List of top Questions asked in Bihar Board XII- 2025

Arabica is associated with
What are the importances of salt bridge in an electrochemical cell?
Which of the following rivers is the most polluted?
The direction of flow of Luni river is
Write IUPAC names of the following compounds:
Differentiate between Electrochemical cell and Electrolytic cell.
What are carbohydrates? How are they classified?
Differentiate between DNA and RNA.
What do you understand by concentration of an ore? Discuss the different methods of concentration of ores.
What are nucleic acids?
Why is nitrogen molecule less reactive?
Explain Raoult’s law. How would you distinguish between ideal and non-ideal solutions on its basis?
What happens when n-butyl chloride reacts with alcoholic KOH?
What do you understand by elevation of boiling point?
Why are alcohols more soluble in water than alkanes of the same molecular weight?
Distinguish between Alcohol and Phenol.
Write Arrhenius equation.
How would you prepare ethane from methyl iodide?
How would you prepare iodoform from acetylene?
What are chiral and achiral compounds?
Write Faraday’s 2nd law of Electrolysis.
What is slag?
What are essential amino acids?
What are macromolecules?
What is metamerism?