MATTER IN OUR SURROUNDINGS

In which of the following conditions, the distance between the molecules of hydrogen gas would increase?

(i) Increasing pressure on hydrogen contained in a closed container

(ii) Some hydrogen gas leaking out of the container

(iii) Increasing the volume of the container of hydrogen gas

(iv) Adding more hydrogen gas to the container without increasing the volume of the container

• (i) and (iii)

• (i) and (iv)

• (ii) and (iii)

• (ii) and (iv)

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

When water at 0°C freezes to form ice at the same temperature of 0°C, then it:

• Absorbs some heat

• Neither absorbs nor releases heat

• Absorbs exactly 3.34 x 10⁵J/kg of heat

• Releases some heat

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

• Diffusion, evaporation, compression of gases

• Evaporation, diffusion, expansion of gases

• Evaporation, compression of gases, solubility

• Evaporation, solubility, diffusion, compression of gases

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

• 35°C, 56°C and 118°C

• 33°C, 56°C and 118°C

• 35°C, 56°C and 119°C

• 56°, 119°C and 35° C

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

• Condensation

• Evaporation

• Sublimation

• None of these

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

• Atom

• Water

• Humidity

• Electron

On converting 25°C, 38°C and 66°C to kelvin scale, the correct sequence of temperature will be

• 298 K, 311 K and 339 K

• 298 K, 300 K and 338 K

• 273 K, 278 K and 543 K

• none of these

CO2 can be easily liquified and even solidified because

• It has weak forces of attraction

• It has more inter molecular space

• It has comparatively more force of attraction than other gases

• It is present in atmosphere.

Bose-Einstein Condensate have

• Low kinetic energy

• High kinetic energy.

• Highest kinetic energy.

• Very low kinetic energy