List of top Questions asked in Bihar Board X - 2025

Which phenomenon exhibited by light is demonstrated in the twinkling of stars ?
In which state is the Kalpakkam Nuclear Power Plant located ?
The main component of domestic gas (LPG) is
The two non-renewable sources of energy are
Which type of reaction is respiration ?
Compounds formed by transfer of electrons are called
Which of the following reactions is an example of decomposition reaction ?
The light rays travel in
Which type of mirror is a concave mirror ?
Which of the following types of mirror is used in the headlight of a car ?
The focal length of a concave mirror is
Which mirror always forms an image smaller than the object?
The speed of light in air as compared to vacuum is
The valency of carbon in organic compounds is
Which of the following is saturated hydrocarbon ?
IUPAC name of ethylene is
Which was a defect of Mendeleev's periodic table ?
Who among the following propounded the laws of octave ?
Which of the following compounds would be the most basic ?
A group of rays is called
The genetic structure of an organism is called
The evolution of organisms by natural selection is called
The chemical which shows biomagnification is
Primary consumers are called
CFC is widely used in