Coal is a widely used energy resource. Which of the following energies is stored in coal?
Heat energy
Chemical energy
Light energy
Sound energy
Coal has chemical energy stored in its chemical bonds. When coal is burnt, this energy is released in the form of heat and light.
Which energy resource was first used in street lighting?
Statement I:- While burning firewood a large amount of heat and light energy is generated.
Statement II:- Chemical energy stored in plants converts to heat and light energy on burning.
Which of the following types of energy can be used to decompose water into its elements ? (a) heat energy (b) light energy (c) chemical energy (d) electrical energy