Which of the following reactions will not occur as written? Which of the following reactions will not occur as written? Sn (s) +
2 answers:
Answer: Option (4) is the correct answer.
Explanation:
According to the reactivity series, a more reactive metal has the ability to replace a less reactive metal in a chemical reaction.
It is known that calcium is more reactive than magnesium. So, in a chemical reaction magnesium can never replace calcium.
For example,
Therefore, this given reaction is not possible. But rest all given reactions are possible.
Thus, we can conclude that out of the given options reaction will not occur as written.
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Answer:
ν = 7.04 × 10¹³ s⁻¹
λ = 426 nm
It falls in the visible range
Explanation:
The relation between the energy of the radiation and its frequency is given by Planck-Einstein equation:
E = h × ν
where,
E is the energy
h is the Planck constant (6.63 × 10⁻³⁴ J.s)
ν is the frequency
Then, we can find frequency,
Frequency and wavelength are related through the following equation:
c = λ × ν
where,
c is the speed of light (3.00 × 10⁸ m/s)
λ is the wavelength
A 426 nm wavelength falls in the visible range (≈380-740 nm)