CUET 2026 Chemistry May 18 Shift 2 Question Paper- Download Answer Key and Solution PDF

For the reaction \[ 2A+B\rightarrow3C+D \]

Which of the following does not express the reaction rate?

• (A) \(-\dfrac{d[B]}{dt}\)
• (B) \(\dfrac{d[D]}{dt}\)
• (C) \(-\dfrac12\dfrac{d[A]}{dt}\)
• (D) \(\dfrac13\dfrac{d[C]}{dt}\)

The oxidation potentials of \(A\) and \(B\) are \[ +2.37\ \mathrm{V} \quad and \quad +1.66\ \mathrm{V} \]
respectively. In chemical reactions

• (A) \(A\) will be replaced by \(B\)
• (B) \(A\) will replace \(B\)
• (C) \(A\) will not replace \(B\)
• (D) \(A\) and \(B\) will not replace each other

For which value of \(x\) and \(y\), the following square planar compound shows geometrical isomers \[ [\mathrm{Pt(Cl)_x(Br)_y}]^{2-} \]

• (A) \(1,3\)
• (B) \(3,1\)
• (C) \(2,2\)
• (D) \(1,1\)

Match the columns

• (A) \(A \to (r),\ B \to (q),\ C \to (p),\ D \to (s)\)
• (B) \(A \to (q),\ B \to (p),\ C \to (s),\ D \to (r)\)
• (C) \(A \to (s),\ B \to (q),\ C \to (p),\ D \to (r)\)
• (D) \(A \to (r),\ B \to (p),\ C \to (s),\ D \to (q)\)

To prepare \(3\)-ethylpentan-\(3\)-ol, the reagents needed are

• (A) \(\mathrm{CH_3CH_2MgBr + CH_3COCH_2CH_3}\)
• (B) \(\mathrm{CH_3MgBr + CH_3CH_2CH_2COCH_2CH_3}\)
• (C) \(\mathrm{CH_3CH_2MgBr + CH_3CH_2COCH_2CH_3}\)
• (D) \(\mathrm{CH_3CH_2CH_2MgBr + CH_3COCH_2CH_3}\)

Chromosomes are made from

• (A) proteins
• (B) nucleic acids
• (C) proteins and nucleic acids
• (D) carbohydrates and nucleic acids

The electronic configuration of \(\mathrm{Cu(II)}\) is \[ 3d^9 \]
whereas that of \(\mathrm{Cu(I)}\) is \[ 3d^{10} \]

Which of the following is correct?

• (A) \(\mathrm{Cu(II)}\) is more stable
• (B) \(\mathrm{Cu(I)}\) is less stable
• (C) \(\mathrm{Cu(I)}\) and \(\mathrm{Cu(II)}\) are equally stable
• (D) Stability of \(\mathrm{Cu(I)}\) and \(\mathrm{Cu(II)}\) depends on nature of copper salts

On addition of small amount of \(KMnO_4\) to concentrated \(H_2SO_4\), a green oily compound is obtained which is highly explosive in nature. Identify the compound from the following.

• (A) \(\mathrm{Mn_2O_7}\)
• (B) \(\mathrm{MnO_2}\)
• (C) \(\mathrm{MnSO_4}\)
• (D) \(\mathrm{Mn_2O_3}\)

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

• (A) \(+2\)
• (B) \(+3\)
• (C) \(+4\)
• (D) \(+5\)

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

• (A) \(3d^7\)
• (B) \(3d^5\)
• (C) \(3d^8\)
• (D) \(3d^2\)