NCERT CLASS-7

NCERT Solutions For Class 7 Science Chapter 18 Exercise Chapter 18 – Wastewater Story 1. Fill in the blanks: (a) Cleaning of water is a process of removing ____________. (b) Wastewater released by houses is called ____________. (c) Dried ____________ is used as manure. (d) Drains get blocked by ____________ and ____________. Solution: (a) Cleaning … Read more