Maharashtra Board conducts the Class 10 and 12 Board Exams, and the syllabus gets designed to be at par with international standards. This article will elaborate on the finer details of Chemistry. This subject has to be learned through observation and experiments to make all doubts regarding the subject’s syllabus for Class 12 clear. A thorough understanding of the concepts taught in 10th and 11th is necessary to do well in Chemistry Class 12 Boards.
Given below is the blueprint of the Academic year- 2021 to 2022 Class 12 Chemistry syllabus:
Distribution of Marks According to Type of Questions,
| Type of Questions | Marks | Marks with Options | Percentage % |
| Objectives | 14 Marks | 14 Marks | 20 Percentage |
| Short Answer | 42 Marks | 56 Marks | 60 Percentage |
| Brief Answers | 14 Marks | 28 Marks | 20 Percentage |
| Total | 70 Marks | 98 Marks | 100 Percentage |
Distribution of Marks of MH Board Class 12 Chemistry
| Sr. No | Units | Sub- topics | Mark Without Option | Mark With Option |
| 1 | Solid State- | Classification of solids, unit cell in 2 & 3 dimensional lattices, calculation of density, voids, point defects, electrical and magnetic properties, Band theory of metals, conductors, semiconductors, insulators and n-p type semiconductors. | 04 Marks | 06 Marks |
| 2 | Solutions and Colligative Properties | Types of solutions, concentration of solids in liquids, Raoult’s law etc | 05 Marks | 07 Marks |
| 3 | Chemical Thermodynamics and Energetic | Work, heat, energy, First law of thermodynamics, Hess’ law of constant heat etc | 06 Marks | 08 Marks |
| 4 | Electrochemistry | Kohlrausch’s Law, lead accumulator, dry cell –electrolytic and galvanic cells, EMF, fuel cells, Nernst equation | 05 Marks | 07 Marks |
| 5 | Chemical Kinetics | Activation energy, rate law and specific rate constant, Arrhenius equation, concept of collision theory, etc | 04 Marks | 06 Marks |
| 6 | General Principles and Processes ofIsolation of Elements1 | Principles and methods of extraction, reduction electrolytic method and refining | 03 Marks | 05 Marks |
| 7 | p-Block Elements | Group 15 elements, Group 16 elements, Classification of oxides, Group 17 elements, Group 18 elements, etc. | 08 Marks | 10 Marks |
| 8 | d and f – Block Elements | Lanthanide, Actinoids, first row transition metals, interstitial compounds, alloy formation | 05 Marks | 06 Marks |
| 9 | Coordination Compounds | IUPAC nomenclature, Werner’s theory, coordination number, magnetic properties, VBT, CFT. isomerism, | 03 Marks | 04 Marks |
| 10 | Halogen Derivatives of Alkanes and Arenes | Haloalkanes, Haloarenes, stability of carbocations, d-l and R-S configurations. | 04 Marks | 06 Marks |
| 11 | Alcohols, Phenols and Ethers | Nomenclature, physical and chemical properties, methods of preparation, etc | 04 Marks | 06 Marks |
| 12 | Aldehydes, Ketones and Carboxylic Acids | Nomenclature, physical and chemical properties, methods of preparation, etc | 05 Marks | 07 Marks |
| 13 | Compounds Containing Nitrogen | Amines, Diazonium salts, Cyanides and isocyanides, etc | 04 Marks | 06 Marks |
| 14 | Biomolecules | Carbohydrates, Proteins, Vitamins, Nucleic acids, etc | 04 Marks | 06 Marks |
| 15 | Polymers | Classification, methods of polymerization, copolymerization, polythene, bakelite, nylon, polyesters, and rubber, Biodegradable, non-biodegradable polymers | 03 Marks | 04 Marks |
| 16 | Chemistry in Everyday Life | Chemicals in medicines, Chemicals in food, Cleansing agents | 03 Marks | 04 Marks |
From the above table, it is understood that Units 3, 7, and 12 have the highest weightage and hence must get more time to study. The rest of the units also need attention as per the marks allotted. Typically, Chemistry papers are not challenging but tricky, as reported by students in previous years. So an intelligent approach to studying Chemistry must be developed, keeping the syllabus in mind. Also, the subject demands a fair amount of memorization, but the clarity of concepts needs to be there. The Theory paper is for 70 Marks and the total time allotted to solve it is 3 Hrs. The question paper gets divided into four sections.
1. Section A: Q. No.1 contains Ten multiple-choice types of questions carrying One mark each.
Q. No. 2 contains Eight very short answer types of questions carrying One mark each.
2. Section B: Q. No.3 to Q. No. 14 are Twelve short answer types of questions carrying Two marks each. (Attempt any Eight).
3. Section C: Q. No. 15 to Q. No.26 contain Twelve short answer types of questions carrying Three marks each. (Attempt any Eight)
4. Section D: Q. No. 27 to Q. No. 31 are Five long answer types of questions carrying Four marks each. (Attempt any Three)
Chemistry Practical HSC Syllabus – Std. 12th Maharashtra HSC Board
A. Chemical Kinetics
(Any one of the following) :
(a) Effect of concentration and temperature on the reaction rate between sodium thiosulphate and hydrochloric acid.
(b) Study of reaction rate of any one of the following:
(i) Reaction of iodide ions with hydrogen peroxide at room temperature using different concentrations of iodide ions.
(ii) Reaction between potassium iodate, KIO3, and sodium sulfite (Na2 SO3 ) using starch solution as an indicator (clock reaction).
(c) Acid hydrolysis of ethyl acetate.
B. Thermochemistry
Any one of the following experiments:
i] Enthalpy of dissolution of copper sulfate or potassium nitrate.
ii] Enthalpy of neutralization of strong acid (HCl) and strong base (NaOH).
iii] Determination of enthalpy change during interaction (hydrogen bond formation) between acetone and chloroform.
iv] Heat of displacement of Cu from CuSO4 by Zinc.
C. Electrochemistry
Variation of cell potential in Zn|Zn2+||Cu2+|Cu with change in concentration of electrolytes (CuSO4 or ZnSO4) at room temperature (demonstration).
D. Chromatography (demonstration)
(i) Separation of pigments from extracts of leaves and flowers by paper chromatography and Determination of Rf values.
(ii) Separation of constituents present in an inorganic mixture containing two cations only constituents having a significant difference in Rf values to be provided.
E. Preparation of Inorganic Compounds
(i) Preparation of double salt of ferrous ammonium sulfate of potash alum.
(ii) Preparation of potassium ferric oxalate.
F. Preparation of Organic Compounds
(i) p-Nitroacetanilide
(ii) Aniline yellow or 2- Naphthol aniline dye.
(iii) Iodoform
(iv) Phthalic or succinic anhydride.
(v) Dibenzalacetone
G. Tests for the functional groups present in organic compounds
Unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic, and amino (primary) groups.
H. Characteristic tests of carbohydrates, fats, and proteins in pure samples and their detection in given foodstuffs.
I. Determination of concentration/molarity of KMnO4 solution by titrating it against a standard solution of:
i) Oxalic acid
(ii) Ferrous ammonium sulfate (Students will be required to prepare standard solutions by weighing themselves).
J. Qualitative analysis
1) Determination of two cations from a given mixture of salts.
2) Determination of two anions from a given mixture of salts.
Cations – Pb2+, Cu2+, As3+, Al3+, Fe3+, Mn2+, Zn2+, Co2+, Ni2+, Ca2+, Sr2+, Ba2+, Mg2+,NH4+,
Anions – CO3 2-, SO3 2-, SO4 2-, NO2 – NO3, Cl–, Br–, I–, PO4 3- C2 O4 2- CH3 COO–
(Note: Insoluble salts excluded.)
PROJECT
Scientific investigations involving laboratory testing and collecting information from other sources.
A few suggested Projects:
1 Study of presence of oxalate ions in guava fruit at different stages of ripening.
2 Study the quantity of casein in different samples of milk.
3 Preparation of soyabean milk and its comparison with the natural milk for curd formation, effect of temperature, etc.
4 Study of the impact of potassium bisulfate as a food preservative under various conditions (temperature, concentration,n pr time, etc.).
5 Study of digestion of starch by salivary amylase and the effect of pH and temperature on it.
6 Comparative study of the fermentation rate of the following materials: wheat flour, gram flour, potato juice, carrot juice, etc.
7 Extraction of essential oils present in Saunf (aniseed), Ajwain (carum), Illaichi (cardamom).
8 Study typical food contaminants in fat, butter, sugar, turmeric powder, chili powder, and pepper.
FREQUENTLY ASKED QUESTIONS OF MH BOARD CLASS 12
Q1. What is the prerequisite for MH Board Chemistry Class 12?
Ans: The prerequisite for the class 12 course is the course followed in MH Board Class 10 and primarily Class 11.
Q2. What is the share of MCQs in the MH Board Class 12 question paper?
Ans: MCQs make for 20% of the paper,i.e., Ten questions carrying one mark each.
Q3. Which is the Unit in the syllabus from where maximum questions are asked?
Ans: Maximum number of questions for around 8-10 marks are asked from the 7th Unit on p-Block Elements.
Q4. How many practical assignments are listed in the syllabus?
Ans: Ten assignments are listed in the syllabus. Of course, the student can choose one from each type.
Q5. What is the basis of selecting the projects suggested in the syllabus?
Ans: The projects get selected based on scientific investigations involving laboratory testing and collecting information from other sources.