Which one of the following is a physical change?
A) Rusting of iron
B) Fermenting of grape juice
C) Souring of milk
D) Sharpening a pencil
Correct Answer:
Verified
Q6: One product of photosynthesis is
A) hydrogen.
B) oxygen.
C)
Q7: A chemical reaction is balanced by applying
Q8: A chemical reaction generally has a great
Q9: Which of the following is a chemical
Q10: The substances that are formed by a
Q12: The equation H2O2 → H2O + O
Q13: Which of the following does not take
Q14: The equation 1H2SO4 → 1H2O + 4O2
Q15: When the equation NH4NO3→ N2O + H2O
Q16: A balanced chemical equation will have the
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