HARD
12th CBSE
IMPORTANT
Earn 100

Predict the major product formed on adding HCl to isobutylene and write the IUPAC name of the product. Explain the mechanism of the reaction.

Important Questions on Model Question Paper II

EASY
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 18 - Model Question Paper II>MODEL QUESTION PAPER>Q 23
Explain why rate of reaction of Lucas reagent with three classes of alcohols different? Give chemical equations wherever required.
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 18 - Model Question Paper II>MODEL QUESTION PAPER>Q 24
A primary amine, R—NH2 can be reacted with alkyl halide, RX, to get secondary amine, R2NH, but the only disadvantage is that 3∘ amine and quaternary ammonium salts are also obtained as side products. Can you suggest a method where CH3NH2 forms only 2∘ amine?
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 18 - Model Question Paper II>MODEL QUESTION PAPER>Q 25

Label the glucose and fructose units in the following disaccharide and identify anomeric carbon atoms in these units. Is sugar reducing in nature? Explain.

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HARD
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 18 - Model Question Paper II>MODEL QUESTION PAPER>Q 28
Explain why does the enthalpy change of a reaction remain unchanged even when a catalyst is used in the reaction.
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 18 - Model Question Paper II>MODEL QUESTION PAPER>Q 28
With the help of an example explain what is meant by pseudo first order reaction.
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 18 - Model Question Paper II>MODEL QUESTION PAPER>Q 29
When a chromite ore (A) is fused with sodium carbonate in free excess of air and the product is dissolved in water, a yellow solution of compound (B) is obtained. After treatment of this yellow solution with sulphuric acid, compound (C) can be crystallised from the solution. When compound (C) is treated with KCl solution, orange crystals of compound (D) crystallise out. Identify compounds A to D and also explain the reactions.
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 18 - Model Question Paper II>MODEL QUESTION PAPER>Q 29
An oxide of manganese (A) is fused with KOH in the presence of an oxidising agent and dissolved in water. A dark green solution of compound (B) is obtained. Compound (B) disproportionates in neutral or acidic solution to give purple compound (C). Alkaline solution of (C) oxidises potassium iodide solution to a compound (D) and compound (A) is also formed. Identify compounds A to D and also explain the reactions involved.
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 18 - Model Question Paper II>MODEL QUESTION PAPER>Q 30
An aromatic compound ‘A’ (Molecular formula C8H8O) gives positive 2, 4-DNP test. The compound gives a yellow precipitate of compound ‘B’ on treatment with iodine and sodium hydroxide solution. It does not give Tollen’s or Fehling’s test. On drastic oxidation with potassium permanganate, it forms a carboxylic acid ‘C’ (Molecular formula C7H6O2) which is also formed along with the yellow compound in the above reaction. Identify compounds A, B and C and write all the reactions involved.