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 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 ?
CFC is widely used in
How many isomers of butane are possible ?
The genetic structure of an organism is called
The evolution of organisms by natural selection is called
The shape of methane molecule is
The chemical which shows biomagnification is
Primary consumers are called
Which of the following is an effective measure used in family planning?
What is the meaning of atavism ?
The unit of resistivity in a conductor is
The filament in an electric bulb is made of which of the following metals?
How many calories are there in 1 joule ?
The decreased accommodative ability of the eye causes
To an astronaut standing on the moon, the sky appears to be
For a healthy human eye, the near point and far point are respectively
An example of vegetative propagation through leaves is
If the focal length of the lens is f and power is P then
Plant hormone is called
Which part of camera acts like the retina of the eye ?
From where does urea enter the blood ?