निम्नलिखित डेटा एक सीवेज नमूने से संबंधित हैं: प्रारंभिक DO = 10 mg/L अंतिम DO = 2 mg/L तनुकरण (Dilution) = 1% दिए गए सीवेज नमूने की जैव रासायनिक ऑक्सीजन मांग (BOD) कितनी है?

Which of the following statements is correct regarding the lime-soda ash process of water softening?

If the total hardness and alkalinity of a sample of water are 300 mg/L and 100 mg/L (as CaCO3 scale) respectively, then its carbonate and non-carbonate hardness (in units of mg/L) will be respectively: