1
NEET 2024 (Re-Examination)
MCQ (Single Correct Answer)
+4
-1

From the following select the one which is not an example of corrosion.

A
Rusting of iron object
B
Production of hydrogen by electrolysis of water
C
Tarnishing of silver
D
Development of green coating on copper and bronze ornaments
2
NEET 2024 (Re-Examination)
MCQ (Single Correct Answer)
+4
-1

The standard cell potential of the following cell $$\mathrm{Zn}\left|\mathrm{Zn}^{2+}(\mathrm{aq})\right| \mathrm{Fe}^{2+}(\mathrm{aq}) \mid \mathrm{Fe}$$ is $$0.32 \mathrm{~V}$$. Calculate the standard Gibbs energy change for the reaction:

$$\mathrm{Zn}(\mathrm{s})+\mathrm{Fe}^{2+}(\mathrm{aq}) \rightarrow \mathrm{Zn}^{2+}(\mathrm{aq})+\mathrm{Fe}(\mathrm{s})$$

(Given : $$1 \mathrm{~F}=96487 \mathrm{C}$$)

A
$$-61.75 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
B
$$+5.006 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
C
$$-5.006 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
D
$$+61.75 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
3
NEET 2024
MCQ (Single Correct Answer)
+4
-1

Match List I with List II.

List I
(Conversion)
List II
(Number of Faraday required)
A. 1 mole of H$$_2$$O to O$$_2$$ I. 3F
B. 1 mol of MnO$$_4^-$$ to Mn$$^{2+}$$ II. 2F
C. 1.5 mol of Ca from molten CaCl$$_2$$ III. 1F
D. 1 mol of FeO to Fe$$_2$$O$$_3$$ IV. 5F

Choose the correct answer from the options given below :

A
A-II, B-IV, C-I, D-III
B
A-III, B-IV, C-I, D-II
C
A-II, B-III, C-I, D-IV
D
A-III, B-IV, C-II, D-I
4
NEET 2024
MCQ (Single Correct Answer)
+4
-1

Mass in grams of copper deposited by passing 9.6487 A current through a voltmeter containing copper sulphate solution for 100 seconds is (Given : Molar mass of $$\mathrm{Cu}: 63 \mathrm{~g} \mathrm{~mol}^{-1}, 1 \mathrm{~F}=96487 \mathrm{C}$$)

A
3.15 g
B
0.315 g
C
31.5 g
D
0.0315 g
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