected to Etard reaction ?

The oxidation of aryl methyl or cyclo alkyl methyl by the treatment with chromyl chloride to an aldehyde via the formation of esters is known as Etard reaction. The oxidation stops at aldehyde stage because the product of the reaction is acylal, R - CH(OCOCH_3)_2 which is resistance to oxidation with this reagent. The acylal on hydrolysis gives aldehyde. Which of the other reactions will produce benzaldehyde ?

The oxidation of aryl methyl or cyclo alkyl methyl by the treatment with chromyl chloride to an aldehyde via the formation of esters is known as Etard reaction. The oxidation stops at aldehyde stage because the product of the reaction is acylal, R - CH(OCOCH_3)_2 which is resistance to oxidation with this reagent. The acylal on hydrolysis gives aldehyde. Which of the following compounds give benzo-phenone upon treating with Cr O_2 Cl_2 ?

AAKASH SERIES-POLYMERS-OBJECTIVE EXERCISE - 4
  1. (A) Benzoyl peroxide can initiate free radical polymerisation. (R) ...

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  2. (A) Ethylene can not be prepared by anionic polymerisation. (R) Eth...

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  3. (A) Teflon is used in nonstick cookwere (R) Teflon is resistant to a...

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  4. (A) Condensation polymeristion is called step growth polymerisation. ...

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  5. (A) Nylon-6 is condensation homo polymer. (R) Nylon-6 is a fibre.

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  6. (A) Dacron is used as reinforcing material in safety helmets. (R) Da...

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  7. (A) Novolac is a linear polymer. (R) Bakelite is obtained from novol...

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  8. (A) Melamine is a thermosetting polymer (R) Melamine is a condensati...

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  9. (A) Melamine polymers are used to prepare unbreakable crockery items. ...

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  10. (A) Vulcanised Rubber suits industry than natural Rubber. (R) Elasti...

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  11. (A) Rubber latex is colloidal dispersion in water with negatively char...

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  12. (A) Ebonite contain a high percentage of sulphur. (R) Ebonite is a h...

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  13. (A) The process of vulcanization can be accelerated by Zno or zinc ace...

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  14. (A) Position of double bond in poly isoprene can be detected by ozonol...

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  15. (A) Neoprene is a synthetic Rubber. (R) Neoprene is obtained from ch...

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  16. (A) The P.D.I of synthetic polymer is greater than one. (R) Syntheti...

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  17. (A) P.H.B.V is used in spaciality packing. (R) P.H.B.V is a Biodegra...

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  18. (A) Biodegradable polymers are ecofriendly. (R) Biodegradable polyme...

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  19. (A) Poly glycolic acid is used as post operative sutures. (R) Poly g...

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  20. (A) Poly vinyl pyrrolidone is an addition homo polymer. (R) Poly vin...

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