Question

State the relevant reason for the following:
a) Copper exhibit variable valency of +1 and +2.
b) sodium hydroxide turns into a colourless solution when exposed to air.
c) Copper cannot displace hydrogen gas from dilute sulphuric acid.
d) Silver bromide is kept in dark-colored bottles only​

Answer 1

c. Metal that are more reactive than hydrogen displace it from dilute sulfuric acid and metals that are less reactive than hydrogen do not displace. For eg: Copper.

Answer 2

Answer:

c. is your answer

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