PHYSICAL AND CHEMICAL CHANGES
1. Burning of paper isa--- change
2. The chemical formula of iron oreide is ---
3. Melting of wax isa------change
4.A-is the smallest partide of an element or a compound that can exist
by itself
5. Two atoms of an dement combine to form a
6. Which of the following is a chemical change?
a) bursting of a fire cracker b) germination of seed c) coal formation d) all of
these
7. How crystals of pure substance are obtained
a) Crystallization b) chromatography c) sedimentation d) galvanization
8. In which type of change a new substance is formed
a) Physical change b) chemical change c) in both
9. Common salt is produced from sea water by
a) Evaporation and crystallization only evaporation
10. A reversible change is
a) is a chemical change b) is a physical change c) forms new substance
Answers
Answered by
1
Answer:
1 chemical change
2 Fe2O3
3 physical change
4 atom
5 compound
6 d) all of these
7 a) crystallization
8 b) chemical change
9 only evaporation
10 b) is a physical change
Answered by
1
Answer:
1) chemical change
2)(Fe(OH)
3) chemical change
4) element
5)molecule
6)all of these
7)___
8)__
9) chemical change
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