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Alveoli

Assertion :Al...

Question

Assertion :Alum is used to stop blood from a cut. Reason: Blood is negative sol and sol particles are coagulated more efficiently by $A l^{3 +}$ ions.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Alum is used to stop blood from a cut. It acts as a hemostatic agent, allowing the blood clot to form. The high ionic strength promotes flocculation of the blood and the astringent chemical causes local vasoconstriction. Thus, blood is negative sol and sol particles are coagulated more efficiently by $A l^{3 +}$ ions.

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Similar questions

Assertion

Lithium sulphate does not form alums.

Reason

$L i^{+}$ is too small to form a stable lattice required for double-salt/alum formation.

H_{2}

H e

(1 + \frac{P b}{R T})

H_{2}

H e

y = A sin (k x - ω t)

x = 0

y -

x -

{SiO}_{2}

{CaCO}_{3}

CaO

{CaCO}_{3}

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Assertion: Be and Al have similar properties.

Reason: $B e^{2 +}$ and $A l^{3 +}$ have nearly the same charge/volume ratios and similar polarising power.

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