MCQ
Which solution has the highest $pH $ value
- ✓$1\,M\,KOH$
- B$1\,M\,{H_2}S{O_4}$
- CChlorine water
- DWater containing carbon dioxide
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$ - C{H_2} - \mathop C\limits_{\mathop |\limits_{OH} } H - C{H_3}$
$(i)\, [Xe]\,6s^1$
$(ii)\, [Xe]\,4f^{14}5d^16s^2$
$(iii)\, [Ne]\,3s^23p^5$
$(iv)\, [Ar]\,3d^74s^2$
Which one of the following statements about these elements is not true ?