Question : Which of the following metal salts is responsible for permanent hardness in water?
Option 1: KCl
Option 2: Nacl
Option 3: Ca(HCO3)2
Option 4: CaCl2
New: SSC CHSL Tier 2 answer key released | SSC CHSL 2024 Notification PDF
Recommended: How to crack SSC CHSL | SSC CHSL exam guide
Don't Miss: Month-wise Current Affairs | Upcoming government exams
Correct Answer: Ca(HCO 3 ) 2
Solution : The correct option is Ca(HCO 3 ) 2.
The presence of bicarbonates of calcium and magnesium causes water to become temporarily hard, but the presence of soluble chlorides and sulphates of calcium and magnesium causes permanent hardness. Calcium bicarbonate, also called calcium hydrogen carbonate, has the chemical formula Ca(HCO 3 ) 2 .
Related Questions
Know More about
Staff Selection Commission Combined High ...
Result | Eligibility | Application | Admit Card | Answer Key | Preparation Tips | Cutoff
Get Updates Brochure
Your Staff Selection Commission Combined Higher Secondary Level Exam brochure has been successfully mailed to your registered email id “”.
Upcoming Exams
Trending Articles around SSC CHSL
