HPBOSE CLASS 12 Chemistry Exam Pattern 

According to the analysis of the model papers available on the HPBOSE website for the Class 12 HP Board Chemistry Examination, the following is the exam pattern;

Section	Type of Questions	Number of Questions	Marks per Question	Total Marks
Section A	Multiple Choice Questions	12	1	12
Section B	Short Answer Questions	9	2	18
Section C	Structured Questions	2	3	6
Section D	Long Answer Questions	5	5	25
Total		29		60

HPBOSE CLASS 12 Chemistry Marking Scheme

Unit No.	Title	Marks
Unit I	Solid State	04
Unit II	Solutions	03
Unit III	Electrochemistry	06
Unit IV	Chemical Kinetics	04
Unit V	Surface chemistry	04
Unit VI	General Principles and processes of Isolation Elements	03
Unit VII	p-Block Elements	06
Unit VIII	d- and f-Block Elements	05
Unit IX	Coordination Compounds	03
Unit X	Haloalkanes and Haloarenes	05
Unit XI	Alcohols, Phenols and Ethers	02
Unit XII	Aldehydes, Ketones and Carboxylic acids	03
Unit XIII	Organic Compounds containing Nitrogen	02
Unit XIV	Biomolecules	03
Unit XV	Polymers	03
Unit XVI	Chemistry in Everyday life	04
	Total	60

HP Board 12th Chemistry Syllabus 2024

Unit I: Solid State

Classification of Solids based on different binding forces: molecular, ionic covalent and metallic solids, amorphous and crystalline solids (elementary idea), unit cell in two dimensional and three dimensional lattices, calculation of density of unit cell, packing in solids, voids, number of atoms per unit cell in a cubic unit cell, point defects, electrical and magnetic properties.

Unit II: Solutions

Types of solutions, expression of concentration of solutions of solids in liquids, solubility of gases in liquids, solid solutions, colligative properties-relative lowering of vapour pressure, elevation of B.P. depression of freezing point, osmotic pressure, determination of molecular masses using colligative properties, abnormal molecular mass.

Unit III: Electrochemistry

Redox reactions, conductance in electrolytic solutions, specific and molar conductivity variations of conductivity with concentration, Kohlrausch’s Law, electrolysis and laws of electrolysis (elementary idea), dry cell. Electrolytic cells and Galvanic cells; lead accumulator, EMF of a cell standard electrode potential, Nernst equation and its application to chemical cells, fuel cells; corrosion.

Unit IV: Chemical Kinetics

Rate of a reaction (average and instantaneous), factors affecting rates of reaction; concentration, temperature, catalyst; order and molecularity of a reaction; rate law and specific rate constant, integrated rate equations and half life (only for zero and first order reactions); concept of collision theory (elementary idea, no mathematical treatment)

Unit V: Surface Chemistry

Adsorption- physisorption and chemisorptions factors affecting adsorption of gases of solids; catalysis : homogenous and heterogeneous activity and selectivity : enzyme catalysis; colloidal state : distinction between true solutions colloids and suspensions; lyophilic, lyophobic multimolucular, and macromolecular colloids; properties of colloids; Tyndall effect, Brownian movement, electrophoresis, coagulation; emulsion- types of emulsions.

Unit VI: General Principles and Processes of Isolation of Elements

Principles and methods of extraction- concentration, oxidation, reduction, electrolytic method and refining; occurrence and principles of extraction of aluminum, copper, zinc and Iron.

Unit VII: p-Block Elements

Group 15 Elements: General introduction, electronic configuration, occurance oxidation states, trends in physical and chemical properties; nitrogen- preparation, properties and uses : compounds of nitrogen; preparation, properties of ammonia and nitric acid, oxides of nitrogen (structure only); Phosphorous-allotropic forms : compounds of phosphorous: preparation and properties of phosphine, halides (PCl₃, PCl₅) and oxoacids (elementary idea only)

Group 16 Elements: General introduction, electronic configuration, oxidation states, occurrence, trends in physical and chemical properties; dioxygen: preparation, properties and uses; simple oxides; Ozone. Suphur-allotropic forms; compounds of sulphure : preparation, properties and uses of sulphure dioxide: sulphuric acid: industrial process of manufacture, properties and uses, oxoacids of sulphur (structures only).

Group 17 Elements: General introduction, electronic configuration, oxidation states, occurrence, trends in physical and chemical properties; compounds of halogens : Preparation, properties and uses of chlorine and hydrochloric acid, inter halogen compounds, oxoacids of halogens (structure only)

Group 18 Elements: General introduction, electronic configuration. Occurrence, trends in physical and chemical properties, uses.

Unit VIII: d and f-Block Elements

General introduction, electronic configuration, occurrence and characteristics of transition metals, general trends in properties of the first row transition metals – metallic character, ionization enthalpy, oxidation. States, ionic radii, colour catalytic property, magnetic properties, interstitial compounds, alloy formation. Preparation and properties of K₂Cr₂O₇ and KMnO₄.

Lanthanoids- Electronic configuration, oxidation states, chemical reactivity and Lanthanoid contraction.

Actinoids- Electronic configuration, oxidation states.

Unit IX: Coordination Compounds

Coordination Compounds – introduction, ligands and coordination number, colour, magnetic properties and shapes, IUPAC nomenclature of mononuclear coordination compounds. Bonding; isomerism, importance of coordination compounds (in qualitative analysis, extraction of metals and biological system).

Unit X: Haloalkanes and Haloarenes

Haloalkanes:

Nomenclature, nature of C-X bond, physical and chemical properties, mechanism of substitution reactions.

Haloarenes:

Nature of C-X bond, substitution reactions (directive influence of halogen for monosubstituted compounds only)

Uses and environment effects of –dichloromethane, trichloromethane, tetrachloromethane, iodoform, freons, DDT.

Unit XI: Alcohols, Phenols and Ethers

Alcohols: Nomenclature, methods of preparation, physical and chemical properties (of primary alcohols only); identification of primary, secondary and tertiary alcohols; mechanism of dehydration, uses, some important compounds-methanol and ethanol.

Phenols: Nomenclature, methods of preparation, physical and chemical properties, acidic nature of phenol, electrophillic substitution reactions, uses of phenols.

Ethers: Nomenclature, methods of preparation, physical and chemical properties, uses.

 Unit XII Aldehydes, Ketones and Carboxylic Acids

Aldehydes and Ketones: Nomenclature, nature of carbonyl group, methods of preparation, physical and chemical properties and mechanism of nucleophilic addition, reactivity of alpha hydrogen in aldehydes; uses.

Carboxylic Acids: Nomenclature, acidic nature, methods of preparation, physical and chemical properties; uses.

Unit XIII: Organic Compounds containing Nitrogen

Animes: Nomenclature, classification, structure, methods of preparation, Physical and chemical properties, uses, identification of primary, secondary and tertiary amines.

Cyanides and Isocyanides: Will be mentioned at relevant places in context.

Diazonium Salts: Preparation, chemical reactions and importance in synthetic organic chemistry.

Unit XIV: Biomolecules

Carbohydrates: Classification, (aldoses and ketoses) monsaccharides, (glucose and fructose),oligosaccharides (sucross, lactose, maltose), polysaccharides (sarch, cellulose, glycogen); importance.

Proteins: Elementary idea of α-amino acids: peptide bond, polypeptides, proteins, primary structure, secondary structure, tertiary structures and quaternary structure (qualitative idea only), denaturation of proteins: enzymes.

Vitamins: Classification and functions

Nucleic Acids: DNA & RNA.

Unit XV: Polymers

Classification: natural and synthetic, methods of polymerization (addition and condensation), copolymerization. Some important polymers: natural and synthetic like polythene, nylon, polyesters, Bakelite, rubber.

Unit XVI: Chemistry in Everyday life

1. Chemicals in medicines: analygesics, tranquilizers, antiseptics, disinfectants, antimicrobials, antifertility drugs, antibiotics, antacids, antihistamines.
2. Chemicals in food: preservatives, artificial sweetening agents.
3. Cleansing agents: soaps and detergents, cleansing action.

PRACTICAL

EVALUATION SCHEME FOR EXAMINATION	MARKS
Volumetric Analysis	07 Marks
Salt Analysis	05 Marks
Content Based Experiment	02 Marks
Class Record and Viva	03 Marks
Investigatory Project	03 Marks
Total	20 Marks

PRACTICAL SYLLABUS

1. Surface Chemistry

(a) Preparation of one lyophilic and one lyophobic sol. Lyophilic sol-Starch, egg albumin and gum.

Lyophobic sol-aluminum hydroxide, ferric hydroxide, arsensious sulphide.

(b) Study of the role of emulsifying agent in stabilizing the emulsions of different oils.

2. Chemical Kinetics

(a) Effect of concentration and temperature on the rate of reaction between sodium thiosulphate and hydrochloric acid.

(b) Study of reaction rates of any one of the following:

(i) Reaction of iodide ion and with hydrogen peroxide at room temperature using different concentration of iodide ions.

(ii) Reaction between potassium iodate, KIO₃ and sodium sulphite: (Na₂ SO₃) using starch solution as indicator (clock reaction).

3. Thermochemistry

(a) Any one of the following experiments:

(i) Enthalpy of dissolution of copper sulphate or potassium nitrate.

(ii) Enthalpy of neutralization of strong acid (HCl) and strong base (NaOH)

(iii) Determination of enthalphy change during interaction (Hydrogen bond formation) between acetone and chloroform.

4. Electochemistry

Variation of cell potential in Zn/Zn²⁺ǁCu²⁺/Cu with change in concentration of electrolytes (CuSO₄ or ZnSO₄) at room temperature.

5. Chromatography

 (i) Separation of pigments from extracts of leaves and flowers by pap chromatography and determination of Rf values.

(ii) Separation of constituents present in an inorganic mixture containing cations only (constituents having wide difference in Rf values to be provided)

6. Preparation of Inorganic Compounds

(i) Preparation of double salt of ferrous ammonium sulphate or potash alum.

(ii) Preparation of potassium ferric oxalate.

7. Preparation of Organic Compounds

Preparation of any two of the following compounds

(i) Acetanilide

(ii) Di-benzal acetone

(iii) p-Nitroacetanilide

(iv) Aniline yellow or 2-Napthol aniline dye.

(v) Iodoform

8. Test for the functional groups present in organic compounds:

 Unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic and amino (primary groups)

1. Study of Carbohydrates, fats and proteins in pure form and detection of their presence in given food stuffs.

2. Determination of concentration/molarity of KMnO₄ solution by titrating it against a standard solution of :

(i) Oxalic acid

(ii) Ferrous ammonium sulphate.

(Students will be required to prepare standard solutions by weighing themselves)

9. Qualitative analysis

• Determination of one cation and one anion in a given salt

Cations- Pb²⁺, Cu²⁺,As³⁺, Al³⁺, Fe³⁺, Mn²⁺, Zn²⁺, Co²⁺, Ni²⁺, Ca²⁺, Sr²⁺, Ba²⁺, Mg²⁺, NH⁴⁺

Anions- CO₃^2-, S^2-, SO₃²-, SO₄^2-, NO₂, NO₃, Cl^-, Br^-, I^-, PO₄^3-; C₂O_4^2-, CH₃COO^-

(Note Insoluble salts excluded)

PROJECT:

Scientific investigations involving laboratory testing and collecting information from other sources.

A Few suggested Projects

Study of presence of oxalate ions in guava fruit at different stages of ripening. Study of quantity of casein present in different samples of milk.

Preparation of soybean milk and its comparison with the natural milk with respect to curd formation, effect of temperature, etc.

Study of the effect of potassium bisulphate as food preservative under various conditions (temperature, concentration, time etc.)

Study of digestion of starch by salivary amylase and, effect of PH and temperature on it. Comparative study of the rate of fermentation of following materials; wheat flour, gram flour, Potato juice, carrot juice etc.

Extraction of essential oils present in Saunf (anised), Ajwain (carum), Illaichi (cardomam).

Study of common food adulterants in fat, oil, butter, sugar, turmeric powder, chilli powder and pepper.

Note: Any other investigatory project, which involves about 10 period of work, can be chosen with the approval of the teacher. 

HPBOSE Class 12 Chemistry Syllabus 2023-2024 - Download PDF