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

10 moles \[S{{O}_{2}}\] and 15 moles \[{{O}_{2}}\] were allowed to react over a suitable catalyst. 8 moles of \[S{{O}_{3}}\] were formed. The remaining moles of \[S{{O}_{2}}\] and \[{{O}_{2}}\] respectively are-

A) 2 moles, 11 moles

B) 2 moles, 8 moles

C) 4 moles, 5 moles

D) 8 moles, 2 moles

Correct Answer: A

Solution :

[a] \[\underset{10}{\mathop{2S{{O}_{2}}}}\,+\underset{15}{\mathop{{{O}_{2}}}}\,\xrightarrow{{}}\underset{0}{\mathop{2S{{O}_{3}}}}\,\]

\[10-2x~~~~~~~15-x~~~~~2x\]

\[\therefore 2x=8\text{ }\,c=4\]

Hence, remaining, \[S{{O}_{2}}=10-8=2\]moles,

\[{{O}_{2}}=15-4=11\]moles