Question

Which of the following chemical reactions are impossible [ ]

i) Aluminium react with dil HNO3

and liberate H2

gas

ii) Magnesium react with very dilute HNO3

and liberate H2

gas

iii) Copper and silver can displace H2

from very dil acids

iv) Aluminium, zinc and iron can react with cold or hot water and liberate H2

gas​

Answer 1

Explanation:

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3 equation is not possible..

Answer 2

Answer:

option III

cu and ag cannot displace from dil acids