List of top Questions asked in Bihar Board Class X Exam

When magnesium ribbon is ignited, the flame produced by it is:
The molecular formula of ethane is C$_2$H$_6$. It has:
The chemical substance used as a cast for setting broken bones in surgery is:
What is the effect of deforestation on wildlife?
Write the importance of reproduction in living beings.
Explore the difference between blood and lymph.
What is external respiration?
Why do we sweat in summer?
What is photosynthesis? Write the equation of its chemical reaction.
What is bio-magnification?
What is the role of stomata and lenticels in respiration?
What is ascent of sap?
What are the essential steps for forest conservation?
Why does carbon mainly form covalent compounds?
What is the difference between displacement and double displacement reactions? Write equations for these reactions.
Name the sodium compound which is used for softening hard water.
What is Anodising?
Write two differences between minerals and ores.
The aqueous solution of sodium carbonate is alkaline. Why?
Write down the laboratory method of preparation of methane and its chemical reaction with chlorine.
What do you mean by power of a lens? Write its SI unit.
What is a simple microscope? Draw its ray diagram.
What is the law of refraction of light?
What do you understand by 'short-circuit'?
How is the resistance of a wire affected by its area of cross-section?