CBSE Class 9 Science Is Matter Around us Pure MCQs Set A

Question. What is the name of the metal which exists in liquid state at room temperature?
(a) Sodium
(b) Potassium
(c) Mercury
(d) Bromine

Answer :   C

Question. Mixture of two or more metals , or metals and non-metals called as…………
(a) Alloy
(b) Solution
(c) Mixture
(d) Metallic mixture

Answer :   A

Question. Sol and gel are examples of
(a) Solid-solid colloids
(b) Sol is a solid-liquid colloid and gel is liquid solid colloid
(c) Sol is solid-solid colloid and gel is solid-liquid colloid
(d) Sol is a liquid-solid colloid and gel is a solid-liquid colloid

Answer :   B

Question. Which of the following elements is not a metalloid?
(a) Boron
(b) Silicon
(c) Germanium
(d) Tungsten

Answer :   D

Question. Centrifugation do not used in………..
(a) Diagnostic laboratories
(b) Separate butter and cream
(c) To separate water and sugar
(d) Used in washing machines

Answer :   C

Question. A pure substance which is made up of only one kind of atom and cannot be broken into two or more simpler substances by physical or chemical means is referred to as
(a) a compound
(b) an element
(c) a molecule
(d) a mixture

Answer :   B

Question. Which of the following methods would you use to separate cream from milk?
(a) Fractional distillation
(b) Distillation
(c) Centrifugation
(d) Filtration

Answer :   C

Question. How one can separate ammonium chloride from a mixture containing ammonium chloride and sodium chloride?
(a) Precipitation
(b) Sublimation
(c) Chromatography
(d) Cetrifugation

Answer :   B

Question. Separation of dyes and black ink using ……………………. Method.
(a) Dissolution
(b) Chromatographic
(c) Sublimation
(d) Suspension

Answer :   B

Question. If the amount of solute contained in the solution is less than the saturation level…it called as……………
(a) Saturated solution
(b) Unsaturated solution
(c) Homogenous solution
(d) Heterogeneous solutio

Answer :   B

Question. The component of solution that dissolved in solvent called……………
(a) Solute
(b) Sugar
(c) Solvent
(d) Mixture

Answer :   C

Question. If the solution is 400 ml and solvent is 300ml so what is percentage of solute?
(a) 30
(b) 40
(c) 45
(d) 25

Answer :   D

Question. Crystallization method is used to purify………..
(a) Liquid
(b) Gas
(c) Solid
(d) Miscible liquids

Answer :   C

Answer: A

Question: Air is regarded as a mixture because
(a) it pressure may vary
(b) its temperature may change
(c) its volume changes under different conditions
(d) its composition may vary

Answer: D

Question: Which of the following properties is different for solids, liquids and gases?
(a) movement of molecules
(b) particle size of the substance
(c) mass of the substance
(d) energy exchange

Answer: A

Question: Which of the following is an example of a mixture ?
(a) Sugar
(b) Brass
(c) CO₂
(d) NO₃

Answer: B

Question: Which of the following is not a chemical change ?
(a) rusting of iron
(b) converting water into steam
(c) making curd from milk
(d) heating coal

Answer: B

Question: A chemical equation is a means
(a) of representing chemical and physical properties of reactant molecules
(b) of acquiring instructions for the preparation of a compound
(c) or representing a chemical change by means of symbol and formulas
(d) of showing the kind of elements present in a mixture

Answer: C

Question: In a balanced chemical equation, the reactant side and the product side have the same number of
(a) atoms
(b) molecules
(c) ions
(d) electrons 

Answer: A 

Question: In the chemical equation,Mg + O2 –→ 2MgO, O2 represents
(a) atoms of oxygen joined together in a molecule
(b) molecules of oxygen
(c) grams of oxygen
(d) mole of oxygen

Answer: A

Question: The chemical formula of a compound does not represent
(a) the total number of atoms in one molecule of the compound
(b) the number of the molecules of the compound
(c) the state of the molecules of the compound
(d) the composition of a molecule of the compound

Answer: A

Question: Which of the following statements about a balanced chemical equation is true ?
(a) mass is conserved
(b) atoms are conserved
(c) mass as well as atoms are conserved
(d) molecules are conserved

Answer: C

Question: Boiling point of 10% aqueous solution of common salt at atmospheric pressure is
(a) 100°C
(b) > 100°C
(c) < 100°C
(d) not possible to predict

Answer: B

Question: The change of state of substance from gas to liquid is called-
(a) melting
(b) boiling
(c) condensation
(d) vaporization 

Answer: C

More Questions............................

Question: Area under a velocity-time graph gives
(a) distance travelled by a moving object
(b) acceleration of moving object
(c) retardation of a moving object
(d) time taken by a moving object

Answer: A

Question: If a body is thrown up with an initial velocity u and covers a maximum height of h, then h is equal to
(a) u2/2g
(b) u/2g
(c) 2u2g
(d) None of these

Answer: A

Question: A body is thrown vertically upwards and rises to a height of 10m. The velocity with which the body was thrown upwards is (g = 9.8 m/s2)
(a) 14 m/s
(b) 16 m/s
(c) 15 m/s
(d) 12 m/s

Answer: A

Question: A truck running along a straight line increases its speed uniformly from 30 m/s to 60 m/s over a time interval 1 min. The distance travelled during this time interval is
(a) 2700 m
(b) 900 m
(c) 1800 m
(d) 3600m

Answer: A

Question: car travels 1/3 rd distance on a straight road with a velocity of 10 km/hr, nextb1/3 rd with velocity 20 km/hr and the last 1/3 rd with velocity 60 km/hr. What is the average velocity of the car in the whole journey?
(a) 18 km/hr
(b) 6 km/hr
(c) 4 km/hr
(d) 12 km/hr

Answer: A

Question: Driver of a train travelling at 115 km/hr sees on a same track, 100m infront of him, a slow train travelling in the same direction at 25 km/ hr. The least retardation that must be applied to faster train to avoid a collision is
(a) 3.125 m/s2
(b) 2.75 m/s2
(c) 3.5 m/s2
(d) 3.0 m/s2

Answer: A

Question: Distance of the moon from the earth is 4 × 108 m. The time taken by a radar signalmn transmitted from the earth to reach the moon is
(a) 1.3 s
(b) 0.70 s
(c) 5.2 s
(d) 2.6 s

Answer: A

Question: A motor ship covers the distance of 300 km between two localities on a river in 10 hrs downstream and in 12 hrs upstream. Find the flow velocity of the river assuming that these velocities are constant.
(a) 2.5 km/hr
(b) 3.5 km/hr
(c) 2.0 km/hr
(d) 3 km/hr

Answer: A

Question: Quantum number value for 2p sub shell are
(a) n = 2, L = 0
(b) n = 2, L = 1
(c) n = 1, L = 0
(d) n = 1, L = 1

Answer : B

Question: Who discovered Neutrons?
(a) Dalton
(b) J J Thomson
(c) Chadwick
(d) Daraday

Answer : A

Question: Principle quantum number describes
(a) size of the orbital
(b) shape of the orbital
(c) spin of the orbital
(d) orientation of the orbital

Answer : A

Question: Who first proposed the atomic theory based on scientific knowledge
(a) John Dalton
(b) Robert Brown
(c) Jones Berzelius
(d) Dmitri Mendeleev

Answer : A

Question. A nuclear particle that has same mass that of a proton, but no electrical charge is
(a) nuclide
(b) electron
(c) proton
(d) isotope

Answer : B

Question: Experimentation with cathode ray led to the discovery of
(a) electron
(b) proton
(c) neutron
(d) nucleus

Answer : A

Question. In the gold foil experiment, most of the particles fired at the foil
(a) bounced back
(b) were absorbed by the foil
(c) passed through the foil
(d) combined at the foil

Answer : B

Question: Anode rays were discovered by
(a) Rutherford
(b) Goldstein
(c) J J Thomson
(d) J. Stoney

Answer : B 

Question: In the separation of dyes A and B by chromatography, component B has more solubility in the solvent: Which component will rise faster?
(a) B
(b) A
(c) Both at the same speed
(d) Separation of dyes is independent of the solubility in solvent

Answer: B 

Question: Which of the following is the correct set of apparatus for fractional distillation?
(a) Round bottomed flask, thermometer, fractionating column, water condenser and flask
(b) Round bottomed flask, thermometer, water condenser and beaker
(c) Round bottomed flask, thermometer, air condenser and beaker
(d) Round bottomed flask, thermometer, fractionating column, air condenser and flask

Answer: A

Question: The sequence of steps for separating a mixture of salt, sand and camphor is:
(a) Sublimation, adding water, filtration, evaporation
(b) Adding water, filtration, evaporation, sublimation
(c) Adding water, filtration, sublimation, evaporation
(d) Sublimation, adding water, evaporation, filtration

Answer: A 

Question: Which of the following represents a chemical change?
(a) Extraction of copper from copper pyrites
(b) Distillation of water
(c) Melting of wax
(d) Dissolution of salt in water

Answer: A

Question: Four samples A, B, C, D are prepared by adding a pinch of copper sulphate, a spatula of copper sulphate, a spatula of chalk powder, and some milk, to water respectively:
Which of these will exhibit the Tyndall effect?
(a) D
(b) A and D
(c) B and C
(d) A and B

Answer: D 

Question: Four samples A, B, C, D are prepared by adding a pinch of copper sulphate, a spatula of copper sulphate, a spatula of chalk powder, and some milk, to water respectively:
Which of these will form a clear and transparent solution: 
(a) A and B
(b) A
(c) B
(d) B and D

Answer: A and B 

Question: Four samples A, B, C, D are prepared by adding a pinch of copper sulphate, a spatula of copper sulphate, a spatula of chalk powder, and some milk, to water respectively:
Which one is the colloidal solution among them?
(a) D
(b) C
(c) B
(d) A

Answer: D 

Question: A mixture of oil and water can be separated by:
(a) Separating funnel
(b) Sublimation
(c) Crystallisation
(d) Chromatography

Answer: A

Question: When a bottle of soda water is opened, carbon dioxide escapes, producing a fizz: This is due to:
(a) Decrease in solubility on decreasing pressure
(b) Decrease in solubility on decreasing temperature
(c) Decrease in solubility on increasing temperature
(d) Decrease in solubility on increasing pressure

Answer: A

Question: Different components can be separated from petroleum by:
(a) Fractional distillation
(b) FiltrationA
(c) Simple distillation
(d) Chromatography

Answer: A

Question: More than one kind of pure form of matter combines forming………:
(a) Texture
(b) Solution
(c) Mixture
(d) Component

Answer : C