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Assertion: In the iodometric titration, ...

Assertion`:` In the iodometric titration, starch is used as an indicator.
Reason `:` Starch is a polysaccharide.

A

If both the assertion and reacons are true and reason is a true explanation of the assertion.

B

If both the assertion and reasons are true but the reason is not the correct explanation of assertion.

C

If the assertion is ture but reason is false.

D

If assertion is false but reasion is true.

Text Solution

Verified by Experts

The correct Answer is:
B
Starch `(C_(6)H_(10)O_(5))_(n)` is a polysaccharide. It consists of two fractions `-` one is known as `alpha-`amylose or amylopectin. In iodimetric and iodometric titrations, starch solution is used as an indicator . It gives blue or violet colour with free iodine. At the end point, the blue or violet colour disappears when iodine is completely changed to iodide.
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Knowledge Check

  • Assertion : In iodometic titrations, starch is used as an indicator. Reason : Starch is a polysaccharide.

    A
    Assertion and reason both are correct statements and reason is correct explanation for assertion.
    B
    Assertion and reason both are correct statements but reason is not correct explanation for assertion.
    C
    Assertion is correct statement but reason is wrong statement.
    D
    Assertion is wrong statement but reason is correct statement.

  • Assertion in the iiodometirc titration starch is used as an indicator Reason starch is polysacharide

    A
    If both assertion and reasn are true and reason is the true explanation of the assertion
    B
    If both assertion and reason are true but reason is not the true explanation of the assertion
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false

  • Assertion in the iiodometirc titration starch is used as an indicator Reason starch is polysacharide

    A
    If both assertion and reasn are true and reason is the true explanation of the assertion
    B
    If both assertion and reason are true but reason is not the true explanation of the assertion
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false