Class-9 Chemistry Ch-1 Matter in our surroundings

A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is__

• Krypton

• Kerosene

• Carbon steel

• Carbon dioxide

Which one of the following statements is not true?

• The molecules in a solid vibrate about a fixed position.

• The molecules in a liquid are arranged in a regular pattern.

• The molecules in a gas exert negligibly small forces on each other, except during collisions.

• The molecules of a gas occupy all the space available.

Which one of the following set of phenomena would increase on raising the temperature?

• Diffusion, evaporation, compression of gases

• Evaporation, compression of gases, solubility

• Evaporation, diffusion, expansion of gases

• Evaporation, solubility, diffusion, compression of gases

229 K = ___°C ?

• -54

• -44

• 44

• 34

68 °C = ____ K?

• 241

• 441

• 341

• - 241

On converting 308 K, 329 K and 391 K to Celsius scale, the correct sequence of temperatures will be:

• 33°C, 56°C and 118°C

• 35°C, 56°C and 119°C

• 35°C, 56°C and 118°C

• 56°, 119°C and 35° C

Which of the following phenomena always results in the cooling effect?

• Condensation

• Evaporation

• Sublimation

• All of above

Which of the following cannot be considered a form of matter?

• Atom

• Water

• Humidity

• Electron

Which of the following causes the temperature of a substance to remain constant while it is undergoing a change in its state?

• Loss of heat

• Latent heat

• Lattice heat

• Enthalpy

Which of the following statement is not true regarding the characteristic of matter?

• Particles of a matter are randomly moving in all directions.

• Kinetic energy of the particles increases with a rise in temperature.

• Kinetic energy of the particles of all maters remains the same at a particular temperature.

• Kinetic energy of the particles of all maters remains the same at a particular temperature.