Three students Renu, Manish and Raj were given three unknown liquids $\mathrm{P}, \mathrm{Q}$ and $\mathrm{R}$ respectively during the lab activity.

Substance	Property
	Boiling point $\left({}^{°}\mathrm{C}\right)$	Solubility in water
$\mathrm{P}$	$56$	Soluble
$\mathrm{Q}$	$45$	Insoluble
$\mathrm{R}$	$90$	Soluble

On the basis of these properties, which student has chosen the correct separation technique to separate the substance from substance-water mixture?

One mole of a hydrocarbon '$\mathrm{P}$' on complete combustion produces ${\mathrm{CO}}_2$ and ${\mathrm{H}}_2\mathrm{O}$ in the molar ratio $1:1$. The succeeding homologue of '$\mathrm{S}$' is '$\mathrm{Q}$' while preceding homologue is '$\mathrm{O}$'. The name of the homologous series is '$\mathrm{R}$'. Identify $\mathrm{O}, \mathrm{P}, \mathrm{Q}$ and $\mathrm{R}$.

Observe the given reaction carefully and identify (i), (ii), (iii) and (iv).

Which of the following events do not occur during the light reaction of photosynthesis?

1. Photolysis of water
II. Reduction of $\mathrm{NADPH}$ to $\mathrm{NADP}+$
III. Evolution of molecular oxygen
IV. Synthesis of assimilatory power
V. Conversion of carbon dioxide to carbohydrates

Which of the following is correct regarding the effects of sympathetic and parasympathetic nervous system as shown in the given table?

Identify the plant hormone '$X$' from the given statements and select the correct option regarding it:
$I.$ It promotes cell division in plants.
$II.$ It helps in breaking dormancy of seeds.
$III.$ It delays the ageing in leaves.
$IV.$ It brings about morphogenesis along with auxin during tissue culture.