1
IAT (IISER) 2020
MCQ (Single Correct Answer)
+4
-1
The total number of nodes for a given principal quantum number $n$, and azimuthal quantum number $\ell$, are
A
sum of $\ell$ angular nodes and $n+\ell-1$ radial nodes
B
sum of $\ell$ angular nodes and $n-\ell-1$ radial nodes
C
sum of $\ell+1$ angular nodes and $n-\ell-1$ radial nodes
D
sum of $\ell+1$ angular nodes and $n+\ell-1$ radial nodes
2
IAT (IISER) 2020
MCQ (Single Correct Answer)
+4
-1
Which among the following is NOT correct?
A
$\mathrm{H}_3 \mathrm{PO}_4$ is a tribasic acid
B
$\mathrm{H}_3 \mathrm{PO}_3$ is a dibasic acid.
C
$\mathrm{H}_3 \mathrm{PO}_2$ is a monobasic acid.
D
$\mathrm{H}_3 \mathrm{PO}_2$ is a tribasic acid
3
IAT (IISER) 2020
MCQ (Single Correct Answer)
+4
-1
Which among the following is NOT correct regarding the first ionization potential $\left(\mathrm{IP}_1\right)$ of period $I I I$ elements $M g, A l, S i, P$ and $S$ ?
A
$P < S$
B
$A l < M g$
C
$A l < S i$
D
$S i < P$
4
IAT (IISER) 2020
MCQ (Single Correct Answer)
+4
-1
Which one of the following aqueous solutions gives the most intense colour?
A
$0.1 \mathrm{M}\left[\mathrm{Mn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_2$
B
$0.1 \mathrm{M}\left[\mathrm{Mn}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$
C
$0.1 \mathrm{M}\left[\mathrm{Mn}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \mathrm{Cl}$
D
$0.1 \mathrm{M} \mathrm{KMnO}_4$
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