Science MCQs for Class 9 with Answers Chapter 1 Matter in Our Surroundings


Check the below NCERT MCQ Questions for Class 9 Science with Answers Pdf free download. MCQ Questions for Class 9 Science with Answers were prepared based on thelatest exam pattern. We have provided Class 9 Science MCQs Questions with Answers to help students understand the concept very well.


Q.1 What is dry ice?

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

(a) Solid carbon dioxide


Q.2 Which of the following state is responsible for the glow in the sun and stars?

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

(c) Plasma


Q.3 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

(b) diffusion


Q.4 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

(b) Kerosene


Q.5 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

(b) The molecules in a liquid are arranged in a regular pattern


Q.6 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.

(a) Heat the powder mixture at the base of the test tube using a blue flame throughout.


Q.7 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

(d) Does not rise at all


Q.8 The boiling point of water at sea level is

(a) 0°C
(b) 273 K
(c) 373 K
(d) 273°C

(c) 373 K


Q.9 Which of the following has the strongest interparticle forces at room temperature?

(a) Oxygen
(b) Water
(c) Bromine
(d) Iron

(d) Iron


Q.10 Which of the following conditions is most favourable for converting a gas into a liquid?

(a) High pressure, low temperature
(b) Low pressure, low temperature
(c) Low pressure, high temperature
(d) High pressure, high temperature

(a) High pressure, low temperature


Q.11 The mass per unit volume of a substance is:

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

(b) density


Q.12 The melting point of ice is:

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

(a) 273.16 K


Q.13 The property of flow is unique to fluids. Which one of the following statements is correct?

(a) Only gases behave like fluids
(b) Gases and solids behave like fluids
(c) Gases and liquids behave like fluids
(d) Only liquids are fluids

(c) Gases and liquids behave like fluids


Q.14 During summer, water kept in an earthen pot becomes cool because of the phenomenon of

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

(d) evaporation


Q.15 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?

(a) Water, air, wind
(b) Air, sugar, oil
(c) Oxygen, water, sugar
(d) Salt, juice, air

(c) Oxygen, water, sugar


Q.16 On converting 25°C, 38°C and 66°C to Kevlin scale, the correct sequence of temperature will be

(a) 298 K, 311 K and 339 K
(b) 298 K, 300 K and 338 K
(c) 273 K, 278 K and 543 K
(d) 298 K, 310 K and 338 K

(a) 298 K, 311 K and 339 K


Q.17 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

(c) Bromine is heavier than air


Q.18 Which of the following 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

(c) Evaporation, diffusion, expansion of gases


Q.19 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.

(a) Low temperature, low pressure
(b) High temperature, low pressure
(c) Low temperature, high pressure
(d) High temperature, high pressure

(c) Low temperature, high pressure


Q.20 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

(d) The density of ice is less than that of water


Q.21 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.

(c) Kinetic energy of the particles of all maters remains the same at a particular temperature.


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