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- 1. Multiple Choice
1. ___________ are the smallest unit of an element that maintains the properties of that element.
Atoms
Elements
Compounds
mixtures
- 2. Multiple Choice
3. A/an _____________ contains a variety of elements and compounds that are not chemically combined with each other.
atom
element
compound
mixture
- 3. Multiple Choice
4. A __________________ is a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity.
mixture
pure substance
compound
element
- 4. Multiple Choice
5. True or False: elements and compounds are pure substances.
True
False
- 5. Multiple Choice
6. Elements are broadly classified as metals, nonmetals, and _________________.
compounds
mixtures
metalloids
- 6. Multiple Choice
All the following are mixtures except
Air
Sea Water
Water
Milk
- 7. Multiple Choice
A ______________ is made up of different kinds of atoms chemically combined.
element
compound
mixture
molecule
- 8. Multiple Choice
A ______________ mixture is one that does not have a uniform composition.
heterogeneous
homogenous
pure substance
- 9. Multiple Choice
A _________________ mixture is one where the substances are evenly spread throughout.
heterogeneous
homogeneous
pure substance
- 10. Multiple Choice
In a ______________, one substance is dissolved in another substance.
solution
suspension
colloid
- 11. Multiple Choice
When there is one type of atom
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
- 12. Multiple Choice
Which of these is a compound?
Aluminium (Al)
Carbon Dioxide (CO2)
Nitrogen (N)
Sand
- 13. Multiple Choice
Which of these is an element?
Salt (NaCl)
Water (H20)
Oxygen (O)
Carbon Dioxide (CO2)
- 14. Multiple Choice
Is air an element, compound or mixture?
Element
Compound
Mixture
- 15. Multiple Choice
Pure substances are classified into what substance? Name them
Elements
Compounds
Elements and Compounds
None of These
- 16. Multiple Choice
Pure substance consists of particles of how many kinds?
2
4
6
1
- 17. Multiple Choice
Which molecule is most responsible for the adverse effects of pollution and deforestation on Earth's climate?
hydrogen gas
carbon dioxide
ammonia
iron oxide
- 18. Multiple Choice
Which is a natural source of greenhouse gases that cause climate change?
burning fossil fuels
deforestation
volcanic eruptions
- 19. Multiple Choice
Causes of Climate Change are
only human activity
a combination of natural and human forces
only natural forces
- 20. Multiple Choice
In what place are the Earths warmest climates?
Near the South Pole
Along the equator
Near the North Pole
The whole Earth
- 21. Multiple Choice
The height above sea level is called…
Measurement of height
Elevation
Height
Altitude
- 22. Multiple Choice
what is the enhanced green house effect
increased concentrations of greenhouse gases has led to an increase in the global average surface temperatures
it is a bigger green house
it is a high amount of gas that lingers in earths earths atmosphere the increase the temperature
increased gas in atmosphere
- 23. Multiple Choice
The three subatomic particles are
proton, neutron, electron
proton, nucleus, electron
protein, neutron, electricity
proton, neutral, electives
- 24. Multiple Choice
99.9% of the atom's mass is found where?
nucleus
protons
electron cloud
neutrons
- 25. Multiple Choice
Subatomic particles with a negative charge
Electrons
Neutrons
Protons
Quarks
- 26. Multiple Choice
.
Subatomic particles that are neutral in charge
Nucleus
Electrons
Protons
Neutrons
- 27. Multiple Choice
All matter is made of
energy
atoms
air
chemistry
- 28. Multiple ChoiceIn this picture, the Electrons are found in which color?BlueRedGreen
- 29. Multiple Choice
What is the Atomic Mass Number of the element mentioned above
12
6
C
16
- 30. Multiple Choice
What charge do protons have?
Positive
Negative
Neutral
- 31. Multiple Choice
Ink can be separated by a method of -----------------------------------------------
distillation
filtration
chromatography
sedimentation
- 32. Multiple Choicechromatography separates the mixture of dyes on the basis of their ----------------------------densitysolubilitygravityboiling point
- 33. Multiple ChoiceOn the chromatogram given -------------- is mixture.redorangegreenblack
- 34. Multiple Choice
A pure substance shows ------------------ spot on chromatogram
0
1
2
3
- 35. Multiple Choice
A substance is soluble if it can be dissolved.
In paper chromatography, the most soluble solute _____________________ .
does not move from the start point
stays closest to the start point
travels furthest away from the start point
can be found in the middle of the chromatogram
- 36. Multiple Choice
What is the correct image of paper chromatography???
- 37. Multiple Choice
What is chromatography?
A way to see pretty colors
A laboratory technique used to separate a mixture.
A form of distillation
- 38. Multiple Choice
Two or more substances that are mixed together but not chemically combined create a...
solvent
compound
mixture
- 39. Multiple Choice
Which of the following mixture/s is/are separated by chromatography?
Pigments from natural colours
Colours in a dye
Colours of flowers extracts
All the above
- 40. Multiple Choice
It is the how we can measure how a solute easily dissolves in a certain solvent.
Solubility
Solution
Solvation
Solute
- 41. Multiple Choice
A solid solute that will dissolve in a liquid solvent is said to be
Miscible
Soluble
Solvent
Insoluble
- 42. Multiple Choice
Two liquids that will not mix with one another are said to be
Immiscible
Soluble
Miscible
Insoluble
- 43. Multiple ChoiceWhat will allow more solute to be dissolved in a solvent.adding more solutestiringcooling solutionheat
- 44. Multiple ChoiceA saturated solution is______No more solute can be dissolvedMore solute can be dissolvedThe solvent and solution
- 45. Multiple Choice
Ink can be separated by a method of -----------------------------------------------
distillation
filtration
chromatography
sedimentation
- 46. Multiple Choice
A pure substance shows ------------------ spot on chromatogram
0
1
2
3
- 47. Multiple Choice
A substance is soluble if it can be dissolved.
In paper chromatography, the most soluble solute _____________________ .
does not move from the start point
stays closest to the start point
travels furthest away from the start point
can be found in the middle of the chromatogram
- 48. Multiple Choice
What is chromatography?
A way to see pretty colors
A laboratory technique used to separate a mixture.
A form of distillation
- 49. Multiple Choice
Two or more substances that are mixed together but not chemically combined create a...
solvent
compound
mixture
- 50. Multiple Choice
Which of the following mixture/s is/are separated by chromatography?
Pigments from natural colours
Colours in a dye
Colours of flowers extracts
All the above
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