JEE Main 2020 — S Block Elements Question with Solution
From: JEE Main 2020 (Online) 6th September Evening Slot
Question
Match the following compounds (Column-I) with
their uses (Column-II) :
| S.No. | Column-I | S.No. | Column-II |
|---|---|---|---|
| (I) | Ca(OH)2 | (A) | casts of statues |
| (II) | NaCl | (B) | white wash |
| (III) | CaSO4, H2O | (C) | antacid |
| (IV) | CaCO3 | (D) | washing soda
preparation |
Choose an option
Show full solutionCorrect option: B
Correct answer
B(I)-(B), (II)-(D), (III)-(A), (IV)-(C)
Step-by-step explanation
(I) Ca(OH)2
is used in white wash due to its disinfectant nature.
(II) NaCl is used in preparation of washing soda(Na2CO3).
(1) 2NH3 + H2O + CO2 (NH4 )2CO3
(2) (NH4 )2CO3 + H2O + CO2 2NH4HCO3
(3) NH4HCO3 + NaCl NH4Cl + NaHCO3
(4) 2NaHCO3 Na2CO3 + CO2 + H2O
(III) CaSO4.H2O (Plaster of Paris) Used for making casts of statues.
(IV) CaCO3 is used as an Antacid.
(II) NaCl is used in preparation of washing soda(Na2CO3).
(1) 2NH3 + H2O + CO2 (NH4 )2CO3
(2) (NH4 )2CO3 + H2O + CO2 2NH4HCO3
(3) NH4HCO3 + NaCl NH4Cl + NaHCO3
(4) 2NaHCO3 Na2CO3 + CO2 + H2O
(III) CaSO4.H2O (Plaster of Paris) Used for making casts of statues.
(IV) CaCO3 is used as an Antacid.
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