Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
s Block Elements

NTA Abhyas 2020 · Chemistry · s Block Elements

Which of the following reaction is taking place resulting in...

Which of the following reaction is taking place resulting in discolouration of marble of the buildings like Taj Mahal?

Options

  1. ACaCO3+H2SO4→CaSO4+H2O+CO2CaC{O}_{3} + {H}_{2}S{O}_{4} \to CaS{O}_{4} + {H}_{2}O + C{O}_{2}
  2. BCaCO3+2HCl→CaCl2+H2O+CO2CaC{O}_{3} + 2HCl \to CaC{l}_{2} + {H}_{2}O + C{O}_{2}
  3. CCaCO3+H2O→Ca(OH)2+CO2CaC{O}_{3} + {H}_{2}O \to Ca{\left(OH\right)}_{2} + C{O}_{2}
  4. DCaCO3→CaO+CO2CaC{O}_{3} \to CaO + C{O}_{2}

Correct answer

A. CaCO3+H2SO4→CaSO4+H2O+CO2CaC{O}_{3} + {H}_{2}S{O}_{4} \to CaS{O}_{4} + {H}_{2}O + C{O}_{2}

Step-by-step solution

High level of sulphur and nitrogen oxides cause acid rain which reacts with marble to decolourise it.
Practice s Block Elements on Quantrex Academy →

More from s Block Elements

First and second ionization enthalpies of lithium are 520 kJ mol ^ -1 and 7297 kJ mol ^… JEE Main 2026The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides… JEE Main 2026Given below are two statements: One is labelled as Assertion A and the other is labelled… JEE Main 2023Be ( OH ) _ 2 reacts with Sr ( OH ) _ 2 to yield an ionic salt. Choose the incorrect… JEE Main 2023In the given reaction cycle X, Y and Z respectively are JEE Main 2023The density of alkali metals is in the order JEE Main 2023Alkali metal from the following with least melting point is JEE Main 2023Mg ( NO _ 3 ) _ 2 . XH _ 2 O and Ba ( NO _ 3 ) _ 2 . YH _ 2 O , represent formula of the… JEE Main 2023 Full s Block Elements list All NTA Abhyas JEE Main PYQs