UP Board Class 12 Chemistry Question Paper 2025 PDF (Code 347 KB) is available for download here. The Mathematics exam was conducted on March 8, 2025 in the Morning Shift from 2:00 PM to 5:15 PM. The total marks for the theory paper are 100. Students reported the paper to be easy to moderate.
UP Board Class 12 Chemistry Question Paper 2025 (Code 347 KB) with Solutions
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UP Board Class 12 Chemistry Questions with Solutions
The concentration of solute in a solution is 3.5 ppm. By which of the following it may be expressed?
The most common oxidation states of Mn are –
The co-ordination number of Cu in [Cu(CN)\(_4\)]\(^{3-}\) ion is:
Which of the following is obtained by Wolff Kishner reduction?
Which of the following amine does not give carbylamine reaction?
Which of the following test is not given by aldehydic group present in glucose?
Explain molarity and molality by example.
Explain the following:
(i) Lanthanoid contraction
(ii) Oxidation states in Lanthanoids and Actinoids
Explain valence bond theory in coordination compounds.
Explain Wurtz and Fittig reactions by examples.
28 g KOH (molar mass = 56) is dissolved in 500 mL solution. Calculate the molarity of the solution.
Write chemical equation and the method of preparation of ethanol from molasses.
Explain the nature of carbonyl group and carboxylic group.
Write chemical equation of two chemical properties of glucose.
The vapour pressure of pure benzene at any temperature is 0.850 bar. 0.5 g non-volatile non-electrolytic solid is dissolved in 39.0 g benzene (molar mass 78 g mol\(^{-1}\)). The vapour pressure of the solution is 0.845 bar. Calculate the molar mass of the solid.
Define standard electrode potential. Calculate the standard electrode potential of the following cell:
Zn / Zn\(^{2+}\) \(\;\;||\;\;\) Cu\(^{2+}\) / Cu when
\(E^{0}_{(Zn^{2+}/Zn)} = -0.76 \, V\) and \(E^{0}_{(Cu^{2+}/Cu)} = +0.34 \, V\).
Define order of reaction. How will you find out the order of reaction of the reaction nA + mB \(\rightarrow\) xC + yD?
What happens when—
(i) Chromite ore reacts with potassium carbonate in presence of air.
(ii) Potassium dichromate reacts with ferrous sulphate in presence of sulphuric acid.
(iii) Potassium permanganate is heated up to 513 K.
Explain molar conductivity. The resistance of a cell filled with 0.02 mol L\(^{-1}\) KCl solution is 480 \(\Omega\). Calculate the molar conductivity of the solution. (Cell constant = 1.29 cm\(^{-1}\)).
Write unit of first order reaction. The initial concentration of N\(_2\)O\(_5\) at 318 K was \(0.60\times 10^{-2}\) mol L\(^{-1}\) in the first order reaction, which became \(0.20\times 10^{-2}\) mol L\(^{-1}\) after 60 min. Calculate the velocity constant at 318 K. (log 3 = 0.4771).
Write the formula of the following coordination compounds:
(i) Hexa aqua chromium (III) chloride
(ii) Dichlorido diammin e platinum (II)
(iii) Hexa ammine platinum (IV) chloride
(iv) Sodium penta cyano nitrosyl ferrate (II)
Explain primary, secondary, tertiary and quaternary structures of protein in detail.
Explain the mechanism of substitution reactions of Haloalkane.
Explain optical activity, chirality, retention, inversion and racemisation in Haloalkane.
Write chemical equations of dehydration reactions of primary, secondary and tertiary alcohols and also write mechanism of dehydration reaction of primary alcohol.
Write chemical equations for obtaining the following from phenol:
(i) 4-Nitrophenol
(ii) Picric acid
(iii) 4-Bromophenol
(iv) Salicylaldehyde
(v) Benzoquinone
Write chemical equation for five methods of preparation of Ketones.
Write chemical equation for two methods of preparation and three chemical properties of carboxylic acid.
Write chemical equation of five chemical properties of amines.
OR,
Write chemical equations of three methods of preparation of amine and also write the mechanism of ammonolysis of alkyl halides.
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