Class 10 Exam > Class 10 Notes > Extra Documents, Videos & Tests for Class 10 > Solutions of Metals and Non-metals (Page No - 195) - Chemistry Lakhmir Singh, Class 10
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Question 92:
An element A which is a part of common salt and kept under kerosene reacts with another element B of atomic number 17 to give a product C. When an aqueous solution of product C is electrolysed then a compound D is formed and two gases are liberated.
(a) What are A and B ?
(b) Identify C and D.
(c) What will be the action of C on litmus solution ? Why ?
(d) State whether element B is a solid, liquid or gas at room temperature.
(e) Write formula of the compound formed when element B reacts with an element E having atomic number 5.
Solution :
(a) A is sodium and B is chlo rine
(b) C is sodium chloride and D is sodium hydroxide
(c) C will have no effect on litmus solution since it is neutral in nature.
(d) B is a gas at room temperature.
(e) EB3
Question 93:
A metal which exists as a liquid at room temperature is obtained by heating its sulphide ore in the presence of air.
(a) Name the metal and write its chemical symbol.
(b) Write the name and formula of the sulphide ore.
(c) Give the equations of chemical reactions involved in the production of metal from its sulphide ore.
(d) Name a common device in which this metal is used.
(e) Can this metal displace copper from copper sulphate solution ? Why ?
Solution :
(a) Mercury, Hg
(b) Cinnabar, HgS
(c)
(d) Thermometer
(e) No; Because it is less reactive than copper.
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FAQs on Solutions of Metals and Non-metals (Page No - 195) - Chemistry Lakhmir Singh, Class 10 - Extra Documents, Videos & Tests for Class 10
| 1. What are the properties of metals? |  |
Ans. Metals have several properties such as high electrical and thermal conductivity, malleability, ductility, and shiny appearance. They also tend to form positive ions when they undergo chemical reactions.
| 2. What are the properties of non-metals? | |
Ans. Non-metals have properties that are opposite to those of metals. They are generally poor conductors of heat and electricity, brittle, and have low melting and boiling points. Non-metals tend to gain electrons during chemical reactions to form negative ions.
| 3. Give examples of metals and non-metals. | |
Ans. Examples of metals include iron, copper, aluminum, gold, and silver. Examples of non-metals include carbon, sulfur, oxygen, nitrogen, and chlorine.
| 4. How do metals and non-metals react with oxygen? | |
Ans. Metals react with oxygen to form metal oxides. For example, iron reacts with oxygen to form iron oxide (rust). Non-metals, on the other hand, react with oxygen to form non-metal oxides. For example, sulfur reacts with oxygen to form sulfur dioxide.
| 5. How are metals and non-metals classified in the periodic table? | |
Ans. Metals are located on the left side of the periodic table, while non-metals are found on the right side. The elements in the middle of the periodic table are known as metalloids, which exhibit properties of both metals and non-metals.
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