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Question
Which of the following is incorrect with respect to metals?
Options:
A .  If one of the metals is mercury in an alloy, then the alloy is known as an amalgam.
B .  The metals high up in the reactivity series are very reactive.
C .  Metals above hydrogen in the reactivity series cannot displace hydrogen from dilute acids.
D .  Metals reacts with dilute acid to form its salt and hydrogen gas.
Answer: Option C
:
C

  • Alloys that contain mercury are known as amalgams.

  • The metals high up in the reactivity series are very reactive.

  • More reactive metals can replace less reactive metals.

  • Metals which are above hydrogen in the reactivity series will displace hydrogen from diluteacids.


For example: Fe(s)+CuSO4(aq)FeSO4(aq)+Cu(s)
Here, ironis more reactive than copper. So, itdisplaces copperfrom its solution.

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