1Nitrides of Li is possible but not of Mg without presence of a rare earth metal or group 1,2 metals.
Mg reacts rapidly with water (high reactivity)
MgO2 is also possible
No idea about MgCl soluble in ethanol... i think A,D should be incorrect ans.
Pick out the statement(s) which is/are not true about the diagonal relationship of Li and Mg.
(A) Like Li, Mg forms a nitride by direct combination with nitrogen.
(B) Like lithium, magnesium reacts rapidly with water.
(C) Like MgO, Li2O combines with excess oxygen to give super oxide.
(D) Like LiCl, MgCl2 is deliquescent and soluble in ethanol.
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6 Answers
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1Hmm... remember we learnt the reactivity series in grades 11 and 12? In that, the metals above hydrogen are very reactive. If you see that series, Mg comes third or fourth, so it is supposed to be really reactive with water to form hydroxide.
Mg forms superoxides, But no idea about Lithium
Check out this page :
http://www.tutorvista.com/content/chemistry/chemistry-iii/s-block-elements/lithium.php
Here it is also mentioned that Mg forms nitrides like Li. My earlier post stated that Mg does not form nitrides, but that is wrong.
MgCl solubility... i think it should be because of polarity.
