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P Block Elements question

2021 · 26 Feb · Shift 1 · Q3
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P Block Elements question

2021 · 26 Feb · Shift 1 · Q3

JEE MainChemistryP Block ElementsMCQ+4 / −1
Find A, B and C in the following reactions : NH3+A+CO2→(NH4)2CO3(NH4)2CO3+H2O+B→NH4HCO3NH4HCO3+NaCl→NH4Cl+CN{H_3} + A + C{O_2} \to {(N{H_4})_2}C{O_3}{(N{H_4})_2}C{O_3} + {H_2}O + B \to N{H_4}HC{O_3}N{H_4}HC{O_3} + NaCl \to N{H_4}Cl + CNH3​+A+CO2​→(NH4​)2​CO3​(NH4​)2​CO3​+H2​O+B→NH4​HCO3​NH4​HCO3​+NaCl→NH4​Cl+C
  1. A
    A−O2;B−CO2;C−Na2CO3A - {O_2};B - C{O_2};C - N{a_2}C{O_3}A−O2​;B−CO2​;C−Na2​CO3​
  2. B
    A−H2O;B−O2;C−NaHCO3A - {H_2}O;B - {O_2};C - NaHC{O_3}A−H2​O;B−O2​;C−NaHCO3​
  3. C
    A−H2O;B−O2;C−Na2CO3A - {H_2}O;B - {O_2};C - N{a_2}C{O_3}A−H2​O;B−O2​;C−Na2​CO3​
  4. D
    A−H2O;B−CO2;C−NaHCO3A - {H_2}O;B - C{O_2};C - NaHC{O_3}A−H2​O;B−CO2​;C−NaHCO3​
View written solutionFree

Correct answer: D

  1. Interpret the reaction sequence

    The given sequence is: NH3+A+CO2o(NH4)2CO3NH_3 + A + CO_2 o (NH_4)_2CO_3NH3​+A+CO2​o(NH4​)2​CO3​ (NH4)2CO3+H2O+BoNH4HCO3(NH_4)_2CO_3 + H_2O + B o NH_4HCO_3(NH4​)2​CO3​+H2​O+BoNH4​HCO3​ NH4HCO3+NaCloNH4Cl+CNH_4HCO_3 + NaCl o NH_4Cl + CNH4​HCO3​+NaCloNH4​Cl+C

    We must identify AAA, BBB, and CCC.

  2. Find AAA in the first reaction

    Formation of ammonium carbonate occurs by: 2NH3+H2O+CO2o(NH4)2CO32NH_3 + H_2O + CO_2 o (NH_4)_2CO_32NH3​+H2​O+CO2​o(NH4​)2​CO3​

    So, A=H2OA = H_2OA=H2​O

  3. Find BBB in the second reaction

    Ammonium carbonate converts to ammonium bicarbonate in presence of water and carbon dioxide: (NH4)2CO3+H2O+CO2o2NH4HCO3(NH_4)_2CO_3 + H_2O + CO_2 o 2NH_4HCO_3(NH4​)2​CO3​+H2​O+CO2​o2NH4​HCO3​

    Hence, B=CO2B = CO_2B=CO2​

  4. Find CCC in the third reaction

    This is the Solvay process step: NH4HCO3+NaCloNH4Cl+NaHCO3NH_4HCO_3 + NaCl o NH_4Cl + NaHCO_3NH4​HCO3​+NaCloNH4​Cl+NaHCO3​

    Therefore, C=NaHCO3C = NaHCO_3C=NaHCO3​

  5. Match with the options

    We found:

    \quad B = CO_2, \quad C = NaHCO_3$$ This corresponds to **Option D**.

  6. Answer verification

    Stored correct answer: D
    Derived answer: D
    Therefore, the derived answer agrees with the stored answer.

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