Here is very important Class 12 Chemistry Guess 2025. Following chapters are included in the 2025 scheme of study.

Class12 Chemistry Short questions (Guess)

Class12 Chemistry Long questions (Guess)

Class12 Chemistry (full book solved short questions and long questions)

If you are interested for solved short question from chapter 3,4,5,14,15,16. All important board questions are available.

And if you are looking for long questions and notes like stuff, they are available.

Chapter 1

1. State Mendeleev’s periodic law what are the improvements made in Mendeleev’s periodic table.
2. Define ionization energy / Ionization potential.
3. Define hydration energy give its trends in periodic table.
4. Justify the position of hydrogen in periodic table, also discuss the similarities and differences of hydrogen with other relevant groups.

Chapter 2

1. Write peculiar behaviors of lithium in its group.
2. Describe commercial preparation of sodium metal by down’s cell.
3. Write commercial method of the preparation of sodium hydroxide by diaphragm cell.
4. Give 4 applications of lime in agriculture and in industry.

Chapter 5

1. What are commercial uses of halogens and their compounds
2. Write down the preparation of bleaching powder (Hasenclever’s method and Beckman’s method).
3. Explain peculiar behavior of fluorine.
4. What is disproportionation reaction. Explain reactions of chlorine with cold and hot sodium hydroxide.

Chapter 6

1. Write down the properties of transition metals. Two properties are important, the Para-magnetism and color.
2. Describe manufacturing of wrought iron from Coast iron.
3. Describe the Bessemer’s process for manufacturing of steel.
4. Define corrosion, Explain electrochemical theory of corrosion in detail. (most important)

Chapter 7

1. Define cracking of petroleum also discuss catalytic and steam cracking
2. Explain reforming of petroleum (gasoline) with example.
3. What is hybridization explain its different types with examples.
4. Define isomerism explain its different types. (Geometrical isomerism is more important)

Chapter 8

1. Write down the preparation of alkane by Kolbe’s electrolysis process.
2. Describe any 4 methods of preparation of alkenes.
3. Explain the polymerization of Acetylene with examples.
4. Prepare the followings. Benzene, chloroprene, glyoxal, oxalic acid, acetylides (from ethyne).

Chapter 9

1. Explain modern structures of benzene on the basis of atomic orbital treatment.
2. Describe stability of benzene molecule by estimation heat of hydration.
3. Right reaction and mechanism of
   1. Nitration of benzene.
   1. Sulphonation of benzene
   1. Alkylation and acylation of benzene (more important)
4. Discuss 2 industrial and two laboratory methods to prepare benzene.

Chapter 11

1. How ethanol is prepared from molasses and starch (fermentation)? Write with balance equations.
2. Prepare followings from phenol. (Bakelite, benzene, phenylacetate, TNT)
3. Write down any 2 reactions from the following types when alcohol reacts.
   1. When C-O bond breaks
   1. When O-H bond breaks.
4. Write down two methods of preparation of (methanol, Phenol, ether)
   Question will be asked for only one preparation, methanol preparation is more important.

Chapter 12

1. Describe the mechanism of aldol condensation reaction. Why formaldehyde does not give this reaction?
2. Explain Cannizzaro’s reaction with the help of mechanism. Which aldehydes give this reaction?
3. How acetaldehyde is prepared in laboratory by two different methods. Show along with label diagram.
4. Write reactions of carbonyl compounds (aldehyde and ketones) with the followings.
   (HCN, NaHSO₃, iodine, NaBH₄, NH₂-R)

Chapter 13

1. Write the reactions and mechanisms of acetic acid with (alcohol more important, ammonia, SOCl₂).
2. Write any 4 methods to prepare carboxylic acids.
3. Write down the brief explanation of amino acid and its preparation.
4. Convert acetic acid into (methane, acetyl chloride, acetic anhydride)

Also do important organic conversions, All are given here at one place.