Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AIIMS 2015
Exam
AIIMS
Year
2015
Subject
Chemistry
Chapter
Surface Chemistry

AIIMS 2015 · Chemistry · Surface Chemistry

Assertion: Fe^ 3+ can be used for coagulation of As_2 ~S_3 sol....

Assertion: Fe3+\mathrm{Fe}^{3+} can be used for coagulation of As2 S3\mathrm{As}_2 \mathrm{~S}_3 sol. Reason: Fe3+\mathrm{Fe}^{3+} reacts with As2 S3\mathrm{As}_2 \mathrm{~S}_3 to give Fe2 S3\mathrm{Fe}_2 \mathrm{~S}_3.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIfboth assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

C. If assertion is true but reason is false.

Step-by-step solution

Fe3+\mathrm{Fe}^{3+} is positively charged whereas As2 S3\mathrm{As}_2 \mathrm{~S}_3 is negatively charged sol. Their charges are neutralised on mixing hence, mutual precipitation (coagulation) occurs.
Practice Surface Chemistry on Quantrex Academy →

More from Surface Chemistry

Which of the following is a positively charged sol? NEET 2023Pumice stone is an example of NEET 2023Which one is an example of heterogenous catalysis? NEET 2023Shown below are adsorption isotherms for a gas ' X ' at temperatures T_1, ~T_2 and T_3… NEET 2022Given below are two statements : Statement I : In the coagulation of a negative sol, the… NEET 2022The right option for the statement "Tyndall effect is exhibited by", is: NEET 2021Measuring Zeta potential is useful in determining which property of colloidal solution? NEET 2020In which of the sols, the colloidal particles are with negative charge? NEET 2020 Full Surface Chemistry list All AIIMS PYQs