Chapter 1 – Matter in Our Surrounding – Ankit Enterprises

The mass per unit volume of a substance is:

(a) acceleration
(b) density
(c) velocity
(d) weight

The melting point of ice is:

(a) 273.16 K
(b) 723.16 K
(c) 263.16 K
(d) 373 K

What is dry ice?

(a) Solid carbon dioxide
(b) Nitrogen oxide
(c) Carbon mono oxide
(d) None of them

Which of the following state is responsible for the glow in the sun and stars?

(a) Solid
(b) Liquid
(c) Plasma
(d) Gas

Which of the following phenomenon takes place when we add a drop of Dettol into the water?

(a) osmosis
(b) diffusion
(c) sublimation
(d) none of them

During summer, water kept in an earthen pot becomes cool because of the phenomenon of:

(a) diffusion
(b) transpiration
(c) osmosis
(d) evaporation

Which condition out of the following will increase the evaporation of water?

(a) Increase in temperature of the water
(b) Decrease in temperature of the water
(c) Less exposed surface area of water
(d) Adding common salt to the water

What is that process known as in which a solid is converted directly into the gaseous state without coming to a liquid state?

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

(a) (i) and (iii)
(b) (i) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)

When a gas jar full of air is placed upside down on a gas jar full of bromine vapours, the red-brown vapours of bromine from the lower jar go upward into the jar containing air. In this experiment:

(a) Air is heavier than bromine
(b) Both air and bromine have the same density
(c) Bromine is heavier than air
(d) Bromine cannot be heavier than air because it is going upwards against gravity

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

(a) Krypton
(b) Kerosene
(c) Carbon steel
(d) Carbon dioxide

Which one of the following statements is not true?

(a) The molecules in a solid vibrate about a fixed position
(b) The molecules in a liquid are arranged in a regular pattern
(c) The molecules in a gas exert negligibly small forces on each other, except during collisions
(d) The molecules of a gas occupy all the space available

The correct procedure of heating iron-sulphur mixture to prepare iron sulphide is: :

(a) Heat the powder mixture at the base of the test tube using a blue flame throughout.
(b) Heat the iron filings and sulphur mixture in the middle of the test tube using yellow flame throughout.
(c) Heat the powder mixture at the top of the test tube using an orange flame throughout.
(d) Heat the iron filings-sulphur mixture at 3/4 quarters of the test tube using a red flame throughout.

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

(a) Absorbs some heat
(b) Releases some heat
(c) Neither absorbs nor releases heat
(d) Absorbs exactly 3.34 x 105J/kg of heat

When heat is constantly supplied by a burner to boiling water, then the temperature of water during vaporisation :

(a) Rises very slowly
(b) Rises rapidly until steam is produced
(c) First rises and then becomes constant
(d) Does not rise at all

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

(a) Diffusion, evaporation, compression of gases
(b) Evaporation, compression of gases, solubility
(c) Evaporation, diffusion, expansion of gases
(d) 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:

(a) 33°C, 56°C and 118°C
(b) 35°C, 56°C and 119°C
(c) 35°C, 56°C and 118°C
(d) 56°, 119°C and 35° C

Four students took separately the mixture of sand, common salt and ammonium chloride in beakers, added water, stirred the mixture well and then filtered. They reported their observations as shown below

Student	As residue	In the filtrate
I	Ammonium chloride	Sand Common salt
II	Common salt, Sand	Ammonium chloride
III	Sand, Ammonium chloride	Common Salt
IV	Sand	Ammonium chloride, Common salt

Who reported the observations in the correct order of the components as residue and in the filtrate?

(a) I
(b) IV
(c) III
(d) II

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

(a) Condensation
(b) Evaporation
(c) Sublimation
(d) None of these

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

(a) Atom
(b) Water
(c) Humidity
(d) Electron

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

(a) Latent heat
(b) Lattice energy
(c) Loss of heat
(d) None of these

Which of the following statement is correct?

(a) Materials existing as liquids at room temperature have their melting and boiling points lower than that of room temperature.
(b) The phenomenon involving the transition of a substance from solid to liquid state is called sublimation.
(c) To convert a temperature on the Celsius scale to Kelvin scale, subtract 273 from the given temperature
(d) The density of ice is less than that of water.

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

(a) Particles of a matter are randomly moving in all directions.
(b) Kinetic energy of the particles increases with a rise in temperature
(c) Kinetic energy of the particles of all maters remains the same at a particular temperature.
(d) Particles of matter diffuse into each other on their own.

How many states of matter exist normally in nature?

What is that temperature called at which solid melts to become a liquid at the atmospheric pressure?

What is the state of matter which has maximum compressibility?

Fill in the blank

Early Indian philosophers classied matter into basic forms or elements.

Fill in the blank

The common unit of measuring volume is

Fill in the blank

With increase in temperature the kinetic energy of the particles

Fill in the blank

The rate of diusion of liquids is than that of solids.

Chapter 1 – Matter in Our Surrounding

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