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1
JEE Main 2022 (Online) 29th June Morning Shift
Numerical
+4
-1 English
Hindi

A dilute solution of sulphuric acid is electrolysed using a current of 0.10 A for 2 hours to produce hydrogen and oxygen gas. The total volume of gases produced a STP is _____________ cm3. (Nearest integer)

[Given : Faraday constant F = 96500 C mol$$-$$1 at STP, molar volume of an ideal gas is 22.7 L mol$$-$$1]

2
JEE Main 2022 (Online) 28th June Evening Shift
Numerical
+4
-1 English
Hindi

For the given reactions

Sn2+ + 2e$$-$$ $$\to$$ Sn

Sn4+ + 4e$$-$$ $$\to$$ Sn

the electrode potentials are ; $$E_{S{n^{2 + }}/Sn}^o = - 0.140$$ V and $$E_{S{n^{4 + }}/Sn}^o = - 0.010$$ V. The magnitude of standard electrode potential for $$S{n^{4 + }}/S{n^{2 + }}$$ i.e. $$E_{S{n^{4 + }}/S{n^{2 + }}}^o$$ is _____________ $$\times$$ 10$$-$$2 V. (Nearest integer)

3
JEE Main 2022 (Online) 28th June Morning Shift
Numerical
+4
-1 English
Hindi

The quantity of electricity in Faraday needed to reduce 1 mol of Cr2O$$_7^{2 - }$$ to Cr3+ is ____________.

4
JEE Main 2022 (Online) 27th June Evening Shift
Numerical
+4
-1 English
Hindi

For the reaction taking place in the cell :

Pt (s)| H2 (g)|H+(aq) || Ag+(aq) |Ag (s)

E$$_{cell}^o$$ = + 0.5332 V.

The value of $$\Delta$$fG$$^\circ$$ is ______________ kJ mol$$-$$1. (in nearest integer)