Question

1. Which of the following conditions are observed when heat is supplied to the substance ?
a. Solid + Liquid, Liquid
b. Solid + Liquid, Liquid, Gas
c. Solid + Gas
d. Solid + Gas, Liquid, Gas​

Answer 1

Answer:

Solid+Liquid, Liquid, Gas is observed when heat is supplied to the substance.

Hope it helps you

Answer 2

Answer:

Let us start by describing the states of matter. In solids, the molecules are very close to each other. They have strong forces of attraction. As seen in the above example, the atoms in the solid lie neatly in planes in a definite orientation. Solids display high density, long-range structural order and characteristic rigidity with resistance to change in volume. They have comparatively good conductivity and heat conduction ability.

To convert a solid into a liquid you need to heat the solid beyond its melting point. The atoms absorb this heat and vibrate more and more. Hence, the atoms of solid move apart and ultimately it starts to flow. The melting point depends on the atmospheric pressure, the purity of the substance etc. This marks a change in the states of matter.