See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Meq. of NaOH 2 3 1 1 Meq. of Na CO 15 2 20    Meq. of NaOH 2 3 1 Meq. of Na CO 20 20    Meq. of NaOH  1 30 20 20   W 1000