Question

Assertion (A): Cations adsorbed on soil colloids determine aggregate formation.
Reason (R): Cations form electropositive links between electronegative soil particles.

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is NOT the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

Divalent cations improve soil aggregation by neutralizing colloid charges.

Answer 1

The Correct Option is A

Cations (like Ca\textsuperscript{2+}, Mg\textsuperscript{2+}) bridge negative charges on colloids and help flocculate soil particles into aggregates.