Question

Hard water does not give lather with soap due to the presence of which ions?

A Na⁺ and K⁺
B Mg²⁺ and Ca²⁺
C Cl⁻ and SO₄²⁻
D Fe²⁺ and Zn²⁺
Practice Next

Hey! Ask a query

🎓
Think You're Ready for RBI Grade B?
RBI Grade B 2026 Phase 1 Memory Based Paper
  • 200 Questions with Detailed Solutions
  • Section-wise Coverage (GA, English, Quant & Reasoning)