JEE Advanced · Chemistry · 10. Hydrogen
LIST-I contains compounds and LIST-II contains reactions
| List - I | List - II |
| (I) \(H _2 O _2\) | (P) \(Mg \left( HCO _3\right)_2+ Ca\) \((OH)_2 \rightarrow\) |
| (II) \(Mg ( OH )_2\) | (Q) \(BaO _2+ H _2 SO _4 \rightarrow\) |
| (III) \(BaCl _2\) | (R) \(Ca \left( OH _2\right) 2\) \(+ MgCl _2 \rightarrow\) |
| (IV) \(CaCO _3\) | (S) \(BaO _2+ HCl \rightarrow\) |
| (T) \(Ca \left( HCO _3\right)_2\) \(+ Ca ( OH )_2\) |
- A
- B
- C
- D
Answer & Solution
Correct Answer
(D)
Step-by-step Solution
Detailed explanation
In this method calculated amount of lime is added to hard water. It precipitates out calcium carbonate and magnesium hydroxide which can be filtered off
(P) \(Mg \left( HCO _3\right)_2+2 Ca ( OH )_2 \longrightarrow 2 CaCO _3 \downarrow+\) \(Mg ( OH )_2 \downarrow+2 H _2 O\)
(T) \(Ca \left( HCO _3\right)_2+ Ca ( OH )_2 \longrightarrow 2 CaCO _3 \downarrow\) \(+~2 H _2 O\)
(R) \(Ca ( OH )_2+ MgCl _2 \longrightarrow Mg ( OH )_2+ CaCl _2\) Acidifying barium peroxide and removing excess water by evaporation under reduced pressure gives hydrogen peroxide
(P) \(Mg \left( HCO _3\right)_2+2 Ca ( OH )_2 \longrightarrow 2 CaCO _3 \downarrow+\) \(Mg ( OH )_2 \downarrow+2 H _2 O\)
(T) \(Ca \left( HCO _3\right)_2+ Ca ( OH )_2 \longrightarrow 2 CaCO _3 \downarrow\) \(+~2 H _2 O\)
(R) \(Ca ( OH )_2+ MgCl _2 \longrightarrow Mg ( OH )_2+ CaCl _2\) Acidifying barium peroxide and removing excess water by evaporation under reduced pressure gives hydrogen peroxide
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