Which among the following statements of group-1 elements is NOT true?
Which among the following statements of group-1 elements is NOT true?
Unipositive ions have inert gas configuration.
Compounds of unipositive ions are paramagnetic.
These form colourless compounds in +1 state.
These have high negative values of standard reduction potential.
Solution
This statement is not true and is the incorrect option in context. Paramagnetism arises due to the presence of unpaired electrons in the atomic or molecular electron configuration. Group 1 ions in the +1 oxidation state have full electron shells with no unpaired electrons, so they are diamagnetic rather than paramagnetic. Compounds formed by these ions, such as sodium chloride (NaCl), also do not exhibit paramagnetism because the ions involved have all paired electrons in their structure.