List of top Questions asked in Bihar Board Class X Exam

What is hormone?
What is the role of petals in flowers?
What is environment?
What is glycolysis?
Define nutrition.
Define pollination. Write the effect of rainfall on pollination.
Write about five important sexually transmitted diseases, their causal pathogens, and symptoms.
What is covalent bond? Give two examples of it.
What is an ore?
Why is it necessary to balance a chemical equation?
Why does the aqueous solution of an acid conduct electricity?
What is corrosion? Explain with example.
Write the steps involved in the extraction of metals from ores.
Briefly describe the benefits of rainwater harvesting.
What is sinoauricular node?
What is ozone? Explain its importance.
What is a non-renewable source of energy? Give two examples of it.
Explain scattering of light.
Which quantity remains constant in Ohm's law, when temperature is constant? Explain.
Write any two properties of magnetic field lines.
How does the eye control the amount of light entering into it?
Prove for a concave mirror \[ \frac{1}{v} + \frac{1}{u} = \frac{1}{f} \]
What is the source of energy of the sun? Explain.
How is the concentration of OH\(^-\) ion affected on adding a base in excess to sodium hydroxide solution?
Mention two reactions that displace chlorine from bleaching powder by giving equations.