MCQ
Which of the following is correct
- A

- B

- ✓

- DAll




Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The half life of the reaction is $.....\,min$ [Use $: \ln 2=0.69, \ln 10=2.3$
Properties of logar $\ln \left(\frac{\mathrm{x}}{\mathrm{y}}\right)=\ln \mathrm{x}-\ln \mathrm{y}$
| Element | Electronic configuration |
| $X$ | $1s^2\,2s^2\,2p^2$ |
| $Y$ | $1s^2\,2s^2\,2p^6\,3s^1$ |
| $Z$ | $1s^2\,2s^2\,2p^6\,3s^2\,3p^6\,3d^{10}\,4s^2\,4p^5$ |
Which set of properties match correctly with properties of the hydrides of these elements
$Zn(s)\,\,|,\,Zn^{+2}_{(aq.)}\,\,|| Ag^+_{(aq.)}\,\,| Ag(s)$
$E^o_{Zn^{+2}/Zn}\,\,=\,-\,0.76V\,\, ;\,\, E^o_{Ag^+ /Ag}\,\, = 0.80V$

Reason : Oxidation state of $Cl$ in $HClO_4$ is $+7$ and in $HClO_3$, it is $+ 5$.