The answer to your question is 4. I and F.
Carbon has a tendency to form covalent bonds.
Answer:
![l=3.5*10^{-10}m](https://tex.z-dn.net/?f=l%3D3.5%2A10%5E%7B-10%7Dm)
Explanation:
From the question we are told that:
1st Energy ![E_1=12eV=4(3eV)](https://tex.z-dn.net/?f=E_1%3D12eV%3D4%283eV%29)
2nd Energy ![E_2=27eV=9(3eV)](https://tex.z-dn.net/?f=E_2%3D27eV%3D9%283eV%29)
3rd Energy ![E_3=48eV=16(3eV)](https://tex.z-dn.net/?f=E_3%3D48eV%3D16%283eV%29)
Generally the equation for Energy E for electron in one dimensional box at ground state
is mathematically given by
![E_0=\frac{h}{8ml^2}](https://tex.z-dn.net/?f=E_0%3D%5Cfrac%7Bh%7D%7B8ml%5E2%7D)
![E_0=\frac{h}{8ml^2}](https://tex.z-dn.net/?f=E_0%3D%5Cfrac%7Bh%7D%7B8ml%5E2%7D)
Therefore Length a is mathematically given as
![l=\sqrt{\frac{h^2}{8mE_0} }](https://tex.z-dn.net/?f=l%3D%5Csqrt%7B%5Cfrac%7Bh%5E2%7D%7B8mE_0%7D%20%7D)
![l=\sqrt{\frac{(6.625*10^{-34})^2}{8(9.1*19^{-31}{(3eV(1.6*10^{-19}))}}](https://tex.z-dn.net/?f=l%3D%5Csqrt%7B%5Cfrac%7B%286.625%2A10%5E%7B-34%7D%29%5E2%7D%7B8%289.1%2A19%5E%7B-31%7D%7B%283eV%281.6%2A10%5E%7B-19%7D%29%29%7D%7D)
![l=3.5*10^{-10}m](https://tex.z-dn.net/?f=l%3D3.5%2A10%5E%7B-10%7Dm)
solids have particles that are closely packed to each other that they can barely move
The correct answer is option B, that is, CO + H2O → H2 + CO2
The redox reactions are regarded as the chemical reactions in which one reactant goes through the process of reduction and one reactant goes through the process of oxidation. The reduction reactions are the reactions in which gain of electrons occurs, while oxidation reactions are the reactions in which loss of electrons occurs.
From the mentioned options, only option B, that is, CO + H2O → H2 + CO2 is a kind of redox reaction. In this, the carbon is getting oxidized from +2 to +4 oxidation state, and hydrogen is getting reduced from +1 to 0 oxidation state. Hence, this reaction can be regarded as a redox reaction.