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JEE Main Chemistry question

ChemistryEquilibriumJEE Main

An amount of solid is placed in a flask already containing ammonia gas at a certain temperature and 0.50 atm pressure. Ammonium hydrogen sulphide decomposes to yield and gases in the flask. When the decomposition reaction reaches equilibrium the total pressure in the flask rises to 0.84 atm. The equilibrium constant for decomposition at this temperature is

Answer: (A)

Solution

Let pressure increase due to decomposition for each gas:

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Question ID VK-135480