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(A): Fructose gives positive Tollen's te...

(A): Fructose gives positive Tollen's test.
(R) : Fructose is a Ketose.

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

Verified by Experts

The correct Answer is:
B
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Fructose contains

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Fructose reduces Tollen's reagent due to

(A) Fructose is the sweetest naturally occuring sugar. (R) Fructose is a functional isomer of glucose.

(A) Fructose has ketone group and does not reduce Tollen's reagent. (R) Fructose in Haworth structure has SiX membered ring.

Fructose gives the silver mirror test because it

(A) Glucose and fructose give the same osazone. (R) Glucose and fructose have same configu- ration at C_y, C_4 and C_5

Write notes on fructose

AAKASH SERIES-BIOMOLECULES-OBJECTIVE EXERCISE-4 (ASSERTION (A) & REASON (R) TYPE QUESTIONS :)
  1. (A) Reduction of glucose with sodium borohydride gives sorbitol. (R)...

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  2. (A) Glucose and fructose give the same osazone. (R) Glucose and fruc...

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  3. (A): Fructose gives positive Tollen's test. (R) : Fructose is a Keto...

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  4. (A) Cane sugar undergoes inversion in aqueous solution. (R) Cane sug...

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  5. (A) C6 H(10) O5 is a carbohydrates. (R) Most of the carbohydrates ha...

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  6. (A) Lactose is a reducing sugar. (R) Lactose contains glucose and ga...

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  7. (A) Lactose is a reducing Sugar (R) Lactose if formed by glucosidic ...

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  8. (A) D-Glucose and D-Mannose form identical osazone on reaction with ex...

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  9. (A) Sucrose is reducing sugar where as maltose is non-reducing sugar. ...

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  10. (A) Glucose gives a reddish-brown ppt with Fehling's solution. (R) R...

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  11. (A) Sucrose is a non-reducing carbohydrate. (R) In sucrose both the ...

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  12. (A) Glycogen is known as animal starch. (R) The structure of glycoge...

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  13. (A) Acetic acid fit into Cx(H2O)y gneral formula of carbohydrates. ...

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  14. (A) Honey has been used for a long time as an instant source of energy...

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  15. (A) Starch gives blue colour with iodine. (R) Starch form complex wi...

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  16. (A) DNA stores all the hereditary information of a biological species....

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  17. (A) 2-deoxyribose is reducing sugar. (R) 2-deoxyribose is constituen...

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  18. (A) Guanine unites with Cytosine but not with Thymine. (R) Guanine a...

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  19. (A) Adenine pairs up with thymine but not with cytosine. (R) With cy...

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  20. (A) The pyrimidine base thymine is present in RNA. (R) DNA controls ...

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