1
WB JEE 2024
MCQ (More than One Correct Answer)
+2
-0
Change Language

Identify the correct statement(s) :

A
The oxidation number of $$\mathrm{Cr}$$ in $$\mathrm{CrO}_5$$ is +6
B
$$\Delta \mathrm{H}>\Delta \mathrm{U}$$ for the reaction $$\mathrm{N}_2 \mathrm{O}_4(\mathrm{~g}) \rightarrow 2 \mathrm{NO}_2$$ (g), provided both gases behave ideally
C
$$\mathrm{pH}$$ of $$0.1(\mathrm{~N}) \mathrm{H}_2 \mathrm{SO}_4$$ is less than that of $$0.1(\mathrm{~N}) \mathrm{HCl}$$ at $$25^{\circ} \mathrm{C}$$
D
$$\left(\frac{\mathrm{RT}}{\mathrm{F}}\right)=0.0591$$ volt at $$25^{\circ} \mathrm{C}$$
2
WB JEE 2019
MCQ (More than One Correct Answer)
+2
-0.67
Change Language
Identify the correct statement(s) :
A
The oxidation number of Cr in CrO5 is + 6.
B
$$\Delta$$H > $$\Delta$$U for the reaction N2O4(g) $$\to$$ 2NO2(g) provided both gases behave ideally.
C
pH of 0.1 N H2SO4 is less than that of 0.1 N HCl at 25$$^\circ$$C.
D
$$\left( {{{RT} \over F}} \right)$$ = 0.0591 volt at 25$$^\circ$$C
3
WB JEE 2017
MCQ (More than One Correct Answer)
+2
-0
Change Language
The role of fluorspar, which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite is
A
as a catalyst
B
to make fused mixture conducting
C
to lower the melting temperature of the mixture
D
to decrease the rate of oxidation of carbon at anode
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