1
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Cell notation, $$\begin{gathered} M\left|M^{2+} \| M^{2+}\right| M. \\ 0.01 \quad 0.0001 \end{gathered}$$ If value of $$E^{\circ}{ }_{\text {cell }} \text { is } 4 \text { volt ( Given } \frac{R T}{F} \text { in } 10=0.06 \text { ) }$$

A
3.94 V
B
4.06 V
C
2.03 V
D
8.18 V
2
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Which of the following has maximum iron content?

A
Cast Iron
B
Wrought Iron
C
Pig Iron
D
Stainless Steel
3
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

$$\mathrm{pH}$$ of a salt solution of weak acid $$(\mathrm{p} K_a=4)$$ and weak base $$(\mathrm{p} K_b=5)$$ at $$25^{\circ}$$ is

A
6.5
B
6
C
7
D
7.5
4
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Correct increasing order for the wavelength of absorption in the visible region for the complexes of $$\mathrm{Co}^{3+}$$ is

A
$$\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-},\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+} \text {, } \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right]^{+2}$$
B
$$\begin{aligned} & {\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-},\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{3+}} \\ & {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right]^{2+},\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}} \end{aligned}$$
C
$$\begin{aligned} & {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+},\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-},\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{3+},} \\ & {\left[\mathrm{Co}\left(\mathrm{NH}_3\right) \mathrm{Cl}\right]^{+2}} \end{aligned}$$
D
$$\begin{aligned} & {\left[\mathrm{Co}(\mathrm{NH})_5 \mathrm{Cl}\right]^{+2},\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{3+},} \\ & {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+},\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}} \end{aligned}$$
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