List of top Science Questions asked in Bihar Board X

Which one of the following is a metalloid?
Which one of the following is the natural source of oxalic acid?
The expulsion of water through stomata in the form of vapor from the aerial part of the plant is known as:
Peristalsis movement is found in:
Open circulatory system is found in:
The carrier of oxygen in blood is:
The tiger is a consumer of:
The place of origin of humans is:
The number of pairs of autosomes in humans is:
What is glycolysis?
Define nutrition.
What is the role of petals in flowers?
Define pollination. Write the effect of rainfall on pollination.
What is environment?
Write about five important sexually transmitted diseases, their causal pathogens, and symptoms.
What is hormone?
DNA is the basis of heredity. How?
Why does the aqueous solution of an acid conduct electricity?
What is sinoauricular node?
What is ozone? Explain its importance.
Briefly describe the benefits of rainwater harvesting.
Why is it necessary to balance a chemical equation?
What is covalent bond? Give two examples of it.
What is an ore?
What is corrosion? Explain with example.