Identify the correct graph for an ideal gas $(y$-axis $=$ compressibility factor, $Z: x$-axis $=$ pressure, $p)$
Identify the correct statements from the following:
I. Glass is an extremely viscous liquid.
II. Increase in temperature decreases the surface tension of liquids.
III. Compressibility factor for an ideal gas is zero.
Identify the correct statements about the following stoichiometric equation.
$$ a \mathrm{P}_4+b^{-} \mathrm{OH}+c \mathrm{H}_2 \mathrm{O} \longrightarrow d \mathrm{PH}_3+e \mathrm{H}_2 \mathrm{PO}_2^{-} $$
I. $a+b+c=5$
II. $b+c-e=3$
III. The oxidation state of P in $\mathrm{H}_2 \mathrm{PO}_2^{-}$is +l .
5 moles of a gas is allowed to pass through a series of changes as shown in the graph, in a cyclic process. The processes $C \rightarrow A, B \rightarrow C$ and $A \rightarrow B$ respectively are

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