Apurvium
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The melting and boiling point decreases down the group up to group 14 (not including transition metals), but the trend reverses from group 15. Why?
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7 votes

The problem is, we want to see a trend in everything. There are various factors that govern melting point and boiling point which is the reason of perceived anomalies. "The equation which has ...

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Why do chloroform and benzene exhibit negative deviation from Raoult's law?
5 votes

This is because when these liquids are mixed, H-bonding type interactions are formed between hydrogen atom of chloroform (partial positive charge due to 3 Cl atoms) and 'pi' electron cloud of benzene ...

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Coordination isomerism variation
3 votes

Yes, it is. In both the cases, the number of ligands remains same, which is according to the definition in Wikipedia. For any type of structural isomerism, the premise is that the primary valence and ...

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Why are hydrated lithium ions' radii larger than hydrated sodium ions' radii?
2 votes

Down a group, ionic radii increases. But at the same time, due to decrease in charge density, the ions attract less number of water molecules. The smallest cation (with the same charges) having ...

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Why does NH3 cause pairing in case of some metal complexes and doesn't in case of others?
2 votes

In case of $\ce{[Ni(NH3)6]^2+}$, the configuration is $3\text d^8$. After splitting from spherical to octahedral field, the lower energy orbitals, i.e., $\text t_{2g}$ are already filled. Therefore, ...

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How to find standard electrode potential of a reaction resulting from two different reactions?
Accepted answer
2 votes

Q2) Calculate standard cell potential of the following reaction- $$14\ce{H+}+6\ce{Cl-}+\ce{Cr2O7^2-}\to 3\ce{Cl2}+2\ce{Cr^3+}+7\ce{H2O}$$ Given that $E_{\ce{Cr2O7^2-}|\ce{Cr^3+}}^o=E_1$ and $E_{\ce{Cl-...

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Can ethylene glycol enhance the acidity of orthoboric acid?
2 votes

I do not see any reason why the following reaction cannot take place, which will consume $\ce{[B(OH)4]-}$ and the concerned reaction will move in forward direction to increase the acidity of ...

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Is there any relation between reaction quotient and rate constant in the context of order of the reaction?
Accepted answer
2 votes

When you are implying reaction quotient, you should use $Q$ instead of $K$. As $Q$ is defined at any concentrations other than equilibrium. When you are changing $[\ce{A}]$ and $[\ce{B}]$, $[\ce{A2B}]...

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Are Slater’s rule and lanthanide contraction contradictory?
1 votes

Take the example of group-12 chlorides $\ce{ZnCl2}$, $\ce{CdCl2}$ and $\ce{HgCl2}$. The ionic radii (VI coordination) increases from $\ce{Zn++}(\pu{0.74~\overset \circ A)}$ to $\ce{Cd++}(\pu{0.95~\...

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Which is more acidic BF3 or AlCl3?
1 votes

Applying Pearson's HSAB concept- Toward hard Lewis bases such as ethyl acetate, the Lewis acidities of the halides of group 13 elements would decrease as the softness of the acceptor element increases:...

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Comparing reactivity of 1-chloroethane and 1-chloropropane in an SN1 reaction
1 votes

Consider the following assumptions to somehow force these substrates to proceed for $\ce{S_N1}$ reaction mechanism: Low temperature Polar protic solvent Low concentration of nucleophile w.r.t. ...

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Multiple hydride shifts
1 votes

Yours is a primary alcohol and it has $\beta$ hydrogen atoms also. Thus, it will undergo $\pu E2$ mechanism. In this mechanism removal of protonated hydroxyl group and $\beta ~\pu H$ happen at once (...

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Finding the n-factor of C₂O₄²⁻
0 votes

By using formula: $\ce{\overset{(+3)}{C}_2O4^2- ->[oxidation]~\overset{(+4)}{C}O2}$ $n$-factor $=$ change in oxidation number per $\ce{C}$ atom $\times$ total number of $\ce{C}$ atoms in $\ce{C2O4^...

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Bond angles in BrF5
0 votes

Consider the figure given in the previous answer: Due to a lone pair of $\ce{e-}$ and thus, due to lp-bp repulsions, all equatorial fluorine atoms will move upwards but still remain in a plane. Now, ...

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Which will have more Lewis acid character out of BCl3 and AlCl?
0 votes

(In $\ce{AlCl3}$ the possible backbonding is between $\ce{3p_z-3p_z}$ orbitals but due to large size of orbitals, it is not efficient) Applying Pearson's HSAB concept- Toward hard Lewis bases such as ...

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Reaction Mechanisms: Free Radical Halogenation
0 votes

H. C. Brown has suggested that the halogen atom does add but, at high temperatures, is expelled before the second step of free radical addition can occur$^1$. Addition of halogen atom gives this ...

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Why are there free electrons in a metal?
-1 votes

Though a bit different from what is asked, few things are worth noting: Electrons barely move in metal wires carrying electricity. Electrons do not carry energy, the electric and magnetic fields ...

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What does the change in Gibbs Free Energy refer to?
-1 votes

Enthalpy, entropy and Gibbs energy are extensive properties and also state functions. Any difference can also be defined as: Reactants$\ce{->}$Products; $\Delta_r H = \Sigma H_{\text{Products}} - \...

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The order of increasing covalent nature in group 12 (Zn, Cd and Hg)
-1 votes

The ionic radii (VI coordination) increases from $\ce{Zn^2+}(\pu{0.74 Å)}$ to $\ce{Cd^2+}(\pu{0.95 Å)}$ to $\ce{Hg^2+}(\pu{1.02Å)}$. Applying Fajans' rule, the expected order of covalent character: $$\...

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