Mole Concept & Stoichiometry · JEE Main previous year questions

2006 2 questions

1. Q962006 · 29 Apr 2006 · Shift 1

   How many moles of magnesium phosphate $\mathrm{M}{\mathrm{g}}_3(\mathrm{P}{\mathrm{O}}_4{)}_2$ will contain $0.25\mathrm{mole}$ of oxygen atoms?

   1. A.$1.25\times 10^{-2}$
   2. B.$2.5\times 10^{-2}$
   3. C.$0.02$
   4. D.$3.125\times 10^{-2}$
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   Answer: D

2. Q972006 · 29 Apr 2006 · Shift 1

   Density of a $2.05\mathrm{M}$ solution of acetic acid in water is $1.02g/mL$. The molality of the solution is

   1. A.$2.28\mathrm{mol}\mathrm{k}{\mathrm{g}}^{-1}$
   2. B.$0.44\mathrm{mol}\mathrm{k}{\mathrm{g}}^{-1}$
   3. C.$1.14\mathrm{mol}\mathrm{k}{\mathrm{g}}^{-1}$
   4. D.$3.28\mathrm{mol}\mathrm{k}{\mathrm{g}}^{-1}$
   Show answer

   Answer: A