List of top Chemistry Questions asked in CUET (UG)

The oxoacid of sulphur which has a lone pair of electrons on the sulphur atom is:
A drop of solution (Volume 0.05 mL) contains \( 3.0 \times 10^{-6} \) moles of H\(^+\) ions. If the rate constant of disappearance of H\(^+\) is \( 1.0 \times 10^{-7} \, \text{mol litre}^{-1} \text{sec}^{-1} \), how long will it take for H\(^+\) ions to disappear?
The vapor pressure curve of the mixture of ethanol and acetone is higher than its constituents because:
Which of the following is not an expression of Dalton's law of partial pressures?
A compound forms a hexagonal closed packed structure. What is the number of tetrahedral voids in 0.8 mol of it?
Which of the following electrolytes will have maximum coagulating value for AgI/Ag$^+$ sol?
An alkyl halide with molecular formula C$_5$H$_11$Br on dehydrohalogenation gives two isomeric alkenes X and Y with formula C$_5$H$_10$. On reductive ozonolysis, X and Y give four compounds CH$_3$CHO, (CH$_3$)$_2$CHO, CH$_3$CO, HCHO. The alkyl halide is:
Glucose does not react with:
Which of the following statements is not correct?
Which of the following statement is correct about catalyst?
C$_3$H$_6$O does not form a silver mirror with Tollen’s reagent but forms an oxime with hydroxylamine. It can give positive:

Arrange the following amines in the order of decreasing basic character in gaseous phase:
(A) NH₃ 
(B) (CH₃)₃N 
(C) (CH₃)₂NH 
(D) CH₃NH₂
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Which of the following is not correct about the order of a reaction?
D(+)-Glucose reacts with hydroxylamine and forms oxime. The structure of oxime would be:
The cell reaction occurring at anode in the electrolysis of aqueous NaCl solution is:
In Freundlich adsorption isotherm, the value of \( \frac{1}{n} \) is:
Amongst the following, identify the condensation polymer/s:
(A) Bakelite
(B) Teflon
(C) Melamine formaldehyde resin
(D) Nylon-2 nylon-6
(E) Buna-S
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Match List - I with List - II

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Which of the following defects are shown by KCl crystal?
(A) Schottky defect
(B) Frenkel defect
(C) Metal excess defect
(D) Metal deficiency defect
Choose the correct answer from the options given below:
Answer the question on the basis of the passage given below:
Transition metals form a large number of complexes or coordination compounds in which the metal atoms are bound to a number of anions or neutral molecules. The valence bond theory explains the formation, magnetic behaviour, and geometrical shapes, while the crystal field theory explains the effect of different crystal fields on the degeneracy of \( d \)-orbitals and the energies of the central metal atom/ion. This provides for the quantitative estimation of orbital separation energies, magnetic moments, and spectral and stability parameters.
Two complexes of nickel have the same geometry but different magnetic behaviour are:
(A) \( \text{[Ni(CN)}_4]^{2-} \)
(B) \( \text{[Ni(CO)}_4] \)
(C) \( \text{[NiCl}_4]^{2-} \)
(D) \( \text{[Ni(NH}_3)_6]^{2+} \)
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Answer the question on the basis of the passage given below:
Transition metals form a large number of complexes or coordination compounds in which the metal atoms are bound to a number of anions or neutral molecules. The valence bond theory explains the formation, magnetic behavior, and geometrical shapes, while the crystal field theory explains the effect of different crystal fields on the degeneracy of \( d \)-orbitals energies of the central metal atom/ion. This provides for the quantitative estimation of orbital separation energies, magnetic moments, and spectral and stability parameters.
Which of the following complexes are not correctly matched with the hybridisation of their central metal ion?
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Transition metals form a large number of complexes or coordination compounds in which the metal atoms are bound to a number of anions or neutral molecules. The valence bond theory explains the formation, magnetic behaviour, and geometrical shapes, while the crystal field theory explains the effect of different crystal fields on the degeneracy of \(d\)-orbitals energies of the central metal atom/ion. This provides for the quantitative estimation of orbital separation energies, magnetic moments, and spectral and stability parameters.
Amongst the following ions, which should have the highest magnetic moment value?
Answer the question on the basis of the passage given below:
Transition metals form a large number of complexes or coordination compounds in which the metal atoms are bound to a number of anions or neutral molecules. The valence bond theory explains the formation, magnetic behaviour, and geometrical shapes, while the crystal field theory explains the effect of different crystal fields on the degeneracy of \(d\)-orbitals energies of the central metal atom/ion. This provides for the quantitative estimation of orbital separation energies, magnetic moments, and spectral and stability parameters.
The compound \( \left[\text{Pt(NH}_3)_2\text{Cl}_2\right] \) exhibits:

Answer the question on the basis of the passage given below:
Transition metals form a large number of complexes or coordination compounds in which the metal atoms are bound to a number of anions or neutral molecules. The valence bond theory explains the formation, magnetic behaviour, and geometrical shapes, while the crystal field theory explains the effect of different crystal fields on the degeneracy of \(d\)-orbitals energies of the central metal atom/ion. This provides for the quantitative estimation of orbital separation energies, magnetic moments, and spectral and stability parameters. 
Match List - I (Species/ions) with List - II (Colours): 
List - I List - II 

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Alcohols and phenol are formed when a hydrogen atom in a hydrocarbon, aliphatic and aromatic respectively, is replaced by \(-OH\). The substitution of a hydrogen atom in a hydrocarbon by an alkoxy or aryloxy group forms ethers.
Alcohols and phenol consist of two parts, an alkyl/aryl group and a hydroxyl group. The properties of alcohols and phenols are primarily due to the hydroxyl group. The nature of alkyl and aryl groups simply modify these properties. Alcohol react both as nucleophiles and electrophiles whereas in phenols, the reactions that take place on the aromatic ring are electrophilic substitution reactions.
Aspirin is an acetylation product of: