List of top Science Questions asked in Bihar Board X

In which of the following organisms does asexual reproduction occur through budding?
Depletion of ozone layer is due to:
The SI unit of resistance is:
Which energy does a hydro-electric power plant convert into electric energy?
On moving from focus towards the pole, the magnification in a concave mirror:
The image of an ant in a concave mirror is erect and goes on increasing as the ant moves along the principal axis. The direction of motion of the ant is:
A rectangular coil of copper wire is rotated in a magnetic field. The direction of the induced current in the coil changes after:
The magnification produced by a concave mirror of focal length 10 cm is positive, if the value of object distance is:

The alloy consisting of 90% Cu and 10% Sn is named as

What is the common name of CaOCl2?

What is nuclear fission?
How does a light ray proceed in a lens? Show by a diagram.
What is the source of energy of the Sun?
Which of the following is an example of regeneration?
The tiger is a consumer of
The forelimbs of man, cat and bat are
The genic constitution of an individual organism is called
Bile juice is secreted by
Boron and aluminium belong to which group of elements in periodic table?
$\mathrm{Fe_2O_3 + 2Al \rightarrow Al_2O_3 + 2Fe$ is which of the following types reaction?}
Carbon combines with hydrogen to form
Which pigment makes the colour of urine yellow?
Bauxite is an ore of which of the following metals?
The correct order of reactivity of metals is
What is the atomic weight of oxygen?