List of top Chemistry Questions asked in CUET (UG)

The $5%$ solution of cane sugar $(\text{molecular weight}=342)$ is isotonic with $1%$ solution of substance $X$. The molecular weight of $X$ is:

The vapor pressures of two liquids $P$ and $Q$ are $80$ torr and $60$ torr respectively. The total vapor pressure of the solution obtained by mixing $3$ mol of $P$ and $2$ mol of $Q$ would be:

The average osmotic pressure of human body is $7.8$ bar at $37^\circ C$. What is the concentration of an aqueous solution of $NaCl$ that could be used in bloodstream?

The molal freezing point constant for water is $1.86^\circ C$. The freezing point of $0.1\,m\;NaCl$ solution is expected to be:

Which of the following solutions has highest osmotic pressure?

Which has the lowest boiling point at 1 atm pressure?

When phenol is treated with chloroform ($\text{CHCl}_3$) in the presence of an aqueous sodium hydroxide solution followed by acidification, a prominent aromatic aldehyde is generated. What is the name of this organic reaction?

Which of the following alkyl halides will undergo the fastest rate of nucleophilic substitution via an $\text{S}_{\text{N}}1$ mechanism when treated with an aqueous nucleophile?

Using Crystal Field Theory (CFT), what is the correct electronic configuration and magnetic behavior of the high-spin complex \[ [\text{Fe}(\text{H}_2\text{O})_6]^{2+} \, ? \]

Which of the following coordination complex ions exhibits structural asymmetry leading to optical isomerism?

An organic compound with the molecular formula $\text{C}_7\text{H}_8\text{O}$ is completely insoluble in water but dissolves readily in an aqueous $\text{NaOH}$ solution. When treated with bromine water, it forms a white precipitate. Identify the compound.

What is the correct increasing order of basic strength for the following amines when measured inside an aqueous medium?
\[ \text{(I) } \mathrm{CH_3NH_2} \] \[ \text{(II) } \mathrm{(CH_3)_2NH} \] \[ \text{(III) } \mathrm{(CH_3)_3N} \] \[ \text{(IV) } \mathrm{NH_3} \]

Which of the following expressions correctly relates the limiting molar conductivity ($\Lambda_m^\circ$) of aluminum sulfate, $\text{Al}_2(\text{SO}_4)_3$, to its individual ionic components according to Kohlrausch's Law?

What is the cell potential ($E_{\text{cell}}$) for a concentration cell consisting of two hydrogen electrodes at $298\text{ K}$, where the anode compartment is at $\text{pH} = 3$ and the cathode compartment is at $\text{pH} = 1$ under standard pressure conditions?

According to collision theory, increasing the starting concentration of a collection of reacting molecules directly results in a change in which of the following system factors?

For a first-order reaction, if the time taken for $90\%$ completion is $t$, what will be the approximate time taken for $99.9\%$ completion of the same reaction?

The magnetic nature of elements depends on the presence of unpaired electrons. Identify the configuration of transition element, which shows highest magnetic moment.

Which of the following oxidation state is common for all lanthanoids?