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5.1 g NH_4 SH is introduced in 3.0 L evacuated flask at 327^oC . 30% of the solid NH_4 SH is decomposed to NH_3 and H_2S as gases. The K_P of the…

JEE Main 2019 — Chemistry Physical Chemistry

2019mcqhard

5.1gNH4SH5.1 g {\mathrm{NH}}_{4}\mathrm{SH}5.1gNH4​SH is introduced in 3.0L3.0 L3.0L evacuated flask at 327oC{327}^{o}C327oC . 3030%30 of the solid NH4SH{\mathrm{NH}}_{4}\mathrm{SH}NH4​SH is decomposed to NH3{\mathrm{NH}}_{3}NH3​ and H2S{H}_{2}SH2​S as gases. The KP{K}_{P}KP​ of the reaction at 327oC{327}^{o}C327oC is

(R=0.082Latmmol−1K−1,MolarmassofS=32gmol−1,MolarmassofN=14gmol−1)(R=0.082 L \mathrm{atm} {\mathrm{mol}}^{-1}{K}^{-1},\mathrm{Molar} \mathrm{mass} \mathrm{of} S=32 g {\mathrm{mol}}^{-1}, \mathrm{Molar} \mathrm{mass} \mathrm{of} N=14g {\mathrm{mol}}^{-1})(R=0.082Latmmol−1K−1,MolarmassofS=32gmol−1,MolarmassofN=14gmol−1)

Official previous-year question

Held on 10 Jan 2019 · Verified 6 Jul 2026.

Options

  1. A

    0.242atm20.242 {\mathrm{atm}}^{2}0.242atm2

  2. B

    0.242×10−4atm20.242\times {10}^{-4} {\mathrm{atm}}^{2}0.242×10−4atm2

  3. C

    1×10−4atm21\times {10}^{-4} {\mathrm{atm}}^{2}1×10−4atm2

  4. D

    4.9×10−3atm24.9\times {10}^{-3} {\mathrm{atm}}^{2}4.9×10−3atm2

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