List of top Questions asked in CBSE CLASS XII- 2025

Vinyl group directly attached with carboxylic acid should decrease acidity due to resonance, but it increases acidity. Explain.
Give reasons for the following:HCHO is more reactive than CH$_3$CHO towards addition of HCN.
Give reasons for the following:
Benzoic acid does not undergo Friedel-Crafts reaction.
Peptide linkage and Glycosidic linkage
Essential amino acids and Non-essential amino acids
Write two differences between Amylose and Amylopectin components of starch.
What is meant by negative deviation from Raoult’s law? Give an example. What type of azeotrope is formed by negative deviation?
Which of the following solution in water will have the lowest freezing point?
Among the following outermost electronic configurations of transition metals, which one shows the highest oxidation state?
What is cold sterilization ? List out the irradiation requirements for onions, potatoes, garlic and shallots, along with the purpose.
With the help of a flowchart, describe a method of cucumber pickles preparation.
What is bio-pesticide ? Classify the various bio-pesticides with example.
List out the main principles of organic farming.
Explain the different methods of fertilizer application.
Explain the various types of wheat flour and their use(s).
Why is there a need to preserve fruits and vegetables ?
Briefly explain any three ways to evaluate the fertility of the soil.
List out any two constraints faced by farmers in organic farming.
Briefly explain about degreening in fruits.
Write two advantages of sprinkler irrigation.
Name the various methods to judge the end point during jelly preparation.
Write two disadvantages of broadcasting method of fertilizer application.
Write any two qualities of a successful entrepreneur.
Describe the green jobs in eco-tourism.
Write the steps to insert a new slide in a presentation.