List of top Science Questions asked in Bihar Board X

The atomic number of sodium is:
The atomic number of magnesium is 12. What is its valency?
What is the chemical formula of ethyl alcohol?
Within which pH range does our body work?
Which of the following metals is displaced from its salt solution by iron?
Which one of the following is a clean energy source?
The general formula of an alkene is:
Which of the following gases is used in welding?
The absolute refractive index of air is actually:
Mirror used by ENT (Ear-Nose-Throat) doctor is:
Which of the following acids is found in vinegar?
The process of coating a layer of zinc on iron is called:
The chemical formula of Chalk is:
Which of the following metals is the most ductile?
A metal reacts with oxygen to form a compound with high melting point. This compound is soluble in water. Which of the following elements can it be?
Malachite is an ore of which metal?
The functional group \( >CO \) is called:
How many structural isomers of pentane, having molecular formula \( C_5H_{12} \) are possible?
Which of the following is necessary to obtain nuclear energy?
The maximum value of magnification in a convex mirror is
Out of a combination of resistors, one resistor is removed and it is found that the net resistance has increased. The resistor was connected in
Two appliances rated as (60 W, 200 V) and (40 W, 200 V) are connected across a 100 V supply in a room. The total power consumed is
Which of the following expressions represent(s) electric power in the circuit?
Potential difference is measured by
Which of the following statements is true?