Rain water is generally—

এই অধ্যায়ের আরও প্রশ্ন

• C-09-Q194Sources of water pollution include—
• C-09-Q195Heavy metals that may pollute water and cause cancer include—
• C-09-Q196Excessive extraction of sub-surface water by shallow pumps causes—
• C-09-Q197The element arsenic in drinking water is—
• C-09-Q198Pure water is—
• C-09-Q199Water with pH—
• C-09-Q200The temperature range typical of summer water (without heat pollution) is—
• C-09-Q201Heat pollution of water occurs when—
• C-09-Q202BOD stands for—
• C-09-Q203COD stands for—