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

Which mirror always forms an image smaller than the object?
The speed of light in air as compared to vacuum is
The light rays travel in
Which type of mirror is a concave mirror ?
Which of the following compounds would be the most basic ?
IUPAC name of ethylene is
The valency of carbon in organic compounds is
Which was a defect of Mendeleev's periodic table ?
A group of rays is called
Which of the following is saturated hydrocarbon ?
Who among the following propounded the laws of octave ?
The shape of methane molecule is
How many isomers of butane are possible ?
Primary consumers are called
CFC is widely used in
The chemical which shows biomagnification is
The genetic structure of an organism is called
The evolution of organisms by natural selection is called
The filament in an electric bulb is made of which of the following metals?
The unit of resistivity in a conductor is
What is the meaning of atavism ?
Which of the following is an effective measure used in family planning?
How many calories are there in 1 joule ?
The decreased accommodative ability of the eye causes
An example of vegetative propagation through leaves is