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NEETChemistrySurface Chemistry

Assertion:- Animal skins are colloidal in nature Reason:- Animal skin has positively charged particles.

Options

  1. AAssertion is true. Reason is true and Reason is the correct explanation for Assertion
  2. BAssertion is true. Reason is true but Reason is not the correct explanation for Assertion
  3. CAssertion is true but Reason is false
  4. DAssertion is false but Reason is true

Correct answer

B. Assertion is true. Reason is true but Reason is not the correct explanation for Assertion

Step-by-step solution

The sol particles acquire positive or negative charge by preferential adsorption of positive or negative ions. Animal hides are colloidal in nature. When a hide, which has positively charged particles, is soaked in tannin, which contains negatively charged colloidal particles, mutual coagulation takes place. This results in the hardening of leather. This process is termed as tanning.

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