List of top Science Questions asked in Bihar Board X

CaCO\(_3\)(s) → CaO(s) + CO\(_2\)(g) is what type of reaction?
Which one of the following is a metalloid?
Draw a ray diagram to show refraction of light at both refractive surfaces of a prism placed in air.
Which of the following causes acid rain in industrial areas?
Which of the following equations is balanced?
Draw a labelled diagram of an electric bulb.
What is persistence of vision?
Which non-metal is found in liquid state at room temperature?
Propane, with the molecular formula \( C_3H_8 \), has:
If the lower half of a concave mirror gets broken, then the image:
When a ray of light travels from air (a rarer medium) to glass (a denser medium), it bends:
Ozone layer protects earth from which harmful radiation?
Which one of the following is the natural source of oxalic acid?
The general formula of alkyne is:
Which colour of light scatters more in the atmosphere?
What will be the nature of the image of an object, if the magnification of the image is negative?
How many laws are there for the reflection of light?
A ray of light is incident perpendicular to a plane mirror. The angle of reflection will be:
Converging lens in air is:
The far point for normal vision is:
How many bonds are there between two atoms in a nitrogen molecule?
Zinc blende is an ore of which metal?
What is the colour of silver iodide?
The hardest natural substance is:
How many crystalline allotropes of carbon are there?