1
KCET 2020
MCQ (Single Correct Answer)
+1
-0

Given $$E_{F{e^{3 + }}/F{e^{2 + }}}^o = + 0.76\,V$$ and $$E_{\mathrm{I}_2 / \mathrm{I}^{-}}^0=+0.55 \mathrm{~V}$$. The equilibrium constant for the reaction taking place in galvanic cell consisting of above two electrodes is $$\left[\frac{2303 R T}{F}=0.06\right]$$

A
$$1 \times 10^7$$
B
$$1 \times 10^9$$
C
$$3 \times 10^8$$
D
$$5 \times 10^{12}$$
2
KCET 2020
MCQ (Single Correct Answer)
+1
-0

If an aqueous solution of $$\mathrm{NaF}$$ is electrolysed between inert electrodes, the product obtained at anode is

A
$$\mathrm{F}_2$$
B
$$\mathrm{H}_2$$
C
$$\mathrm{Na}$$
D
$$\mathrm{O}_2$$
3
KCET 2019
MCQ (Single Correct Answer)
+1
-0

One litre solution of $$\mathrm{MgCl}_2$$ is electrolysed completely by passing a current of $$1 \mathrm{~A}$$ for $$16 \mathrm{~min} 5 \mathrm{~sec}$$. The original concentration of $$\mathrm{MgCl}_2$$ solution was (Atomic mass of $$\mathrm{Mg}=24$$ )

A
$$5 \times 10^{-3} \mathrm{M}$$
B
$$5 \times 10^{-2} \mathrm{M}$$
C
$$0.5 \times 10^{-3} \mathrm{M}$$
D
$$1.0 \times 10^{-2} \mathrm{M}$$
4
KCET 2019
MCQ (Single Correct Answer)
+1
-0

An aqueous solution of $$\mathrm{CuSO}_4$$ is subjected to electrolysis using inert electrodes. The $$\mathrm{pH}$$ of the solution will

A
increase
B
remains unchanged
C
decrease
D
increase or decrease depending on the strength of the current
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