JEE · NEET Previous Year Question
Calgonis used for water treatment. Which of the following statement is NOT true about calgon?
Topic: JEE PYQ
Answer: A. Full step-by-step solution below.
- ACalgon contains the most abundant element by weight in the earth's crust.
- BIt is also known as Graham's salt.
- CIt is polymeric compound and is water soluble.
- DIt doesnot remove Cat ion by precipitation.
Correct answer: A
Solution
(a) JEE Main 2021or
Order of abundance of element in earth crust is
O > Si > Al > Fe > Ca > Na > Mg > K
So second most abundant element in earth crust is Si not Ca.
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