Question

In chemistry a metal is an element that readily forms positive ions and has metallic bonds. A metal is a material that when freshly prepared, polished or fractured, shows a lustrous appearance and conducts electricity and heat relatively well. Metals are typically malleable or ductile. The table shows the reaction of different metals with water.

Metal Reaction with water Reaction with steam P None Mild Q Mild Vigorous R Very slow Vigorous S Vigorous Violent

115. The current order of increasing reactivity of metals is:
(a) P<R<Q<S
(b) P<R<S<Q
(c) P<Q<R<S
(d) S<Q<R<P​

Answer 1

Answer:

b is the correct option

Explanation:

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Answer 2

The increasing order of the reactivity of metals is P<R<Q<S. (Option a)

• The reactivity of metals is defined as per the reaction of the metal with steam and water.

• If the metal reacts vigorously with normal water, it is highly reactive as the metal S.
• If the metal reacts mildly with water and vigorously with steam, the metal is less reactive as compared to S, i.e. Q.
• The metal R reacted very slow with water but vigorously with steam thus it is next in the reactivity series.
• The metal P does not react with water and mildly with steam thus it is the lowest as compared to other metals.