Who is telling the truth?(i) Objects contract on heating.(ii) Atoms

1.	Who is telling the truth?(i) Objects contract on heating.(ii) Atoms of a solid are free.(iii) The average kinetic energy of atoms in a hot object is less than the average kinetic energy of atoms in a cold object.
Answer» (i) False. (In general, objects expand on heating. There are some exceptions to this, you will learn about them in Standard X.) (ii) False. (Atoms of a solid are bound to each other due to the forces acting between them.) (iii) False. (The average kinetic energy of atoms in a hot object is more than the average kinetic energy of atoms in a cold object.)

Who is telling the truth?(i) Objects contract on heating.(ii) Atoms of a solid are free.(iii) The average kinetic energy of atoms in a hot object is less than the average kinetic energy of atoms in a cold object.

Answer»

(i) False. (In general, objects expand on heating. There are some exceptions to this, you will learn about them in Standard X.)

(ii) False. (Atoms of a solid are bound to each other due to the forces acting between them.)

(iii) False. (The average kinetic energy of atoms in a hot object is more than the average kinetic energy of atoms in a cold object.)