Vilakshan Gupta
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How to derive the number of spectral lines?
10 votes

When you move from level $n_1$ to level $n_2$, the total number of energy levels are $n_2-n_1+1$ (including $n_1$ and $n_2$). Now, you want to find the total number of possible spectral lines in the ...

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How to compare stability between 5‐methylcyclohexa‐1,3‐diene and 3‐methylenecyclohexene?
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8 votes

As far as I have read, in general, exocyclic double bonds (which are outside the ring) are stable for 3 or 4 numbered rings while endocyclic double bonds (which are inside the ring) are stable in 5 or ...

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Mesomeric effect in -NHCOR and -OR
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7 votes

If you check out the $\mathrm{p}K_\mathrm{a}$ values of paracetamol (acetaminophen) , it is 9.38 while $\mathrm pK_\mathrm a$ of para-methoxybenzene is 10.1. So, $\ce{-OR}$ should exert a greater ...

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Conversions in amines
5 votes

As @Waylander mentioned in comments, more information is needed to guess A and B. Since, in the question other products have not been mentioned, I am writing the answers for them with reasoning. 1) ...

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Confusion in comparing the contribution of resonating structures to resonance hybrid
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4 votes

For $b$, you have equivalent resonating structures as the structures are identical. The structures $a'$ and $b'$ are not correct as nitrogen cannot expand it's octet. For $a''$ and $b''$, the first ...

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Equilibrium for the synthesis of methanol
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3 votes

Note that under the given conditions, methanol cannot exist in the liquid state, however since you are given in the problem that methanol is obtained in liquid state, you will only consider the ...

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How to calculate Kp without knowing the volume?
2 votes

So you need $$K_p = \frac{p_{\ce{H2S}}^3}{p_{\ce{H2}}^3}$$ where $p_{\ce{H2S}}$ and $p_{\ce{H2}}$ are partial pressures of $\ce{H2S}$ and $\ce{H2}$ respectively. Partial pressure is nothing but the ...

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Hydrolysis of nitriles: Amide vs Carboxylic acid
2 votes

Yes, you are correct. For converting a nitrile to amide, we do controlled hydrolysis. So, first amide is obtained and then ammonium salt of the carboxylic acid is obtained. So, the reaction would be $$...

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Ellingham Diagram for carbon
2 votes

You are indeed right, I confirmed that it is the fault in the diagram itself. See the diagram by wikipedia:

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What is the double bond equivalence of the following compound?
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1 votes

As Ivan Neretin pointed out in the comments, $\pi$ bonds will remain same whether or not in resonance. However, if you have trouble counting the double bond equvalent, you can directly use the formula ...

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what is the change in enthalpy during constant volume
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1 votes

We define a state function enthalpy as $$H=U+PV$$ Since we cannot measure the absolute value of enthalpy, but the change in it, we modify the equation to $$\Delta H= \Delta U +\Delta(PV)$$ Which is ...

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Why is oxygen sp2 hybridised in acetate ion
1 votes

Oxygen atom in the acetate ion is $\ce{sp^2}$ hybridized because as @Ivan Neretin said in comments, both the atoms are identical because the negative charge is in resonance with the $\pi$ bond of the ...

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Specific Heats for Non-Constant Processes
0 votes

Specific heat capacity $\ce{C_p}$ can be used to calculate the enthalpy change even for the processes that are not at constant pressure as enthalpy is a state function, that is, it doesn't matter by ...

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How can one say pressure is constant in thermodynamics?
0 votes

Charle's Law has nothing to do with the first law of thermodynamics, it simply states that for a gas, at constant pressure, volume will be directly proportional to temperature. Whereas, the first law ...

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