The answer is: To see how fast hydrogen peroxide decomposes into water and oxygen.
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Answer:
I think the answer would be option d.
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When magnesium ion doesn't give any characteristics colour with the flame test as electronic transisitons do not give out visible light.
The correct answer is option B. X-rays are the waves found in the electromagnetic spectrum at a wavelength of 1x10^-11 - 1x10^-8 m and frequencies of 3x10^16 to 3x10^19 Hz. These waves penetrate easily through certain materials which made them usefule in the field of medicine.
