MHT CET 2023 Chemistry question

Not in JEE Main or NEET syllabus

Which from following properties is exhibited by group 2 elements

(A)Act as insert elements in +1 state
(B)Form MH type hydrides with hydrogen on heatingCorrect
(C)Elements at the top in the group catch fire when kept on water
(D)Reducing power of these elements is more than group I elements

Answer: (B)

Solution

Alkaline earth metals (Mg, Ca, Sr, Ba) combine directly with hydrogen on heating to give ionic hydrides of formula , e.g. ; so (b) is correct. (a) is wrong: group 2 elements show only the +2 oxidation state (the second ionisation enthalpy is easily compensated by lattice

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Question ID VK-098009