In the reaction , ratio by volume of and is . This illustrates law of:
1
definite proportion
2
multiple proportion
3
reciprocal proportion
4
gaseous volumes
Official Solution
Correct Option: (4)
Concept:
Gay-Lussac’s law of gaseous volumes:
Step 1: Given reaction.
Step 2: Interpretation.
The ratio of volumes is simple integers.
02
PYQ 2023
medium
chemistryID: met-2023
Consider the graph for cyclic process. The isothermal compression process among them is:
1
I
2
II
3
III
4
IV
Official Solution
Correct Option: (3)
Concept: •Isothermal process: → rectangular hyperbola
•Compression: volume decreases (motion from right to left) Step 1: Identify isothermal curve
In a graph, isothermal process is represented by a curved (hyperbolic) path. Step 2: Check direction
Compression means volume decreases, so the path must move from right to left. Step 3: Analyze given processes •Process III: curved path with decreasing volume → isothermal compression
•Other processes represent expansion or different thermodynamic paths Conclusion
