A model/practice question paper (based on important questions) for Class 12 Chemistry is provided for the upcoming MP Board half-yearly examinations. It is based on the half-yearly examination syllabus and the official board pattern.
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Class 12 Chemistry Model/Practice Question Paper for Half-Yearly Examinations 2026-27 (MP Board)
Half Yearly Examination 2026-27
Class – 12th | Subject – Chemistry
Time: 3 Hours | Maximum Marks: 70
- All questions are compulsory.
- Question numbers 1 to 5 are objective type questions containing a total of 28 marks. Each question carries 1 mark.
- Question numbers 6 to 12 are very short answer type questions, carrying 02 marks each.
- Question numbers 13 to 16 are short answer type questions, carrying 03 marks each. Internal choices (OR) are provided in these questions.
- Question numbers 17 to 20 are long answer type questions, carrying 04 marks each. Internal choices (OR) are also provided in these questions.
- Draw neat and labeled diagrams and write chemical equations wherever necessary.
Q.1. Choose and write the correct option: (6 × 1 = 6 Marks)
-
What is the molarity of pure water?
(a) 55.5 M (b) 5.55 M (c) 18 M (d) 0.18 M -
The unit of specific conductivity is:
(a) ohm-1 (b) ohm-1 cm-1 (c) ohm cm-2 (d) ohm cm -
The unit of rate constant for a first-order reaction is:
(a) mol L-1 s-1 (b) s-1 (c) L mol-1 s-1 (d) mol-1 s-1 -
Which of the following elements is NOT a transition element?
(a) Fe (b) Co (c) Ni (d) Zn -
Lucas reagent is used for the testing of:
(a) Aldehydes (b) Ethers (c) Alcohols (d) Amines -
Which compound is known as the “Oil of Mirbane”?
(a) Aniline (b) Nitrobenzene (c) Picric acid (d) Chlorobenzene
Q.2. Fill in the blanks: (6 × 1 = 6 Marks)
- The number of moles of solute dissolved per litre of solution is called ………………….. .
- Acetic acid is a ………………….. electrolyte.
- The rate of a chemical reaction is ………………….. proportional to the concentration of reactants.
- The oxidation number of Iron in K4[Fe(CN)6] is ………………….. .
- Heating chlorobenzene with chlorine in the presence of FeCl3 in the dark yields ………………….. .
- The chemical nature of amines is ………………….. .
Q.3. Write True or False: (6 × 1 = 6 Marks)
- With the increase in temperature, the solubility of gases in liquids increases.
- Rusting of iron is an electrochemical phenomenon.
- The value of molecularity of a reaction can be zero.
- d-block elements form interstitial compounds.
- Phenol is acidic in nature.
- Aniline is completely soluble in water.
Q.4. Match the Columns correctly: (5 × 1 = 5 Marks)
| Column ‘A’ | Column ‘B’ |
|---|---|
| (1) Raoult’s Law | (A) Hinsberg Reagent |
| (2) Faraday’s First Law | (B) Coloured Compounds |
| (3) Mercuric Sulfide (HgS) | (C) Ideal Solution |
| (4) Primary Amine Test | (D) W = Z × I × t |
| (5) Oxidation of Primary Alcohol | (E) Carboxylic Acid |
Q.5. Answer in one word or one sentence: (5 × 1 = 5 Marks)
- What is a semi-permeable membrane?
- What is the unit of rate constant for a zero-order reaction?
- What type of ligand is EDTA?
- What is the major product obtained in the Sandmeyer reaction?
- Name the famous named reaction used to synthesize alkyl isocyanides.
Q.6. State Henry’s law and write any one limitation of it. (2 Marks)
Q.7. What is Kohlrausch’s law? Write one of its applications. (2 Marks)
Q.8. Distinguish between rate of reaction and rate constant (write any two differences). (2 Marks)
Q.9. What is lanthanide contraction? What are its causes? (2 Marks)
Q.10. Clearly mention two differences between a double salt and a coordination compound. (2 Marks)
Q.11. Write the chemical equation for Wurtz reaction. (2 Marks)
Q.12. Write the chemical equation for Williamson’s ether synthesis. (2 Marks)
Q.13. Write any three differences between an Ideal Solution and a Non-ideal Solution. (3 Marks)
OR
What are azeotropic mixtures? Explain their different types.
Q.14. Write any three differences between order of reaction and molecularity of a reaction. (3 Marks)
OR
Prove that the half-life period of a first-order reaction is independent of the initial concentration of the reactants.
Q.15. Why are nucleophilic substitution reactions of chlorobenzene difficult compared to haloalkanes? Give three reasons. (3 Marks)
OR
Write short notes on the following with proper chemical equations:
(i) Reimer-Tiemann reaction
(ii) Kolbe’s reaction
Q.16. Differentiate between primary, secondary, and tertiary amines based on any three structural characteristics or chemical tests. (3 Marks)
OR
Write the reaction mechanism and chemical equation involved in Gabriel phthalimide synthesis.
Long Answer Type Questions (Each question carries 04 Marks)
Q.17. Explain the construction and working of a Standard Hydrogen Electrode (SHE) with a neat diagram. Write two drawbacks of it. (4 Marks)
OR
What is an electrochemical series? Write its three main characteristics and two applications.
Q.18. Compare the elements of d-block and f-block on the basis of the following points:
(i) Electronic configuration (ii) Oxidation states (iii) Magnetic properties (iv) Variable valency (4 Marks)
OR
What is Crystal Field Theory (CFT)? Explain the explanation of colors in coordination compounds on its basis.
Q.19. Write only the chemical equations for the following reactions:
(i) Aldol Condensation
(ii) Cannizzaro Reaction
(iii) Rosenmund Reduction
(iv) Stephen Reaction (4 Marks)
OR
What happens when (write chemical equations only):
(i) Acetone is heated with chloroform in the presence of an alkali.
(ii) Formaldehyde reacts with ammonia.
(iii) Acetic acid reacts with phosphorus pentachloride (PCl5).
(iv) Benzaldehyde is heated with a concentrated solution of caustic soda (NaOH).
Q.20. Write four major structural and chemical test differences between phenol and alcohol. (4 Marks)
OR
Explain the nitration and bromination reactions of aniline with chemical equations. Why is the direct nitration of aniline difficult to carry out?
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