JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Self Evaluation Test - Some Basic Concepts of Chemistry

The mass of \[BaC{{O}_{3}}\]produced when excess \[C{{O}_{2}}\] is bubbled through a solution of 0.205 mol \[Ba{{\left( OH \right)}_{2}}\]is:

A) 81 g

B) 40.5 g

C) 20.25 g

D) 162 g

Correct Answer: B

Solution :

[b] \[\underset{1\,mol}{\mathop{Ba{{\left( OH \right)}_{2}}}}\,+C{{O}_{2}}\xrightarrow{{}}\underset{1\,mol}{\mathop{BaC{{O}_{3}}}}\,+{{H}_{2}}O\]

\[1\,mol\,Ba{{(OH)}_{2}}=1mol\,BaC{{O}_{3}}\]

\[\therefore 0.205\text{ }mol\text{ }Ba{{\left( OH \right)}_{2}}=0.205\text{ }mol\text{ }BaC{{O}_{3}}\]

Wt. of substance = No. of moles x Molecular

Mass \[=0.205\times 197.3=40.5\text{ }g\]