WorksheetsClass IX_Chapter 1
Total questions: 30
Worksheet time: 18mins
Which of the following phenomena would increase on raising the temperature?
Diffusion, evaporation, compression of gases
Evaporation, compression of gases, solubility
Evaporation, diffusion, expansion of gase
Evaporation, solubility, diffusion, compression of gases
Seema visited a Natural Gas Compressing unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions.
Low temperature, low pressure
High temperature, low pressure
Low temperature, high pressure
High temperature, high pressure
The property of flow is unique to fluids. Which one of the following statements is correct?
Only gases behave like fluids
Gases and solids behave like fluids
Gases and liquids behave like fluids
Only liquids are fluids
During summer, water kept in an earthen pot becomes cool because of the phenomenon of
diffusion
transpiration
osmosis
evaporation
A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?
Water, air, wind
Air, sugar, oil
Oxygen, water, sugar
Salt, juice, air
On converting 25°C, 38°C and 66°C to Kevlin 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
298 K, 310 K and 338 K
Choose the correct statement from the following:
Conversion of solid into vapour without passing through the liquid state is called vapourisation
Conversion of solid into vapour without passing through the liquid state is called sublimation
Conversion of vapour into solid without passing through the liquid state is called freezing
Conversion of solid into liquid is called sublimation
The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of the following correctly represents their boiling points in Kelvin scale?
306 K, 329 K and 391 K
308 K, 329 K and 392 K
308 K, 329 K and 391 K
329 K, 392 K and 308 K
Which condition out of the following will increase the evaporation of water?
Increase in temperature of water
Decrease in temperature of water
Less exposed surface area of water
Adding common salt to water
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)
The boiling point of water at sea level is
0°C
273 K
373 K
273°C
Which of the following has the strongest interparticle forces at room temperature?
Oxygen
Water
Bromine
Iron
Which of the following conditions is most favourable for converting a gas into a liquid?
High pressure, low temperature
Low pressure, low temperature
Low pressure, high temperature
High pressure, high temperature
Dry ice is
water in solid state
water in gaseous state
CO2 in liquid state
CO2 in solid state
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
When water at 0°C freezes to form ice at the same temperature of 0°C, then it:
Absorbs some heat
Releases some heat
Neither absorbs nor releases heat
Absorbs exactly 3.34 x 105 J/kg of heat
When heat is constantly supplied by a burner to boiling water, then the temperature of water during vaporisation:
Rises very slowly
Rises rapidly until steam is produced
First rises and then becomes constant
Does not rise at all
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?
Latent heat
Lattice energy
Loss of heat
None of these
Evaporation of a liquid at room temperature leads to a (a) effect.
At room temperature the forces of attraction between the particles of solid substances are (a) than those which exist in the gaseous state.
The arrangement of particles is less ordered in the ................. state. However, there is no order in the ................. state.
(a)
........................... is the change of gaseous state directly to solid state without going through the ................. state.
(a)
The phenomenon of change of a liquid into the gaseous state at any temperature below its boiling point is called (a)
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.
Particles of matter diffuse into each other on their own
Bose-Einstein Condensate have
Very low kinetic energy
Low kinetic energy
High kinetic energy
Potential energy
Which of the following is incorrect about plasma?
Fluorescent tube and neon sign bulbs consist of plasma
The gas gets ionised when electrical energy flows through it
It consists of super-energetic and super-excited particles.
The plasma glows with colour which does not depend upon nature of gas.
Which of the following does not affect rate of evaporation?
Wind speed
Surface area
Temperature
Insoluble heavy impurities
Kinetic energy of molecules is directly proportional to
Temperature
Pressure
Both (a) and (b)
Atmospheric pressure
