Category: Class 9 Science

NCERT Solutions for Class 9 Science for CBSE exams 2020-2021.

Discussion Forum Latest Questions

Kaveri Jha

The correct answer is (c) Gases and liquids behave like fluids. Fluids are substances that can flow and take the shape of their container. Both gases and liquids exhibit this property because their molecules can move freely, unlike solids, which ...

Kaveri Jha

The correct answer is (d) evaporation. During summer, water in an earthen pot becomes cool due to evaporation. The porous walls allow water to seep out and evaporate, absorbing heat from the stored water, thus lowering its temperature and keeping ...

Kaveri Jha

The correct answer is (d) All of these. Iodine, camphor, and naphthalene all undergo sublimation, meaning they directly change from solid to gas without becoming liquid. This process occurs due to weak intermolecular forces, allowing these substances to vaporize upon ...

Kaveri Jha

The correct answer is (b) Solid < Liquid < Gas. In solids, particles are tightly packed with minimal space between them. In liquids, particles have more space and can move freely. In gases, particles are far apart, allowing them to ...