Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$:
Assertion $A$ : The stability order of +$1$ oxidation state of $\mathrm{Ga}$, In and $\mathrm{Tl}$ is $\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}$.
Reason $R$ : The inert pair effect stabilizes the lower oxidation state down the group.
In the light of the above statements, choose the correct answer from the options given below :
Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$:
Assertion $A$ : The stability order of +$1$ oxidation state of $\mathrm{Ga}$, In and $\mathrm{Tl}$ is $\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}$.
Reason $R$ : The inert pair effect stabilizes the lower oxidation state down the group.
In the light of the above statements, choose the correct answer from the options given below :
- [JEE MAIN 2024]
- A
Both $A$ and $R$ are true and $R$ is the correct explanation of $A$.
- B
$A$ is true but $R$ is false.
- C
Both $A$ and $R$ are true but $R$ is $NOT$ the correct explanation of $A$.
- D
$A$ is false but $R$ is true.
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When borax is heated with $CoO$ on a platinum loop, blue coloured bead formed is largely due to
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- [JEE MAIN 2022]
Group $13$ elements show $+1$ and $+3$ oxidation states. Relative stability of $+3$ oxidation state may be given as
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Given below are two statements:
Statement $I$: Group $13$ trivalent halides get easily hydrolyzed by water due to their covalent nature.
Statement $II$: $\mathrm{AlCl}_3$ upon hydrolysis in acidified aqueous solution forms octahedral $\left[\mathrm{Al}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ ion.
In the light of the above statements, choose the correct answer from the options given below :
Given below are two statements:
Statement $I$: Group $13$ trivalent halides get easily hydrolyzed by water due to their covalent nature.
Statement $II$: $\mathrm{AlCl}_3$ upon hydrolysis in acidified aqueous solution forms octahedral $\left[\mathrm{Al}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ ion.
In the light of the above statements, choose the correct answer from the options given below :
- [JEE MAIN 2024]
The hardest substance amongst the following is
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