List of top Questions asked in Bihar Board Class X Exam

Boron and aluminium belong to which group of elements in periodic table?
Which pigment makes the colour of urine yellow?
A prism is bounded by how many surfaces?
The atomic number of potassium is 19. What is the valency?
What is the general formula of an alkane?
What is the atomic number of fluorine?
A solution turns red litmus into blue. The pH value of this solution would be:
What is the atomic weight of oxygen?
What is the refractive index of diamond?
The magnification (m) in a concave lens is equal to:
Which of the following organic compounds is an alkyne?
The focal length of which mirror is taken as negative according to the convention of signs?
Where is the object placed to form a magnified virtual image in a concave mirror?
How many laws of refraction of light are there?
What is the value of refractive index of a medium?
What is the S.I. unit of power of lens?
Iodized salt is:
How many bonds are there between two atoms of one molecule of oxygen gas?
What is Philosopher’s wool?
The sodium salts of higher fatty acids are called
Which of the following is a symbol of carbonyl group?
Which solution is used to test the presence of starch?
Rate of photosynthesis is dependent on which factors?
If several resistances are parallel, their equivalent resistance will be:
The pores of the stomata are surrounded by which of the following?