Metals and Non-Metals-Important Questions

1.  A metal ‘X’ loses two electrons and a non-metal ‘Y’ gains one electron. Show the electron dot structure of compound formed between them. Is ionic or covalent? Does it have high melting point or low? Will it conduct electricity in solid state or in aqueous solution and why? Will it be soluble in water?

2.  A student was given Mn, Zn, Fe and Cu metals. Identify which of them

      (a) will not displace H2 from dil. HCl.

      (b) will react only with steam to give H2(g).

      (c) Will give H2 with 5% HNO3.

      Write the chemical reactions involved.

3.  Compound X and aluminium are used to join railway tracks.

      (a) Identify the compound X.

      (b) Name the reaction.

      (c) Write down its reaction.

4.  Samples of five metals ‘A’, ‘B’, ‘C’, ‘D’ and ‘E’ were taken and added to the following solution one

by one. The results obtained have been tabulated as follows.

Metal FeSO4 CuSO4 ZnSO4 AgNO3 Al2(SO4)3 MgSO4

A No reaction Displacement No reaction Displacement No reaction No reaction

B Displacement Displacement No reaction Displacement No reaction No reaction

C No reaction No reaction No reaction Displacement No reaction No reaction

D No reaction No reaction No reaction No reaction No reaction No reaction

E Displacement Displacement Displacement Displacement No reaction No reaction

Use the above table to answer the following questions about the given metals.

(a) Which of them is most reactive and why?

(b) What would you observe if ‘B’ is added to CuSO4?

(c) Arrange ‘A’, ‘B’, ‘C’, ‘D’ and ‘E’ in the increasing order of reactivity.

(d) Container of which metal can store zinc sulphate and silver nitrate solution?

(e) Which of the above solution(s) can be stored in a container made of any of these metals and

why?

5.  A metal A, which is used in thermite process, when heated with oxygen gives an oxide B, which is

amphoteric in nature? Identify A and B. Write down the reactions of oxide B with HC1 and NaOH.

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6.  A non-metal A is an important constituent of our food and forms two oxides B and C. Oxide B is

toxic whereas C causes global warming.

(a) Identify A, B and C.

(b) To which group of periodic table does A belong?

7.  An element A reacts with water to form a compound B which is used in white washing. The compound

B on heating forms an oxide which on treatment with water gives back B. Identify A, B and C and

give the reactions involved.

8.  A non-metal A which is the largest constituent of air, when heated with H2 in 1 : 3 ratio in the presence of catalyst (Fe) gives a gas B. On heating with O2, it gives an oxide C. If this oxide is passed into water in the presence of air, it gives and acid D which act as a strong oxidising agent.

(a) Identify A, B, C and D.

(b) To which group of periodic table does this non-metal belong?

9.  An element A burns with golden flame in air. It reacts with another element B, atomic number 17 to

give a product C. An aqueous solution of product C on electrolysis gives a compound D and

liberates hydrogen. Identify A, B, C and D. Also write down the equations for the reactions involved.