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Chemistry, Science
9th
grade
Is Matter Around Us Pure - VNGS North
20 questions
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- 1. Multiple Choice
All matter is made up of
Compounds
Atoms
Cells
- 2. Multiple Choice
Are made from a combination of 2 or more different elements...
Elements
Pure Substances
Compounds
- 3. Multiple Choice
H2 would be a .....
Solid
Compound
Element
- 4. Multiple Choice
CO2 would be a .....
Compound
Molecule
Compound AND Molecule
Element
- 5. Multiple ChoiceA combination that can be separated by physical processes is a .....Pure SubstanceGlucoseElementMixture
- 6. Multiple ChoiceA mixture that is NOT evenly distributed is called ....CompoundedHomogenousHeterogenousSalty
- 7. Multiple ChoiceA mixture that is evenly distributed is called ...HeterozygousHeterogenousHomogenousPeriodic
- 8. Multiple ChoiceChanging the phase, size or shape of something....Chemical changePhysical ChangeSuspensionColloid
- 9. Multiple ChoiceIf you change a substance into a new substance...Partial ChangePhysical ChangeChemical ChangeFreezing
- 10. Multiple ChoiceSubstance with atoms that are all alike.elementcompoundhomogeneous mixtureheterogeneous mixture
- 11. Multiple ChoiceWhich of the following is not a clue that a chemical change is taking place?rapid release of energy (heat, light, or sound)phase changeformation of bubblesformation of a precipitate from solution
- 12. Multiple Choice
Which of the following mixtures will be the most difficult to separate?
Iron filings + sand
Sand + water
Sawdust + stones
Nitrogen + hydrogen
- 13. Multiple Choice
A saturated salt water solution was heated and allowed to cool without adding any more salt. What will happen?
Some salt appears to settle at the bottom.
Some more salt can be dissolved now.
No change takes place.
Both A or B.
- 14. Multiple Choice
Which of the following is an example of a solid-in-gas mixture?
Soil
Smoke
Moisture
Dew
- 15. Multiple Choice
Sugar syrup, usually used to coat sweets with sugar, becomes hard when cooled. From this we can conclude that sugar syrup is
a supersaturated solution
an unsaturated solution
not a solution
None of the given options.
- 16. Multiple Choice
Filtration as a method of separation can be used for mixtures that are
homogeneous and liquid-in-gas mixtures
heterogeneous and liquid-in-liquid mixtures
homogeneous and solid-in-liquid mixtures
heterogeneous and solid-in-liquid mixtures
- 17. Multiple Choice
Which changes of state occur during distillation?
Boiling followed by filtration
Boiling followed by condensation
Condensation followed by boiling
Filtration followed by boiling
- 18. Multiple Choice
Two miscible liquids having different boiling points can be separated by
sublimation
Evaporation
Fractional distillation
loading
- 19. Multiple Choice
Choose the correct statement from the following
Oil is miscible in water
Fractional distillation is a method used for separating homogeneous mixture of two liquids.
All pure substances are homogeneous in nature.
The constituent elements of a compound can be separated only by chemical reactions.
- 20. Multiple Choice
Naphthalene and iron filings can be separated by the method of
Evaporation
Filtration
Magnetic Separation
- Answer choicesTagsAnswer choicesTags