UP Board Class 12 Chemistry Question Paper with Answer Key Code 347 CF is available for download. The exam was conducted by the Uttar Pradesh Madhyamik Shiksha Parishad (UPMSP) on March 4, 2023 in Afternoon Session 2 PM to 5:15 PM. The medium of paper was English and Hindi. In terms of difficulty level, UP Board Class 12 Chemistry paper was Difficult. The question paper comprised a total of 7 questions.
UP Board Class 12 Chemistry (Code 347 CF) Question Paper with Answer Key (March 4)
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The crystal system having dimensions \(a \neq b \neq c\) and \(\alpha = \beta = \gamma = 90^\circ\) is:
The concentration unit independent of temperature is:
The unit of velocity constant for first order reactions is:
Benzyl alcohol is obtained from benzaldehyde by –
Hinsberg’s reagent is –
Which of the following base is not present in DNA?
What is Schottky defect? What is the effect of the presence of Schottky defect on the density of lattice?
Define Osmotic pressure. How will you show that Osmotic pressure is a colligative property?
Explain Kohlrausch’s law of independent migration of ions. Mention one application of this law.
Define Lyophilic and Lyophobic colloids with examples. Why is Lyophobic colloids easily coagulated?
Calculate the packing efficiency of body centred cubic (b.c.c.) unit cell.
\(H_2O\) is a liquid while \(H_2S\) is a gas. Why?
Write the formulae of the following coordination compounds on the basis of I.U.P.A.C. rules:
Write a short note on primary and secondary structures of proteins.
At 298 K write Nernst equation for the following cell –
Ni \(\vert\) Ni\(^{2+}\) (0.01 M) \(\Vert\) Cu\(^{2+}\) (0.1 M) \(\vert\) Cu.
If the emf of the above cell (\(E_{cell}\)) is 0.59 V then calculate the standard emf of the cell (\(E^\circ_{cell}\)).
Write a short note on Coagulation.
‘Action of soap is based on the emulsification and micelle formation.’ Comment on it.
Write a short note on Gabriel’s phthalimide synthesis. Why is Gabriel’s phthalimide synthesis preferred for synthesizing the primary amines?
What do you mean by D and L configurations of carbohydrates? Draw the structural formula of D-Glucose and D-Fructose.
The concentration of the solution of glucose in water is 10% (w/w). If the density of this solution is 1.20 g mL\(^{-1}\), then calculate –
What is half-life for a chemical reaction? Show that the half-life for a first order reaction is independent of the initial concentration of the reactants.
The velocity constant for the first order reaction is \(6.93 \times 10^{-3}\) min\(^{-1}\). Calculate the half-life of this reaction.
Which one of the ions Fe\(^{2+}\) and Fe\(^{3+}\) is more paramagnetic and why?
Zn\(^{2+}\) salts are colourless while Ni\(^{2+}\) salts are coloured. Why?
Explain Werner’s postulates related to the bonding in coordination compounds.
Describe Ostwald’s process for the industrial manufacture of nitric acid. Write the balanced chemical equations of the following reactions:
Give reason that bleaching action of chlorine is permanent while that of SO\(_2\) is temporary.
Explain why NH\(_3\) is basic in nature.
What happens when Sulphur dioxide reacts with acidic potassium permanganate? Write balanced chemical equation for this reaction.
Write the mechanism of dehydration of ethanol.
Write short notes on the following:
How will you obtain the following:
Discuss the mechanism of unimolecular and bimolecular nucleophilic substitution reactions in haloalkanes.
Write short notes on the following:
Write short notes on the following:
What happens, when – (Give chemical equations only)
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