METALS AND NON METALS 10

PRACTICE PAPER

Class X
SUB: CHEMISTRY (2020)
                        METALS AND NONMETALS                     ___________________________________________________

I. Very short answer type questions: 

1. What happens when calcium reacts with water?
2. Generally, metals react with acids to give salt and hydrogen gas. Which acids do not give hydrogen gas on reacting with metals?
3. Write two metals that exist in their native nature.
4. Write a metal that is refined by electrolytic refining.
5. Write the metal which is liquid in room temperature and a non-metal which is lustrous.
6. Write the name of three metal by which silver metal can be displaced from its salt solution.
7. The electronic configuration of three elements X,Y and Z are X - 2,8; Y - 2,8,7 and Z - 2,8,2. which are metal, nonmetal and inert in nature?
8. Write two amphoteric oxides.
9. Write a non-metal which conduct electricity.
10. Write the name of a non-metal which is liquid.  
11. Why do silver articles become black after some time when exposed to air?
12. What happens when ZnCO₃ is heated in the absence of air? Give the relevant equations.
13. Why silver articles become black on prolonged exposure to air?
14. Define alloy.
15. Write the name of metals in stainless steel.
16. Which gas is usually liberated when an acid reacts with a metal?
17. Give an example of a metal which is the best conductor of heat.
18. State two physical properties of gold which are of extreme use of Jewelers.
19.  Name one metal and one nonmetal which exist in the liquid state at room temperature.
20. Make a distinction between metal and non-metal with respect to the nature of their oxide.
21. Name the metal which reacts with a very dilute HNO₃ to evolved hydrogen gas.
22. Name the metal which has a very low melting point and can melt with the heat of your palm.
23. In the formation of a compound X and Y, atom X gives one electron to an atom of Y. What is the nature of the bond in X and Y?
24. An element X forms an oxide which turns red litmus blue. Identify whether X is a metal or non-metal.
25. What is meant by metallurgy?
26. Define roasting and calcination.
27. Name a nonmetal that is lustrous and a metal which is non-lustrous.
28. Why do we apply paint on iron articles?
29. What is the thermite reaction?
30. Why aluminum and copper metals used for making cooking vessels?    
31. Write chemical equations that show aluminum oxide react with acid as well as a base.
32. What is  Aqua regia ?.
33. Define (a) Mineral (b) Ore and (c) Gangue. 
34. What is galvanization?

I. Short answer type questions: 

1. Why do ionic compounds have high melting points? State two reasons.
2. What is meant by corrosion?
3. Write two observations that you will make when an iron nail is kept in an aqueous solution of Copper Sulphate. Write the chemical equations for this reaction.
4. Give reasons for the following:
   (a) Why do aluminum sheets not corrode easily?
   (b) Why is copper vessel covered with a green coating in the rainy season?
5. Name two metals that start floating after sometime when immersed in water and explain why they do so?
6. Explain the steps for the extraction of copper from its sulphide ore. Write the balanced equations involved in this process.
7. Define amphoteric oxides. Give two examples of such oxides.
8. Define ionic compounds. Are ionic compounds conduct electricity only in the molten state, not in solid-state? Why?
9. Explain why calcium metal after reacting with water starts floating on its surface. Write the chemical equation for the reaction.
10. Write symbols of cation and anion present in MgO. Why ionic compounds are solid?
11. What is meant by the refining of metals in the electrolytic refining of metal M. Name the cathode anode and the electrolyte?
12. Describe briefly the method to obtain Mercury from cinnabar. Write the chemical equation for the reaction involved in the process.
13. Give reasons:
    (i) Sodium metal is stored under Kerosene oil.
    (ii) In spite of being highly reactive aluminum is still used for making vessel utensils.
14. Give reasons for the following:
    (i) School Bells are made up of metals.
    (ii) Electrical wires are made up of copper.
15. How will you show that iron is more reactive than copper? 
16. Out of the two metals P and Q, P is less reactive than Q. Suggest an activity to arrange this metal in the order of their decreasing reactivity. Support your answer with a suitable chemical equation.
17. What do you mean by amalgam?
18. Give the composition of brass and bronze. 
19. What are the constituents of solder alloy? Which property of solders makes it suitable for welding electrical wires?
20. Differentiate the roasting and calcination process. Giving one example of each.
21. Zinc is a metal found in the middle of the activity series of metals. In nature, It is found as a carbonate or ZnCO₃. Mention the steps carried out for its extraction from the ore. Support with equations.
22. Explain the formation of an ionic compound CaO with electron dot structure. The atomic number of calcium and oxygen are 20 and 8 respectively.
23. All Ores are minerals but all minerals are not ores. Justify the statement.
24. Explain roasting with the help of reaction.

III Long answer type questions: 

1. How is copper extracted from its ore? Explain the process of refining copper with the help of a diagram. 
2. Name the following:
   (i) A metal that is preserved in kerosene.
   (ii) Lustrous colored nonmetal.
   (iii) A metal that is melt while kept on the palm.
   (iv) A metal which is a poor conductor of heat.
3. Give reasons for the following:
   (i) Ionic compounds have a high melting point and boiling point
   (ii) Ionic compounds conduct electricity in a molten state.
   (iii) Ionic compounds are solid at room temperature and are somewhat hard.
4. Give reasons for the following:
   (a) Metals usually do not liberate hydrogen from nitric acid.
   (b) Oxides of highly reactive metals cannot be reduced by coke.
5. Illustrate the formation of bond:
   (i) Sodium chloride
   (ii) Magnesium chloride
   (iii) Identify the ions present in this compound.
6. Aluminum occurs in combined state whereas gold is found in the free state in nature. Why?
7. Define alloy. List the properties of alloys that make them useful over pure metal. Explain this fact with suitable examples.
8. Which method will you use to reduce the following?
   (i) Oxides of less reactive metals.
   (ii) Oxides of moderately reactive metals.
   (iii) Oxides are highly reactive metals.
   (iv) Explain by giving a suitable example.
9. Write a balanced equation for the reaction of
   (i) Aluminum when heated in air.
   (ii) Iron with steam.
   (iii) Calcium with water.
   Name the product obtained. 
10. Describe an activity to show that rusting of iron, works in the presence of air and moisture.
11. A metal X left in moist air for a longer time loses it shiny brown surface and gains a green coat. Why has this happened? Name and give the chemical formula of this given colored compound and identify the metal. Least two ways to prevent this process.
12. By giving one example each explain the method of obtaining the following metals from their compounds.
    (i) Metal A which is low in the activity series
    (ii) Metal B which is in the middle of the activity series
    (iii) Metal C which is towards the top of the activity series.
13. Write a balanced chemical equation for the following reaction:
    (i) When copper is heated in air
    (ii) When Aluminum is heated in air
    (iii) When Aluminum oxide reacts with Sodium Hydroxide.
14. Compare the properties of a typical metal and a nonmetal on the basis of the following:
    (i) Nature of the oxides formed by them.
    (ii) Conductivity.
15. In a thermite reaction compound of iron reacts with a metal.
    (i) Name the metal used in this reaction.
    (ii) After completion of this reaction a metal is obtained in the molten state. Identify the metal. Represent these reactions in the form of a balanced chemical equation. Mention the most common use of this reaction.
16. Zn is the metal that lies in the middle of the activity series, these metals are extracted from its sulphide ore. Outline the steps involved in the process of extraction of zinc metal with the help of the balanced chemical equation for each stapes.
17. Explain how a metal which is high up in the reactivity series obtained from its compound? Give equations also.
18. An aluminum can be used to store ferrous sulphate solution. It is observed that in few days holes appear in the can. Explain the observation and write chemical equations to support your answer. 

                                                   

Chapter 1 - Chemical Reactions and  Equations	Quick View	Questions with Solutions
Chapter 2 - Acid, Bases and Salt	Quick View	Questions with Solutions
Chapter 3 - Metal and Non-metals	Quick View	Questions with Solutions
Chapter 4 - Carbon and it's compound	Quick View	Questions with Solutions
Chapter 5 - Periodic Classification of Elements	Quick View	Questions with Solutions
Chapter 6 - Life Processes	Quick View	Questions with Solutions
Chapter 7 - Control and Co-ordination	Quick View	Questions with Solutions
Chapter 8 - How do Organisms Reproduce?	Quick View	Questions with Solutions
Chapter 9 -  Health and Heredity	Quick View
Chapter 10 -  Reflection and Refraction	Quick View	Questions with Solutions
Chapter 11 -  Human Eye Colourful World	Quick View	Questions with Solutions
Chapter 12 -  Electricity	Quick View	Questions with Solutions
Chapter 13 -  Magnetic Effect of Electric Current	Quick View	Questions with Solutions
Chapter 14 -  Sources of Energy	Quick View
Chapter 15  - Our Environment	Quick View
Chapter 16 - Management of  Natural  Resources	Quick View