General Science - Physics (Basics)
Which of the following substances is commonly used to soften hard water?
Which of the following substances is commonly used to soften hard water?
easy Q2 of 15
Step-by-Step Solution
Step 1: Understand water softening agents
Hard water contains calcium and magnesium salts; washing soda is used to remove these ions and soften water.Step 2: Analyze the options
Washing soda (sodium carbonate) precipitates calcium and magnesium ions; bleaching powder is a disinfectant; sodium chloride and calcium carbonate do not soften water.Final Answer:
Washing soda → Option BQuick Check:
Water softener = Washing soda ✅
Quick Trick: Washing soda removes hardness by precipitating calcium ions.
Common Mistakes:
MISTAKES- Confusing bleaching powder or salt as water softeners.
Master "Physics (Basics)" in General Science
Start learning the concept with an interactive lesson.
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore General Science Quizzes