Friday , January 28 2022


9th Science Mid Term Exam Question Paper (2019-20)

Science Solved Sample Paper

9th Science Mid Term Exam: Question Paper (2019-20) School Name: Himalayan Public School, Sector 13, Rohini, Delhi 110085 India Time: 3 hours Marks: 80 Date: 13/09/2019 Class: IX Subject: Science General Instructions: Section A: 9th Science Mid Term Exam Question: 1. During summer, water kept in earthen pot become cool due to phenomenon …

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Wastewater Story: 7th Class NCERT CBSE Science Ch 18

7th Class CBSE Science NCERT Book

Wastewater Story 7th Class NCERT CBSE Science Chapter 18 Question: Wastewater is fit for human consumption or not. Give reason to support your answer. Answer: No, because it is dirty and has many diseases causing organisms like cholera, typhoid etc. Question: Name two chemicals used to disinfect wastewater. Answer: Chlorine and ozone …

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