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) PRQS 1 1 1 (b) PRSQ 1 1 1 (c) PQRS 1 1 1 (d) SQRP 1 1 1 Sol : www.cbse.site/sc/cm114 116. Which metal is indicated by R? (a) Mg (b) Al (c) Fe (d) Cu Sol : www.cbse.site/sc/cm114 117. Which metal can displace R from its salt solution? (a) P (b) Q (c) S (d) Both (b) and (c) Sol : www.cbse.site/sc/cm114 118. Which metal is likely to be displaced by R? (a) P (b) Q (c) R (d) S Sol : www.cbse.site/sc/cm114 119. Which one of the following metals do not react with cold as well as hot water? (a) Fe (b) Na (c) Ca (d) Mg​

Answer 1

Answer:

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Answer 2

Answer:

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