UP Board Class 12 Chemistry Question Paper with Answer Key (March 4, Code 347 CC)

Which is not a stoichiometric defect?

• (A) Interstitial defect
• (B) Frenkel defect
• (C) Metal excess defect
• (D) Schottky defect

Number of moles in 180 grams water is:

• (A) 10
• (B) 100
• (C) 18
• (D) 1

Zero order reaction is:

• (A) \(2FeCl_{3} + SnCl_{2} \longrightarrow 2FeCl_{2} + SnCl_{4}\)
• (B) \(H_{2} + Cl_{2} \longrightarrow 2HCl\)
• (C) \(CH_{3}COOC_{2}H_{5} + NaOH \longrightarrow CH_{3}COONa + C_{2}H_{5}OH\)
• (D) \(CH_{3}COOCH_{3} + H_{2}O \longrightarrow CH_{3}COOH + CH_{3}OH\)

Formalin is an aqueous solution of:

• (A) Fluorescein
• (B) Formaldehyde
• (C) Formic acid
• (D) Acetic acid

The reagent used to prepare amine from amide is:

• (A) HCl/ZnCl\(_2\)
• (B) K\(_2\)Cr\(_2\)O\(_7\)/H\(_2\)SO\(_4\)
• (C) NaOH/Ca(OH)\(_2\)
• (D) Br\(_2\)/KOH

Glucose or Aldehyde reacts with Tollen's reagent to form:

• (A) Ag\(_2\)O
• (B) Ag
• (C) AgCl
• (D) Ag(NH\(_3\))Cl

Calculate the packing efficiency of a cubic lattice when an atom located at the centre remains in touch with the other two atoms located on the diagonal.

Calculate the mole fraction of glycerol in 30% by weight of aqueous glycerol (C\(_3\)H\(_8\)O\(_3\)) solution.

The value of standard electrode potential of Daniell cell is 1.1 V. Calculate the value of standard Gibbs energy for the following reaction.
\[ Zn (s) + Cu^{2+}(aq) \longrightarrow Zn^{2+}(aq) + Cu (s) \]

Explain Electrophoresis.

Explain Schottky defect with the help of a diagram.

Write the chemical equation of manufacture of chlorine by Deacon’s process and also write chemical equation of the reaction of Cl\(_2\) with sulphur.

Explain coordination number by an example.

Write chemical equation of the reaction of glucose with (i) Hydroxylamine, and (ii) Bromine water.

Write Nernst equation and its one application in chemical cells.

Explain Adsorption theory of heterogeneous catalysis.

Differentiate between primary, secondary and tertiary amines. (Write chemical equations)

Explain the difference between DNA and RNA.

Explain osmotic pressure of solution. Establish a relationship between osmotic pressure of solution and molar mass of solute.

Explain average and instantaneous rate of reaction and describe two factors which affect them.

Write electronic configuration of Cr (Z = 24) and Cu (Z = 29) and also explain two main characteristics of transition elements.

Explain Crystal Field Theory (CFT) in coordination compounds and write its limitations.

What happens when:

• (A) Sodium Azide is heated?
• (B) Lithium is heated with Nitrogen?
• (C) Ammonium chromate is heated?
• (D) Nitrogen is heated with oxygen?
• (E) The aqueous solutions of Ammonium chloride and Sodium nitrite are allowed to react?

Describe the industrial method of preparation of Ammonia giving flow diagram and chemical equation and write chemical equation of the reaction of Ammonia with (i) Copper ion, and (ii) Silver ion.

Write chemical equations for the following:

• (i) Kolbe reaction
• (ii) Reimer-Tiemann reaction
• (iii) Oxidation of Phenol
• (iv) Williamson synthesis
• (v) Industrial preparation of Methanol

Write chemical equation and mechanism of acid catalysed hydration of Alkene.

Write chemical equation for identifying primary and secondary alcohol.

In spite of being an electron withdrawing group, why does chlorine act as ortho-para directing group in aromatic electrophilic substitution reactions?

Write notes on the following:

• (I) Wurtz–Fittig reaction
• (II) Sandmeyer reaction

Explain the Resonance effect in nucleophilic substitution reactions of Haloarenes.

Write chemical equations of reactions of haloalkanes with two metals.

Write short notes on the following:

• (i) Aldol and Crossed Aldol Condensation in Aldehyde and Ketone
• (ii) Cannizzaro Reaction

Write chemical equations of five methods of preparation of Carboxylic acid.