List of top Chemistry Questions asked in CUET (UG)

For the electrochemical cell \[ Zn|Zn^{2+}(10^{-2}M)||Cu^{2+}(10^{-4}M)|Cu \] at \(298\,K\), \(E^\circ_{cell}=1.10\,V\). The minimum external potential required to just stop the spontaneous cell reaction is closest to:

An octahedral coordination compound of chromium(III) reacts with one mole of EDTA to form a stable chelate. The original complex has the formula \([Cr(en)_2Cl_2]^+\), where en represents ethane-1,2-diamine. The total number of geometrical and optical isomers possible for the complex is:

For a first-order reaction, the rate constant increases by a factor of \(16\) when the temperature is increased from \(300\,K\) to \(340\,K\). The activation energy of the reaction is closest to:

A coordination compound \([CoF_6]^{3-}\) is converted into \([Co(CN)_6]^{3-\). Which of the following correctly represents the hybridization and number of unpaired electrons in the final complex?}

The molar conductivities at infinite dilution of \(HCl\), \(CH_3COONa\) and \(CH_3COOH\) are \(426.0\), \(91.0\) and \(390.5\ \Omega^{-1}cm^2mol^{-1}\), respectively. If the molar conductivity of \(0.01\,M\) acetic acid solution is \(15.62\ \Omega^{-1}cm^2mol^{-1}\), the value of \(K_a\) is:

A compound \(A\) having molecular formula \(C_8H_8O\) gives a deep violet colour with neutral \(FeCl_3\). Treatment of \(A\) with excess \(CH_3I/K_2CO_3\) gives compound \(B\). Ozonolysis of \(B\) followed by reductive workup \((Zn/H_2O)\) produces one mole of anisaldehyde and one mole of formaldehyde. The anisaldehyde obtained is then subjected to Cannizzaro reaction using concentrated NaOH. The number of moles of anisyl alcohol formed from \(2\) moles of \(A\) is:

An equimolar mixture of benzaldehyde and acetaldehyde is treated with dilute NaOH. The major product formed is isolated and then subjected to \(I_2/NaOH\). The number of moles of yellow precipitate obtained per mole of benzaldehyde initially taken is:

Which of the following are fat soluble vitamins?
(A) Vitamin A
(B) Vitamin B
(C) Vitamin D
(D) Vitamin E
(E) Vitamin K
Choose the correct answer from the options given below:

Which of the following compounds will not undergo an Azo coupling reaction?

Which of the following solutions is isotonic with human blood?

When blood cells are placed in \(1%\) (w/v) NaCl aqueous solution, what will happen to the cells?

Which of the following complexes shows maximum number of unpaired electrons?

The SI unit of rate constant for a first order reaction is:

The major product formed in the following reaction is: \[ CH_3CH=CH_2 \xrightarrow{HBr,\ peroxide} \ ? \]

Among the following compounds, the correct order of acidic strength is: \[ \text{Phenol},\quad p\text{-Nitrophenol},\quad p\text{-Methoxyphenol} \]

Aniline is converted into benzene by the following sequence of reactions: \[ \text{Aniline} \xrightarrow[\text{0--5}^\circ C]{NaNO_2/HCl A \xrightarrow{H_3PO_2} B \] The compounds \(A\) and \(B\) respectively are:}

Which of the following solutions will conduct electricity most effectively?

The hybridization of carbon atom in \(CH_4\) molecule is:

The number of sigma \((\sigma)\) and pi \((\pi)\) bonds respectively in ethene molecule are:

The IUPAC name of the compound \[ CH_3-CH(CH_3)-CH_2-OH \] is:

For the reaction: \[ 2A \rightarrow Products \] the rate law is: \[ \text{Rate}=k[A]^2 \] If the concentration of \(A\) is doubled, the rate of reaction will become:

The violet colour of \(KMnO_4\) solution is due to:

The Nernst equation for a half-cell reaction at \(298\,K\) is:

The standard electrode potential of zinc electrode is \(-0.76\,V\) and that of copper electrode is \(+0.34\,V\). The standard EMF of the Daniell cell is:

For a first order reaction, the time required for completion of \(75\%\) of the reaction is \(40\) minutes. The half-life of the reaction is: