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

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
$$+0.89 \mathrm{~V}$$
2
NEET 2023
MCQ (Single Correct Answer)
+4
-1

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
$$1.34 \mathrm{~cm}^{-1}$$
3
NEET 2023
MCQ (Single Correct Answer)
+4
-1

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:

Assertion A : In equation $$\mathrm{\Delta_rG=-nFE_{cell}}$$, value of $$\mathrm{\Delta_rG}$$ depends on n.

Reason R : $$\mathrm{E_{cell}}$$ is an intensive property and $$\mathrm{\Delta_rG}$$ is an extensive property.

In the light of the above statements, choose the correct answer from the options given below:

A
Both A and R are true but R is NOT the correct explanation of A.
B
A is true but R is false.
C
A is false but R is true.
D
Both A and R are true and R is the correct explanation of A.
4
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

Two half cell reactions are given below.

$$C{o^{3 + }} + {e^ - } \to C{o^{2 + }},\,\,\,\,\,\,\,\,\,E_{C{o^{2 + }}/C{o^{3 + }}}^0 = - 1.81\,V$$

$$2A{l^{3 + }} + 6{e^ - } \to 2Al(s),\,\,\,E_{Al/A{l^{3 + }}}^0 = + 1.66\,V$$

The standard EMF of a cell with feasible redox reaction will be :

A
$$-$$3.47 V
B
+7.09 V
C
+0.15 V
D
+3.47 V
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