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- 1. Multiple Choice
Air is regarded as mixture because?
It's pressure may vary.
It's temperature may vary.
Volume changes under different compositions.
It's compositions may vary.
- 2. Multiple Choice
In which of the following constituents are present in the fixed ratio?
Mixture.
Compound.
Solution.
Colloid.
- 3. Multiple Choice
Brass is an example of?
Homogeneous compound.
Homogeneous mixture.
Heterogeneous mixture.
Heterogeneous compound.
- 4. Multiple Choice
When two liquids do not mix, they form two separate layers and are known as
(a) Miscible liquids
(b) Immiscible liquids
(c) Saturated liquids
(d) Super saturated liquids
- 5. Multiple Choice
brass is an alloy. It is a mixture of______
30% Zinc 70% copper
20% copper 80% nickel
40% iron 80% copper
35% gold 65% zinc
- 6. Multiple Choice
What is an element?
A pure substance that cannot be broken down.
Two atoms bonded together.
Two or more different types of atoms bonded together.
An molecule with an unequal distribution of charge.
- 7. Multiple Choice
What are atoms composed of?
Protons and electrons.
Protons, neutrons, and electrons.
Neutrons and electrons.
Ions, elements, and compounds.
- 8. Multiple Choice
How many H atoms are in water?
1
2
3
4
- 9. Multiple Choice
Blood and sea water are
Blood is a mixture whereas sea water is a compound
Blood is a compound and sea water is a mixture
Both are mixtures
Both are Compounds
- 10. Multiple Choice
Define a pure substance?
A pure substance consists of a single type of particles and constant composition.
A pure substance consists of two different types of particles with variable composition
A pure substance consists of many types of particles and different composition
- 11. Multiple Choice
A sample contains two substances and has uniform properties. The sample is ________?
A compound.
A heterogeneous mixture.
An element.
A homogeneous mixture.
- 12. Multiple Choice
Which of the following elements is not a metalloid?
(a) Boron
(b) Silicon
(c) Germanium
(d) Tungsten
- 13. Multiple ChoiceA mixture that is NOT evenly distributed is called ....CompoundedHomogenousHeterogenousSalty
- 14. Multiple ChoiceA mixture that is evenly distributed is called ...HeterozygousHeterogenousHomogenousPeriodic
- 15. Multiple ChoiceChanging the phase, size or shape of something....Chemical changePhysical ChangeSuspensionColloid
- 16. Multiple ChoiceIf you change a substance into a new substance...Partial ChangePhysical ChangeChemical ChangeFreezing
- 17. Multiple ChoiceSubstance with atoms that are all alike.elementcompoundhomogeneous mixtureheterogeneous mixture
- 18. Multiple Choice
______________ is the homogenous mixture of 2 or more substances
Colloid
Tyndall Effect
Solution
Centrifugation
- 19. Multiple Choice
Brass is an alloy of molten Copper in ___________ .
solid Zinc
molten Zinc
gaseous Zinc
molten Tin
- 20. Multiple Choice
Air is regarded as a mixture because __________ .(two or more options might be correct)
its pressure may vary
its temperature may change
its composition may vary
its volume changes under different conditions
- Answer choicesTagsAnswer choicesTags