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- 1. Multiple Choice
How many states do matter have?
2
3
4
5
- 2. Multiple Choice
What is the chemical name of mercury?
Plumbum
Hydragyrum
Oxygen
Nihonium
- 3. Fill in the Blank
The modern and the most efficient technique of separating coloured substances is called ___________
- 4. Multiple Choice
What is the percentage of nitrogen in the air?
78.00%
78.02%
78.03%
78.01%
- 5. Fill in the Blank
It was the discovery of Oxygen by ____________
- 6. Multiple Choice
In fire extinguishers, the gas used is -
Hydrogen
Carbon Dioxide
Oxygen
Nitrogen
- 7. Multiple Choice
Rust is -
Hydrogen Peroxide
Iron sulphate
Hydrated iron oxide
Iron oxide
- 8. Multiple Choice
Marble is a form of -
Calcium chloride
Calcium hydroxide
Calcium carbonate
Calcium sulphide
- 9. Multiple Choice
Duralumin is an alloy of aluminium and -
Magnesium
Calcium
Sodium
All of these
- 10. Multiple Choice
How many atoms of Hydrogen are there in water compound?
2
1
3
4
- 11. Multiple Choice
What is the atomic no. of hydrogen?
2
1
8
3
- 12. Multiple Choice
What is the atomic no. of oxygen?
1
5
7
6
8
- 13. Multiple Choice
What is the chemical formula for this molecule?C6H6O6C6H606C6H12O66C12H6O - 14. Multiple ChoiceWhat is a compound?One single atomMany atoms of the same elementA molecule made of more than one elementEverything is made of matter
- 15. Multiple ChoiceWhat is an element?An element is an atom and two atomsAn element is one or more atoms of the same kind.An element is more than one of different kinds
- 16. Multiple ChoiceHow many atoms of Nitrogen are in this molecule?3201
- 17. Multiple Choice
The smallest particle that all matter is made from is ....
Matter
Elastic Energy
Atom
Helium
- 18. Multiple ChoiceDry ice (solid carbon dioxide) turning into carbon dioxide gas is aphysical changechemical change
- 19. Multiple ChoiceAn iron nail rusting is a _______________ change. The ________________ property of reactivity explains the iron’s ability to form a new substance.physical, physicalphysical, chemicalchemical, chemicalchemical, physical
- 20. Multiple ChoiceDuring Mr. Nye's science class, students were expected to identify various substances using physical properties they could easily measure. Mr. Nye gave each of the five groups a green, metal cube and asked them to identify what the cube was made of. Matt's cube, after 5 trials, had an average density of 7.40 g/cm3 . His group's cube was made ofaluminumgoldnickelzinc
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