List of top Science Questions asked in Bihar Board Class X Exam

The substances which get decomposed by biological process are
Which disease may primarily be caused in humans by ultraviolet (UV) rays of the Sun?
Which quantity is electric potential?
The action of an electric motor is based on
Waste can be managed by which of the following?
The correct food chain is
At what stage of foetus does safe abortion occur?
Which of the following is an artificial ecosystem?
Which substance cannot be decomposed in the environment?
The hormone that controls the symptoms of puberty in adolescents is
Differentiate between metals and non-metals on the basis of physical and chemical properties.
What is called absolute refractive index ?

The changes that occur during adolescence are called
 

Explain recycling of waste materials with examples.
What is photosynthesis ? Describe it with a suitable diagram.
Define respiration.
What is excretion ? Write the names of its two main parts.
Write the names of four organelles of a cell.
How is DNA the basis of heredity ?
What are the harmful effects of aerosol chemicals ?
What is phototropism ?
What is pollination ?
What is the difference between xylem and phloem ?
What do you understand by short and long periods of periodic table ?
What is an indicator ? Write the name of an indicator.