Question

Assertion. The arrangement of metals in order of decreasing reactivities is called reactivity series.


Reason: Metals at the top of series are least reactive and metals at the bottom are most reactive.


Both A and R are true and R is the correct explantation of A

B) Both A and R are true and R is not the correct explanation of A

C) A is true but R is false

D) A is false but R is true​

Answer 1

Answer:

c A is true but R is false

Explanation:

because metals at top are most reactive

Answer 2

Option C) is correct

Assertion sates that the arrangement of metals in order of decreasing reactivities is called reactivity series.

• An activity or reactivity series is a list of elements ranked in order of comparative reactivity formed after displacement tests.
• The maximum active metals are at the top of the table and least reactive at the bottommost of the table.
• The data provided by the reactivity series can be used to foresee whether a metal can displace each other in a single displacement reaction.
• It can also be used to obtain data on the reactivity of metals towards water and acids.

Reason sates that metals at the top of series are least reactive and metals at the bottom are most reactive.

• The metal reactivity series is a list of metals organized in the order of their decreasing activities.

• The metals at the top of series are most reactive and metals at the bottom are least reactive.

• The metals at the topmost of the series (K, Na, Ca, Mg and Al) are so reactive that they are not found in nature as free elements.
• It is hard to separate them from their mixtures and extract.
• The metals at the lowest of the activity series are the least reactive.
• Some of these metals are seen in the earth’s crust in their free state.
• For example, Gold, Platinum. So, it becomes relatively easier to extract such least reactive elements.

So, the assertion is true while the reason is false.

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