1
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

The $$\mathrm{E}^{\Theta}$$ values for

$$\begin{aligned} & \mathrm{Al}^{+} / \mathrm{Al}=+0.55 \mathrm{~V} \text { and } \mathrm{Tl}^{+} / \mathrm{Tl}=-0.34 \mathrm{~V} \\ & \mathrm{Al}^{3+} / \mathrm{Al}=-1.66 \mathrm{~V} \text { and } \mathrm{T}^{3+} / \mathrm{Tl}=+1.26 \mathrm{~V} \end{aligned}$$

Identify the incorrect statement

A
$$\mathrm{Al}$$ is more electropositive than $$\mathrm{Tl}$$
B
$$\mathrm{Tl}^{3+}$$ is a good reducing agent than $$\mathrm{Tl}^{1+}$$
C
$$\mathrm{Al}^{+}$$ is unstable in solution
D
$$\mathrm{Tl}$$ can be easily oxidised to $$\mathrm{Tl}^{+}$$ than $$\mathrm{Tl}^{3+}$$
2
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

Molar conductance of an electrolyte increase with dilution according to the equation:

$$\Lambda_{\mathrm{m}}=\Lambda_{\mathrm{m}}^{\circ}-\mathrm{A} \sqrt{\mathrm{c}}$$

Which of the following statements are true?

(A) This equation applies to both strong and weak electrolytes.

(B) Value of the constant $$\mathrm{A}$$ depends upon the nature of the solvent.

(C) Value of constant $$\mathrm{A}$$ is same for both $$\mathrm{BaCl}_2$$ and $$\mathrm{MgSO}_4$$

(D) Value of constant $$\mathrm{A}$$ is same for both $$\mathrm{BaCl}_2$$ and $$\mathrm{Mg}(\mathrm{OH})_2$$

Choose the most appropriate answer from the options given below:

A
(A) and (B) only
B
(A), (B) and (C) only
C
(B) and (C) only
D
(B) and (D) only
3
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

The correct value of cell potential in volt for the reaction that occurs when the following two half cells are connected, is

$$\begin{aligned} & \mathrm{Fe}_{(\mathrm{aq})}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Fe}(\mathrm{s}), \mathrm{E}^{\circ}=-0.44 \mathrm{~V} \\ & \mathrm{Cr}_2 \mathrm{O}_7^{2-} \text { (aq) }+14 \mathrm{H}^{+}+6 e^{-} \rightarrow 2 \mathrm{Cr}^{3+}+7 \mathrm{H}_2 \mathrm{O} \\ & \mathrm{E}^{\circ}=+1.33 \mathrm{~V} \end{aligned}$$

A
$$+1.77 \mathrm{~V}$$
B
$$+2.65 \mathrm{~V}$$
C
$$+0.01 \mathrm{~V}$$
D
$$+0.89 \mathrm{~V}$$
4
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

The conductivity of centimolar solution of $$\mathrm{KCl}$$ at $$25^{\circ} \mathrm{C}$$ is $$0.0210 ~\mathrm{ohm}^{-1} \mathrm{~cm}^{-1}$$ and the resistance of the cell containing the solution at $$25^{\circ} \mathrm{C}$$ is $$60 ~\mathrm{ohm}$$. The value of cell constant is -

A
$$3.28 \mathrm{~cm}^{-1}$$
B
$$1.26 \mathrm{~cm}^{-1}$$
C
$$3.34 \mathrm{~cm}^{-1}$$
D
$$1.34 \mathrm{~cm}^{-1}$$
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