Contents
MCQ QUESTION CLASS-9 CHEMISTRY CHAPTER 1
Question- 1- According to early Indian philosopher, matter is made up of air, earth
(a) – fire
(b) – sky
(c) – water
(d) – all of the above
Answer – (c) – water
Question – 2 – Solid have:
(a) – definite volume and definite shape
(b) – definite volume and no definite shape
(c) – no definite volume and no definite shape
(d) – none of the above
Answer – (c) – no definite volume and no definite shape
Question – 3 – Gases are :
(a) – not compressible
(b) – slightly compressible
(c) – highly compressible
(d) – not certain
Answer – (c) – highly compressible
Question – 4 – Inter molecular space is maximum in :
(a) – solids
(b) – liquids
(c) – gases
(d) – all of these
Answer – (d) – all of these
Question – 5 – Fluids are :
(a) – solids and liquids
(b) – liquids and gases
(c) – gases and solids
(d) – all of these
Answer – (c) – gases and solids
Question – 6 – Particles of matter :
(a) – have forces of attraction between them
(b) – are very – very tiny and move continuously
(c) – have space between them
(d) – all of these
Answer – (a) – have forces of attraction between them
Question – 7 – Changing of a solid into liquid is called
(a) – sublimation
(b) – vaporization
(c)- condensation
(d) – fusion
Answer – (b) – vaporization
Question – 8 – Changing of a liquid to solid state, is called :
(a) – sublimation
(b) – vaporization
(c) – condensation
(d) – fusion
Answer – (c) – condensation
Question – 9 – The example of sublime substance is :
(a) – naphthalene
(b) – ammonium chloride
(c) – acetone
(d) – all of these
Answer – (a) – naphthalene
Question – 10 – Dry ice is:
MCQ QUESTION CLASS-9 CHEMISTRY CHAPTER 1
(a) – ice without water
(b) – ice high temperature
(c) – solid carbon monoxide
(d) – ice is solid
Answer – (c) solid carbon dioxide
Question – 11 – Ice of 0°c causes more cooling effect than water of same temperature
(a) – Kinetic energy of ice is higher than water
(b) – ice takes latent heat of fusion
(c) – ice is solid
(d) – both will produce same cooling effect
Answer – (b) – ice takes latent heat of fusion
Question – 12 – In melting process of a solid :
(a) – temperature increases slowly
(b) – temperature decrease slowly
(c) – temperature remains constant
(d) – first decrease then increases
Answer – (c) – temperature remains constant
Question -= 13 – Intermolecular force is minimum in
(a) – solids
(b) – liquids
(c) – gases
(d) – none of these
Answer – (c) – gases
Question – 14 – The condition that will increase the rate of evaporation of water is :
(a) – adding common salt to the water
(b) – increasing the temperature of water
(c) – decreasing the temperature of water
(d) – decreasing the exposed surface area of water
Answer – (b) – increasing the temperature of water
Question – 15 – A few substances are arranged in the increasing order of forces of attraction between their particles. Which one of the following represents the correct sequence of arrangement ?
( a) – air, water, common salt
(b) – common salt, water, air
(c) – common salt, air, water
(d) – water, air, common salt
Answer – (a) – air, water, common salt
Question 16 – Fluids have the unique property to flow. The correct statement is :
(a) – only gases behave like fluids
(b) – liquids and solids behave like fluids
(c) – gases and liquids behave like fluids
(d) – only liquids behave like fluids
Answer – (c) – gases and liquids behave like fluids
Question – 17 – In which of the following, the distance between gas molecules will increase ?
(a) – some gas is leaked out of the container without changing the volume of container
(b) – some gas is added to the container without changing its volume
(c) – increasing pressure on the gas contained in a closed vessel
(d) – increasing the volume of the container
Answer – (c) – increasing pressure on the gas contained in a closed vessel
Question – 18 – while determining the boiling point of water, the teacher suggested to add some pumice stone pieces to the hard glass test tube containing water. Thos was done to :
(a) – avoid bumping
(b) – avoid melting of hard glass test tube
(c) – prevent unnecessary loss of heat energy
(d) – none of the above
Answer – (a) – avoid bumping
Question – 19 – Liquids have:
(a) – definite volume and definite shape
(b) – definite volume and no definite shape
(c) – no definite volume and no definite
(d) – none of the above
Answer – (b) – definite volume and no definite shape
Question – 20 – gases have:
MCQ QUESTION CLASS-9 CHEMISTRY CHAPTER 1
(a) – definite volume and definite shape
(b) – definite volume and no definite shape
(c) – no definite volume and no definite shape
(d) – none of the above
Answer – (c) – no definite volume and definite shape
Question – 21 – Boling point of a substance is below the room temperature, at room temperature, it
(a) – solid
(b) – liquid
(c) – gas
(d) – all of these
Answer – (c) – gas
Question – 22 – Inter- molecular space is minimum in:
(a) – solids
(b) – liquids
(c) – gases
(d) – all of these
Answer – (a) – solids
Question – 23 – Which is not a matter
(a) – sugar
(b) – bread
(c) – cold
(d) – LPG
Answer – (c) – cold
Question – 24 – The boiling point of water is :
(a) – 273 k
(b) – 100 k
(c) – 0°c
(d) – 373 k
Answer – 373 k
Question – 25 – Changing liquid to gaseous state is called :
(a) – sublimation
(b) – vaporization
(c) – condensation
(d) – fusion
Answer – (b) vaporization
Question – 26 – Changing of solids into gaseous state vice versa is called:
(a) – sublimation
(b) – vaporization
(c) – condensation
(d) – fusion
Answer – (a) sublimation
Question – 27 – Evaporation is the process of a liquid changing into vapor
(a) – at its boiling point
(b) – below the boiling the point
(c) – at 273 k
(d) – at 373 k
Answer – (b) – below the boiling the point
Question – 28 – For liquefaction 0f air or gas:
(a) – temperature should be low and high pressure
(b) – temperature should be high and low pressure
(c) – temperature and pressure both should be high
(d) – temperature and pressure both should be low
Answer – (a) – temperature should be low and high pressure
Question – 29 – Room temperature (25°c) will be equal to :
(a) – 248 k
(b) -298 k
(c) – 343 k
(d) – 398 k
Answer – (b) – 298 k
Question – 30 – Rate of evaporation will be decreased if:
(a) – surface area in increased
(b) – temperature is increased
(c) – humidity in increased
(d) – increase in wind speed
MCQ QUESTION CLASS-9 CHEMISTRY CHAPTER 1
Answer – (c) – humidity in increased
Question – 31 – The boiling points 0f three liquids A, B and C are 47°c and 127°c respectively. in Kelvin scale the correct sequence of temperature will be:
(a) – 310k, 343k,400k
(b) – 320k,343k, 410k
(c) – 320k,343k,400k
(d) – 310k,333k,400k
Answer – (c) – 320k, 343k,400k
Question -32 – Four student A, B,C and D visited a natural gas compressing unit and observed the specific condition of temperature and pressure of the liquefication of natural gas. They told the following statements about the conditions required for the liquefication of gas. Which statement is correct ?
(a) – temperature and pressure should be low
(b) – temperature and pressure should be high
(c) – temperature should be high and pressure should be low
(d) – temperature should be low and pressure should be high
Answer – (d) – temperature should be low and pressure should be high
Question – 33 – In villages people use to keep water in earthen pots during summer and water becomes cool due to:
(a) – osmosis
(b) – evaporation
(c) – freezing
(d) – diffusion
Answer – (b)- evaporation
Question – 34 – Which one of the following sets of phenomena will increase on increasing temperature:
(a) – expansion of gases, diffusion, evaporation
(b) – evaporation, solubility, compression of gases
(c) – compression of gases, solubility, diffusion, evaporation
(d) – diffusion, solubility, evaporation, compression of gases
Answer – (a) – expansion of gases, diffusion, evaporation
Question – 35 – A student takes same water in a beaker and heat it over a flame for determining its boiling point. He keeps on taking its temperature reading. He observes that the temperature of the water :
(a) – keeps on increasing regularly
(b) – keeps on increasing irregularly
(c) – first increase slowly, then decreases rapidly and eventually becomes constant
(d) – first increases gradually and then become constant
Answer – (d) – first increases gradually and then become constant
Question – 36 – For determining the melting point of ice, the thermometer should be kept
(a) – with its bulb in the ice cubes
(b) – in contact with the inner wall of the beaker
(c) – a little above the ice cubes
(d) – in touch with the beaker from outside
Answer – (a) – with its bulb in the ice cubes
MCQ QUESTION CLASS-9 CHEMISTRY CHAPTER 1
WRITTEN BY – SHEELU YADAV & POOOJA SHARMA
TYPIST BY – SHIVAM TIWARI & ANSHUMAN SHARMA
