Matter in Our Surroundings - 1
Matter in Our Surroundings - 1
Questions
Modern day scientists classified matter on the basis of its physical properties and chemical properties. Which of the following is/are not a physical property?
a. Solids
b. Liquids
c. Mixtures
d. Gases
- Both a and b
- Only b
- Both b and d
- Only c
- Only d
When a drop of ink is put into a beaker of water, then the colour of ink spreads into the whole water of the beaker. The phenomenon responsible for this is called
- diffusion
- fermentation
- condensation
- sublimation
- evaporation
Which of the following statements is/are false?
a. The Brownian motion can be observed in gases.
b. Due to fluidity, liquids and gases change their shapes readily.
c. The movement of different particles among each other on their own, so that they get mixed uniformly is called condensation.
- Only a
- Both a and b
- Only b
- Both b and c
- Only c
Which of the following statements is/are false?
a. The force of attraction is minimum in the particles of solid matter and maximum in the particles of gaseous matter.
b. The pressure exerted by the gas on the walls of its container is due to the collision of the fast moving gas particles against the walls of the container.
c. A sponge is considered to be a solid because its compressibility is due to the presence of minute pores in it, which are filled with air.
- Only a
- Both a and b
- Only b
- Both b and c
- Only c
A few substances change their shape when subjected to outside force. Which of the following change(s) their shape readily when subjected to outside force?
a. Iron
b. Water
c. Hydrogen
- Only a
- Both a and b
- Only b
- Both b and c
- Both a and c
The zig-zag movement of the small particles suspended in the liquid or gas is called Brownian motion. Which of the following is not a conclusion provided by the Brownian motion?
a. The matter is made up of tiny particles.
b. The particles of matter are constantly moving.
c. The particles of matter repel each other.
- Only a
- Both a and b
- Only b
- Both b and c
- Only c
Which of the following is not a condition that will determine the physical state of matter?
a. The space between the particles.
b. The kinetic energy of particles.
c. The force of repulsion between the particles.
- Only a
- Both a and b
- Only b
- Both b and c
- Only c
Water, milk, kerosene, etc. are liquids having various characteristics. Which of the following is not a characteristic of liquids?
- Liquids cannot be compressed much.
- Liquids have moderate to high densities.
- Liquids have a fixed volume and fixed shape.
- Liquids generally flow easily.
- Liquids do not fill their container completely.
Which of the following statements is/are false?
a. Diffusion occurs in solids, liquids and gases.
b. Diffusion is fastest in solids and slowest in gases.
c. The phenomenon of diffusion tells us that the particles of matter are constantly moving.
- Only a
- Both a and b
- Only b
- Both b and c
- Only c
According to the properties of matter, which of the following substances does not have a fixed shape, but takes the shape of its container?
a. Nitrogen
b. Groundnut oil
c. Coal
- Only a
- Both a and b
- Only b
- Both b and c
- Only c
According to the properties of substances, which of the following substances will have minimum distance between its particles?
- Iron
- Argon
- Milk
- Helium
- Alcohol
If heat is constantly supplied to melt the ice, the temperature of the ice during melting
- first increases and then decreases
- first remains constant and then increases
- decreases very slowly
- increases very slowly
- will not increase at all
Diffusion in liquids is slower than in gases because
- the liquids do not have free spaces at all
- the particles in gases move slowly as compared to the particles in liquids
- the particles in gases do not diffuse at all
- the particles in liquids move slowly as compared to the particles in gases
- None of these
The laboratory thermometers that are used for performing science experiments are all calibrated in
- joules
- degree Celsius
- Newtons
- watts
- pascals
The temperature at which water boils and changes into vapours at atmospheric pressure is called the boiling point of water liquid. The boiling point of water on the kelvin scale is
- 373 K
- 243 K
- 145 K
- 273 K
- 385 K
A substance can exist as a solid, a liquid or a gas, depending on the pressure and temperature. Which of the following is that substance?
- Milk
- Iron
- Coal
- Water
- Oxygen
The latent heat of vapourisation is the quantity of heat required to convert 1 kg of liquid to vapour without any change in temperature. What is the latent heat of vapourisation of water?
- 0.225 x 105 J/Kg
- 2.25 x 104 J/Kg
- 3.34 x 105 J/Kg
- 33.4 x 105 J/Kg
- 22.5 x 105 J/Kg
Which of the following statement is/are false?
a. The latent heat has to be always supplied to change the state of the matter.
b. Higher the melting point of a solid substance, lesser will be the force of attraction between its particles.
c. The heat required to convert a liquid into the vapour state is called latent heat of vapourisation.
- Only a
- Both a and b
- Only b
- Both b and c
- Only c
Sublimation is a rare process and occurs only in a few substances. In which of the following substances does sublimation occur?
- Water
- Iodine
- Oxygen
- Vinegar
- Common salt
Which of the following statements is/are false?
a. Naphthalene balls disappear with time without leaving any residue because they undergo sublimation.
b. Ammonia gas can be liquified by applying high pressure and lowering the temperature.
c. Dry ice sublimes to form carbon monoxide gas.
- Only a
- Both a and b
- Only b
- Both b and c
- Only c
A desert cooler cools better on a hot and dry day because the higher temperature on a hot day
- increases the diffusion of water
- decreases the humidity of air
- increases the humidity of air
- increases the rate of evaporation of water
- decreases the rate of evaporation of water
Water vapour is given out by the plants by the process of
- transpiration
- condensation
- sublimation
- diffusion
- None of these
The sun and other stars glow due to the presence of _________ in them.
- solids
- liquids
- gases
- plasma
- Bose-Einstein condensate
Match the following:
| Name of liquid | Boiling point |
| a. Alcohol | 1. 100 degree Celcius |
| b. Water | 2. 357 degree Celcius |
| c. Mercury | 3. 78 degree Celsius |
- a - 3, b - 1, c - 2
- a - 3, b - 2, c - 1
- a - 1, b - 2, c - 3
- a - 1, b - 3, c - 2
- a - 2, b - 1, c - 3
Which of the following statements is/are false?
a. Water vapour comes into the air from the evaporation of water present in ponds, lakes, rivers and oceans.
b. All the water on the earth does not get evaporated due to the high value of latent heat of vaporisation of water.
c. On increasing the pressure on solid carbon dioxide, it gets converted directly into carbon dioxide gas.
- Only a
- Both a and b
- Only b
- Both b and c
- Only c
Match the following:
| a. Evaporation | 1. This is the process in which a liquid changes into vapour form even below its boiling point. |
| b. Sublimation | 2. This is the process of changing of a gas to a liquid form by cooling. |
| c. Condensation | 3. This is the process in which a solid changes directly into vapours on heating and vice versa. |
- a - 1. b - 3, c - 2
- a - 1. b - 2, c - 3
- a - 3. b - 2, c - 1
- a - 3. b - 1, c - 2
- a - 2. b - 3, c - 1