Q1 / 90 · JEE Main 2024 (01 Feb Shift 1) · Chemistry

Consider the following reaction:

3PbCl2+2NH43PO4→Pb3PO42+6NH4Cl

If 72 mmol PbCl2 is mixed with 50 mmol of NH43PO4, then amount of Pb3PO42 formed in mmol. (nearest integer)

Correct answer: 24

Solution

The reaction is given as,

3PbCl2+2NH43PO4→Pb3PO42+6NH4Cl

The products formed in the above reaction is Pb3PO42 and NH4Cl  .

According to the above stoichiometric equation, three mole of each lead chloride and two moles of NH43PO4 is required to make one mole of Pb3PO42 and 6 moles of NH4Cl   

Here the Limiting Reagent is PbCl2

mmol of Pb3(PO4)2 formed

=mmol of PbCl2 reacted 3=723

=24 m mol

Hence, the correct answer is 24.

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