Biology, asked by mmehak8711, 1 month ago

Which of the following elements dissolves NAOH to evolve H2 gas
1.Thallium
2.Indium
3.Aluminium
4.Magnesium

Answers

Answered by Muthuraman30062006

0

Answer:

Aluminium

Explanation:

Aluminium dissolves in cone, alkalies on heating forming meta aluminate with the evolution of gas

Al+2NaOH+2H2O ----> 2NaAlO2+3H20

(In aqueous solution the actual meta aluminate species present is .

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