Chemistry Compulsory Questions

Group A

• All questions in this section are compulsory.

Question 1a: Electrophile in Halogenation of Phenol

• The question asks for the electrophile used in the halogenation of phenol.
• The options are Cl2, Cl+, Cl-, and Cl.

Question 1b: Monosaccharide Identification

• The question asks to identify which of the following is a monosaccharide.
• The options provided are Lactose, Maltose, Glucose, and Cellulose.

Question 1c: Acid Hydrolysis of Ethyl Acetate

• Asks about the reaction order for the acid hydrolysis of ethyl acetate.
• Options provided are zero-order, first-order, second-order, and third-order.

Question 1d: Atoms in a Body-Centred Cubic Cell

• Asks for the number of atoms per unit cell in a body-centred cubic cell.
• The choices are 4, 8, 2, and 1.

Question 1e: Ore of Copper

• What is the ore of copper?
• Options are Dolomite, Bauxite, Haematite, and Malachite.

Question 1f: Reduction of Tollens' Reagent

• The question asks which of the given compounds cannot reduce Tollens' reagent.
• The options are different organic compounds with aldehyde or ketone groups.

Question 1g: Iodoform Reaction

• Which of the compounds doesn't give iodoform test?
• Options are Acetone, Acetaldehyde, Methyl alcohol and Ethyl alcohol

Question 2a: Fill in the Blanks

Unit of Cell Constant

• Fill in the blank: the unit of cell constant is ____.

IUPAC Name of Acetone

• Fill in the blank: the IUPAC name of acetone is ____.

Shape of Ni(CO)4

• Fill in the blank: the shape of Ni(CO)4 is ____.

Question 2b: Answer the Following Questions

Radioactive Noble Gas

• Which noble gas is radioactive?

Purest Form of Iron

• Name the purest form of iron.

IUPAC Name of [Co(en)2Cl2]+

• Write the IUPAC name of [Co(en)2Cl2]+.

Question 2(iv): Rate Constant for First-Order Reaction

• Question asks for the unit of the rate constant for the first-order reaction.

Group B

• Answer any seven of the following questions.

Question 3a: Match List-I with List-II

• Match List-I (Disprin, Sucrose, Tetracycline, Buna-S) with List-II (Antibiotic, Carbohydrate, Analgesic, Polymer).

Question 3b: Sulfur Dioxide and Acidulated Potassium Dichromate

• What happens when SO2 is passed through acidulated potassium dichromate solution?

Question 3c: Order and Molecularity of Reaction

• The question asks to differentiate between the order of a reaction and the molecularity of a reaction.

Question 3d: Tyndall Effect

• The question asks what the Tyndall effect is, and requests one condition for the Tyndall effect to occur.

Question 3e: Heating PCl5

• What happens when PCl5 is heated?

Question 3f: H2O Liquid vs. H2S Gas

• Explain why H₂O is a liquid at room temperature, while H₂S is a gas.

Question 3g: Van't Hoff Factor

• Define the van't Hoff factor.

Question 3h: Soaps and Detergents

• What are the differences between soaps and detergents?

Question i: Aldehyde and Ketone Test

• Suggest one chemical test to distinguish between an aldehyde and a ketone. Give the equation.

Question j: Identify A and B

• Identify A and B in the given reaction sequence: CH3COOH → A → B.

General Instructions

• Answer any seven of the following questions.

Question 4a: Werner's Theory

• Give a brief account of Werner's theory of coordination compounds.

Question 4b: Bakelite

• What is Bakelite and how is it prepared?

Question 4c: Crystalline vs Amorphous Solids

• Write the differences between crystalline solids and amorphous solids.

Question 4d: Equivalent Conductances

• Calculate the equivalent conductance of NH4OH at infinite dilution, given the equivalent conductances of NH4Cl, NaOH, and NaCl at infinite dilution.

Question 4e: n-type and p-type Semiconductors

• What are n-type and p-type semiconductors? Discuss.

Question 4f: Coloured Transitional Elements

• Why do transitional elements form colored compounds?

Question 4g: Isomeric Amines of C3H9N

• Write the structural formulae of all the isomeric amines with molecular formula C3H9N and classify them.

Question 4h: Interhalogen Compounds

• What are interhalogen compounds? Explain with two examples.

Question 4i: Reimer-Tiemann Reaction

• What is the Reimer-Tiemann reaction? Write the equation.

Question 4j: Nucleic Acids

• What are nucleic acids? Write two important functions of nucleic acids.

Group C

• Answer any three questions of the following.

Question 5a: Faraday’s Laws of Electrolysis

• Write short notes on: Faraday's laws of electrolysis.

Question 5b: Electrophoresis

• Write short notes on: Electrophoresis.

Question 6: First-Order Reaction

• Derive an expression for the rate constant of a first-order reaction and if the half-life is 90 seconds, calculate rate constant.

Question 7: Benzene Diazonium Chloride from Aniline.

• How is benzene diazonium chloride prepared from aniline and how Nitrobenzene and Benzene are prepared from it.

Question 8: Iron Ores

• Name two important ores of iron and extraction of iron from haematite ore.

Question 9: Benzoic Acid From Toluene

• How can you prepare benzoic acid from toluene? Include its reaction with NH3 and PCl5. Also, give some uses of benzoic acid.