Matter Around Us: Quick Review

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CBSE Class 9: Matter basics

Suii Nala

India

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Matter Around Us: Quick Review


Froggy Jumps Matter Around Us: Quick ReviewVersion en ligne CBSE Class 9: Matter basics par Suii Nala 1 Which of the following is a pure substance? a Sea water b Milk c Water (H2O) 2 A mixture where different components are visible is called: a Solution b Homogeneous mixture c Heterogeneous mixture 3 What separates sand from water by passing through a filter? a Evaporation b Filtration c Decantation 4 Which technique is used to obtain salt from a solution? a Filtration b Decantation c Evaporation 5 A substance that cannot be broken down by physical methods is a/an: a Mixture b Element c Compound 6 Mixtures retain the properties of their components; this is called: a Constant composition b Non-constant composition c Pure substance 7 Which property helps distinguish a solution from a suspension? a Suspension settles immediately b Visible layers throughout c Clear supernatant and small particles 8 Which process is used to obtain a pure liquid from a solution by cooling? a Distillation b Filtration c Crystallization 9 Which method separates pigments in chlorophyll using a mobile phase? a Evaporation b Filtration c Chromatography 10 Which statement is true for a chemical change? a No new substances formed b Only physical state changes c New substances are formed