Matter in our surroundings - class-IX
Description: matter in our surroundings | |
Number of Questions: 108 | |
Created by: Naresh Verma | |
Tags: the particle theory let us know the substances matter in our surroundings chemistry matter around us |
The common unit of measuring volume is _________.
The one characteristic which is similar for solids and liquids and not gases is:
A distinctive property of the liquid state is____________.
The top of liquids have a flat surface because _____________.
Liquids are usually difficult to_____________.
The rate of diffusion of liquids is __________.
________ can usually be reduced by heating the liquid.
Which of the following element are liquid, at standard conditions for temperature and pressure?
Volatile liquids have ___________.
Liquid and solid are both termed as ________ , while liquid and gases are termed as ___________ .
Liquids tend to have better _________ than gases.
The limited amount of space between particles means that liquids have _________.
Which of the following are the characterstics of a liquid?
The property of liquids to resist their flow is called _______.
What are the characteristics of a liquid?
Liquids have a definite volume but an indefinite shape.
Liquids occupy the entire volume of the container in which they are placed.
The state of matter which has no fixed shape but volume and can freely flow is:
The rate of diffusion is higher in liquids than solids because of _____________.
Which of the following statements is incorrect?
In an ionic solid, ${B}^{x-}$ ions constitute a ccp lattice, if ${A}^{y+}$ ion occupy $25$% of the tetrahedral voids, the possible ions in the solid are:
Which of the following is not the state of matter?
Among the three states of matter which has highly fluid nature?
Compressibility is minimum in case of :
Which of the following states of matter have highest force of attraction between particles?
Which of the following states of matter exerts pressure on the walls of the container?
On absorption of heat, the temperature:
The miscibility property is maximum in which states of matter?
Liquids and gases ....................... on heating.
Which of the following is a type of latent heat?
................... reflects all heat, .................... absorbs all heat.
Which of the following is a good conductor of heat?
Which of these is a property of a solid.
Which of these is a property of a gas.
Look at the classification table below. Which of the following sets of headings is correct?
I | II | III |
---|---|---|
Oil | Snow | Wind |
Paint | Crayon | Oxygen |
Mechanical work is specially important in systems that contains :
Which is not a property of solids
The kinetic theory considers all matter ( substances) to be made up of particles which are in continuous motion.
When a substance is heated kinetic energy of particles decreases.
When heat is applied, energy is absorbed and the particles start vibrating more vigorously.
Molecules in solids:
In liquid and solid states the bond lengths and bond angles are slightly changed.
Which produces more burn, steam or boiling water?
The chemical reaction between quicklime and water is characterised by:
Which states of matter has no miscibility?
State having indefinite shape but definite volume is:
Diffusion is negligible in case of:
Arrange the following in order of increasing kinetic energy of their particles.
Which of the following states of matter has most number of particles per unit area?
The process that absorbs latent heat is:
The more light the object absorbs, the:
Which color absorbs the most heat?
_______ causes heat transfer.
Heat energy is transferred from hot places to cooler places by:
The process in which gas transform into solid is called :
Combustion reaction is usually .................. whereas decomposition reaction is ................ usually.
Which of the following statement is true?
Which of these is a property of a liquid?
Which of the following sentences are true?
On heating solids, the intermolecular attraction:
On heating liquids, the intermolecular space between molecules:
On heating solids, the intermolecular space between molecules:
Change of solid state into liquid state is known as _____________.
The temperature at which particles slow down and convert into a solid is known as:
On heating a liquid, heat absorbed by its molecules is absorbed and stored in the form of:
The solid state formed from gaseous state on cooling is called:
On heating liquids, the intermolecular attraction:
What happens to a gas in condensation?
At which temperature, the particles of liquid get converted into a gas?
On cooling gases and liquids, temperature _______, intermolecular attraction ________, and intermolecular space between molecules __________.
The temperature at which the particles slow down and converts into a liquid is known as:
On heating matter, the particles ...... energy and on cooling matter, the particles .......energy.
At which temperature, the particles get converted into a liquid?
On cooling a gas, potential energy stored is released in the form of:
The phenomenon of change from one state of matter to another and then back to the original state is called ___________.
Inter-conversion of states of matter is affected by:
Which of the following has the highest kinetic energy?
At the freezing point, particles slow down, come close and get converted into a _______.
What is sublimation?
The ordered arrangement of solid breaks when:
Which of the following statements is false for inter-conversion of matter based on kinetic theory of gases, when a gas/liquid is cooled?
At the boiling point, particles become completely free and convert into _______.
Gas $\rightarrow$ Solid conversion is known as:
Gas $\rightarrow$ Liquid conversion is known as:
At the melting point, the solid and liquid phase exist in:
Evaporation occurs .................... the boiling point.
During melting, the temperature:
Solid $\rightarrow$ Gas conversion is known as:
Matter undergoes a change. The changes are of two types : Physical and chemical change. A physical change is a change that involves only a change in the physical state of matter.
Its chemical properties remain the same. Usually increasing the temperature of applying pressure or both brings about a physical change. On reversing the condition, i.e., reducing the temperature or reducing the pressure or both, the original state of matter is restored. In other words, physical changes are reversible. A chemical change is a change that involves a change in the chemical composition of matter. A new substance is formed. In a chemical change, the chemical and physical properties of the substance is formed. In a chemical change, the chemical and physical properties of the substance formed will be different from the original substance. When zinc carbonate is heated and cooled, the change(s) that are observed are :
The translational kinetic energy of $10^{20}$ molecules of nitrogen at a certain temperature is $0.63$ J. The temperature is:
The translational kinetic energy of N molecules of $O _2$ is x J at $-123^o$C. Another sample of $O _2$ at $27^o$C has translational kinetic energy of $2x$ J. The latter sample contains:
The helium atom is two times heavier than a hydrogen molecule. At $298$ K, the average kinetic energy of a helium atom is:
Consider three identical flasks with different gases:
Flask A: CO at $760$ torr and $273$ K
Flask B: $N _2$ at $250$ torr and $273$ K
Flask C: $H _2$ at $100$ torr and $273$ K
In which flask will the molecules have the greatest average kinetic energy per mole?
At what temperature will the total translational kinetic energy of $0.30$ mole of He gas be the same as the total translational kinetic energy of $0.40$ mol of Ar at $400$ K?
Steam at ${100^0 C}$ causes more severe burns than the water at the same temperature because:
A solid consists of low kinetic energy, vibrating particles locked into position by interparticle attractive forces. When heat is applied, energy is absorbed and the particles start vibrating more vigorously.
Why does evaporating sweat cools human body?
The motion of particles is _____ during freezing.
Elastic collisions transfer:
According to kinetic theory of gases, molecular kinetic energy increases when:
In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
Which of the following generalizations cannot be made about the phase change of a pure substance from solid to liquid?
$\displaystyle Gas\rightarrow Solid$
Statement I: Water droplets form on the outside of a beaker containing an ice bath.
Statement II: Water vapor molecules in the air lose energy when they collide with the cold glass surface and condense.
An electron having mass '$m$' and kinetic energy $E$ enter in the uniform magnetic field $B$ perpendicularly, then its frequency will be:
A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 kV, its kinetic energy will be :
As the water heats up from 280 K to 310 K, the average kinetic energy of its molecules will:
Which of the following is a physical change?