(i) Geographical [graphical] representation of a gas law is given below (see figure).
(a) Name the gas law represented in graph. (1)
(b) State the above gas law. (1)
(ii) Write ideal gas equation. (1)

![A simple line graph with y-axis labeled 'Pressure (P)' and x-axis labeled 'V

Question

(i) Geographical [graphical] representation of a gas law is given below (see figure).
(a) Name the gas law represented in graph. (1)
(b) State the above gas law. (1)
(ii) Write ideal gas equation. (1)

![A simple line graph with y-axis labeled 'Pressure (P)' and x-axis labeled 'Volume (1/V)'. A straight line starts at the origin and rises — Class 12 Chemistry question](/figures/states-of-matter/simple-line-graph-axis-pressure-axis-volume-fig-pyq-deumon.svg)

Accepted Answer

>

> [!TLDR]
> A straight line through the origin on a plot of P vs 1/V is the graphical signature of Boyle's Law (P directly proportional to 1/V at constant T).
>
> **(i)(a) & (b):** The given graph plots Pressure (P) on the y-axis against 1/V (reciprocal of Volume) on the x-axis, and shows a straight line passing through the origin — i.e., P is directly proportional to 1/V. This is exactly the graphical statement of Boyle's Law.
>
> Boyle's Law states: at constant temperature, the pressure of a fixed amount (fixed mass/fixed number of moles) of a gas is inversely proportional to its volume.
> P ∝ 1/V (at constant T and n), or equivalently PV = constant, or P1V1 = P2V2 for two states at the same temperature. …

Q.(i) Geographical [graphical] representation of a gas law is given below (see figure).

Concept understanding — Gas Laws Overview

Q.(i) Geographical [graphical] representation of a gas law is given below (see figure).

🎓Unlock everything free for 14 days

Unlock everything free for 14 days