List of top Science Questions asked in Bihar Board X

The valency of carbon in organic compounds is
A group of rays is called
Which of the following is saturated hydrocarbon ?
IUPAC name of ethylene is
Which was a defect of Mendeleev's periodic table ?
The shape of methane molecule is
The genetic structure of an organism is called
The evolution of organisms by natural selection is called
Primary consumers are called
How many isomers of butane are possible ?
CFC is widely used in
The chemical which shows biomagnification is
The filament in an electric bulb is made of which of the following metals?
Which of the following is an effective measure used in family planning?
The unit of resistivity in a conductor is
What is the meaning of atavism ?
How many calories are there in 1 joule ?
For a healthy human eye, the near point and far point are respectively
To an astronaut standing on the moon, the sky appears to be
Which part of camera acts like the retina of the eye ?
Plant hormone is called
The decreased accommodative ability of the eye causes
An example of vegetative propagation through leaves is
If the focal length of the lens is f and power is P then
Silicon is a/an