List of top Science Questions asked in Bihar Board X

The IUPAC name of CH$_3$CH$_2$CH$_2$OH is
Which of the following compounds can be used as fuel?
The electrical resistivity of silver at 20$^\circ$C is
What will be the resistance of the wire when its length increases?
From which of the following does the induced current get direction?
Which gas is not released when fossil fuels are burnt?
The frequency of alternating electric current produced in India is
Tincture iodine solution is prepared in
Which of the following is the main component of biogas?
The correct food chain is
Waste can be managed by which of the following?
The action of an electric motor is based on
Which disease may primarily be caused in humans by ultraviolet (UV) rays of the Sun?
Which quantity is electric potential?
The substances which get decomposed by biological process are
At what stage of foetus does safe abortion occur?
Which of the following is an artificial ecosystem?
Which substance cannot be decomposed in the environment?
The hormone that controls the symptoms of puberty in adolescents is
Differentiate between metals and non-metals on the basis of physical and chemical properties.
What is called absolute refractive index ?

The changes that occur during adolescence are called
 

Explain recycling of waste materials with examples.
What are the harmful effects of aerosol chemicals ?
Write the names of four organelles of a cell.