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Study the given statements and select th...

Study the given statements and select the correct answer.
(i) Cellulose is a homospolymer of glucose.
(ii) Inulin is a homopolymer of fructose.
(iii) Starch gives blue colour and glycogen gives red colour with iodine solution.
(iv) Cellulose gives no colour with iodine solution.

A

Statements (i), (ii) and (iii) are correct.

B

Statements (i),(ii) and (iv) are correct.

C

Statements (ii) and (iii) are correct.

D

All statements are correct.

Text Solution

Verified by Experts

The correct Answer is:
D
Starch can hold `I_(2)` (iodine) molecules in the helical portion. The starch-`I_(2)` is blue in colour. Cellulose does not contain complex helices and hence cannot hold `I_(2)` and hence remain colourless.
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Knowledge Check

  • Iodine gives blue colour with

    A
    `Cl_2`
    B
    `F_2`
    C
    Starch solution
    D
    `FeCl_2` solution

  • Sodium gives blue colour in NH_(3) solution. This blue colour is due to

    A
    ammoniated `Na^(+)`
    B
    `ammoniated Na^(-)`
    C
    ammoniated `e^(-)`
    D
    `Na^(+)//N^(-)` pair.

  • Diphenylamine reagent gives a deep blue colour with a solution. It contains

    A
    `Sn^(2+)`
    B
    `NO_(2)^(-)`
    C
    `NO_(3)^(-)`
    D
    `Fe^(3+)`

    • Similar Questions

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    Diphenylamine reagent gives a deep blue colour with a solution. It contains

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    A solution gives yellow colour with orange, methyl red and phenol red. What is the pH of the solution ?

    Which of the following carbohydrates gives a dark blue colour with iodine?

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