Question

Which one of the glven metals dous not react with cold as well as hot water? (A) Na (B) Ca (C) Mg (D) Ag​

Answer 1

Answer:

Ag because it is least reactive metal

Answer 2

Answer:

(D) Ag (silver)

Explanation:

Step 1: The reaction of metals with cold or hot water depends on the reactivity of the metals.

Step 2:

∙ Reactive metals like sodium, potassium, calcium, etc. react with cold or hot water.

∙ Moderately reactive metals like magnesium react with hot water.

∙ Less reactive metals do not react with cold or hot water but react with steam.

∙ Least reactive metals like gold, silver, etc. do not react at all.

Step 3: Less reactive metals like iron react with steam to form an oxide and release hydrogen gas.

step 4 : Metals such as lead, copper, silver and gold do not react with water at all.

so answer is (D)