COMEDK 2026 Afternoon Shift

A $5 \%$ solution (by mass) of cane sugar in water has a freezing point of 271 K . The freezing point of a $5 \%$ solution (by mass) of glucose in water is: [freezing point of pure water: 273.15 K ]

Identify the law which is stated as "For any solutions, the partial vapour pressure of each volatile component in the solution is directly proportional to its mole fraction".

Which of the following is an INCORRECT match?

$x$ moles of $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ oxidises 1 mole of ferrous oxalate, in acidic medium. Hence ' $x$ ' is:

In the redox reaction, taking place in acidic medium: $\mathrm{X} \mathrm{MnO}_4^{-}(\mathrm{aq})+\mathrm{YSO}_2(\mathrm{~g}) \rightarrow \mathrm{Mn}^{+2}(\mathrm{aq})+\mathrm{HSO}_4^{-}(\mathrm{aq})$, the ratio of $X: Y$ in a stoichiometri...

How many molecules of $\mathrm{CO}_2(\mathrm{~g})$ are obtained on reaction of 24 grams of methane with 4 moles of oxygen?

500 mL of an aqueous solution of glucose $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6$ (Molar mass $180 \mathrm{gmol}^{-1}$ ) contains $6.02 \times 10^{22}$ molecules.
The concentration of the solution will be:

Identify the INCORRECT statement

For an ideal gas undergoing an isothermal change, there is $\_\_\_\_$

The standard enthalpies of formation of $\mathrm{CH}_4(\mathrm{~g}), \mathrm{CO}_2(\mathrm{~g})$ and $\mathrm{H}_2 \mathrm{O}(\mathrm{l})$ are $-74.8 \mathrm{~kJ} \mathrm{~mol}^{-1},-393.5 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and $-285.8 \mathr...