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Metals and non metals-Important Questions & Preparation Tips

In this article you will get the clue that from where and how the questions are being framed from the chapter Metals and non metals. Our experts have full confidence that you will not lose any of the questions in the board exam as well as in home exams from this chapter if you will keep the following terms / question in your mind while studying

May 18, 2013 17:00 IST
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In this article you will get the clue that from where and how the questions are being framed from the chapter Metals and non metals. Our experts have full confidence that you will not lose any of the questions in the board exam as well as in home exams from this chapter if you will keep the following terms / question in your mind while studying

  • What does malleable, ductile and breaking mean?
  • Name the metal which is liquid in nature
  • Metals are called electropositive elements. Why?
  • Name some alloy
  • Name the most abundant metal in the earth crust
  • Which is the most important non metal without which life would have not been possible?
  • Explain why metals are good conductors of heat?
  • Why do metal loses its shine and brightness?
  • Why are metals used for making bells?
  • Properties of non metal and metals
  • What are the exceptions in physical properties of metal and non metals
  • Potassium metal stored under kerosene oil. Why?
  • What is the basic nature of metal oxide?
  • What are amphoteric oxides? Give examples
  • Why do aluminum metal does not react with water
  • How metal displace hydrogen with oxygen
  • How metal displaces hydrogen from dilute acids
  • Why is nitrogen gas not evolved when metals reacts with dilute nitric acid?
  • What is aqua regia?
  • Between copper and sodium, which metal is more reactive? Explain with reason.
  • Why some metals do are more reactive while others are les reactive?
  • What will happen if a metal is below hydrogen in the activity series?
  • In a solution of silver nitrate, a copper plate was dipped. After sometime, silver from the solution was deposited on the copper plate. Which metal is more reactive- copper or silver?
  • Which of the following will give displacement reaction?

                            NaCl solution and copper metal

                            MgCl2 solution and aluminum metal

                            FeSO4 solution and silver metal

                            AgNO3 solution and copper metal

  • Why is copper used to make wires?
  • TNT and its use
  • Complete  and the balance equation

                            Na + O2------>

                            Na2O + H2O------>

                            Fe(s) + H2O (g)------>

                            Cu(NO3)2 + Zn(s)------>

  • Metal A burns in air, on heating, to form an oxide A2O3, where as another metal B burns in air only on strong heating to form an oxide BO. The two oxides A2O3 and BO can react with hydrochloric acid as well as sodium hydroxide solution to form the corresponding salts and water.

                            What is the nature of oxide A2O3

                            What is the nature of oxide BO

                            Name one metal like A

                            Name one metal like B

  • How does an atom can achieve the inert gas electron arrangement?
  • What are the types of chemical bonds?
  • Electron dot structure of fluorine, chlorine, oxygen, sulphur  and nitrogen
  • Covalent bond and its type
  • An element reacts with oxygen to form an oxide which dissolves in dilute hydrochloric acid. The oxide formed also turns a solution of red litmus blue. Is the element a metal or a non metal? Explain.
  • Explain the formation of

                             Chlorine molecule

                             Hydrogen molecule

                             Hydrogen chlorine molecule

                             Carbon tetrachloride molecule

                             Water molecule

                             Ammonia molecule

  • Explain the formation of

                             Oxygen molecule

                             Carbon dioxide molecule

                             Ethane molecule

                             Nitrogen molecule

                             Ethyne molecule

  • Explain with the help of diagram that sodium chloride conducts electricity?
  • What are the properties of covalent compounds?
  • Covalent compounds have low melting and boiling points. What are the exceptions?
  • Difference between ionic compounds and covalent compounds?
  • An element A has 4 electrons in the outermost shell of its atom and combines with another element B having 7 electrons in the outermost shell of its atom. The compound formed does not conduct electricity. What is the nature of the chemical bond in the compound? Give the electron dot structure of its molecule.
  • Give the formulae of chlorides of the elements A and B having atomic number of 6 and 11 respectively? Will the properties of the two chlorides be similar or different? Explain?
  • What do we call those particles which have more or less electrons than normal atoms?
  • What type of bonding would you expect between the following pair of elements?

                              Calcium and oxygen

                              Carbon and chlorine

                              Hydrogen and chlorine

  • Define mineral and ore?
  • Explain the statement- all the ores are minerals but all the minerals are not ore?
  • Explain the extraction of metals in detail?
  • Explain the process of electrolytic reduction?
  • Define calcinations, roasting and termite reaction
  • Explain with the help of diagram the electrolysis refining of copper?
  • An ore gives carbon dioxide on treatment with a dilute acid? What steps will you take to convert such a concentrated ore into free metals?
  • Explain corrosion and rusting?
  • Conditions necessary for corrosion of iron?
  • How can we prevent rusting?
  • Explain the process of galvanization?
  • What is amalgam?
  • Give reason why copper is used to make hot water tanks but steel is not?
  • Name two metals which occur in free state and as well as in combined state?
  • Name one ore of manganese. Which compound of manganese is preset in this ore? Also write its chemical formula?
  • A zinc ore on heating in air forms sulphur dioxide. Describe briefly any two stages involved in the conversion of this concentrated ore into zinc metal.
  • Name one metal which is extracted from hematite ore.
  • Name of the process by which zinc blende ore can be converted into zinc oxide
  • Name of the metal which can be extracted from pyrolusite ore
  • Name the combination of two metals which form brass alloy
  • Name a pair of metals exists in their native state in nature
  • Name the metal extract from cinnabar ore.
  • Summary of the various steps involved in the extraction of pure metals from their ores
  • What is anode mud? Name the two metals which can be recovered from anode mud?
  • Identify the methods of extraction of a metal from its concentration ore and vice versa

Metals

Methods

K, Na, Ca, Mg, Al

???

???

Reduction of oxide with carbon

Cu, Hg

???

  • A metal which exists as a liquid at room temperature is obtained by heating its sulphide ore in the presence of air
  • Name the metal and write its chemical symbol
  • Write the name and formula of sulphuric ore
  • Give the equations of chemical reactions involved in the production of metal from its sulphide ore.
  • Name a common device in which this metal is used
  • Can this metal displace copper from sulphate solution? Why?
  • How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?
  • What is meant by 22 carat gold? Name the metals which are usually alloyed with gold to make it harder.
  • Explain how, a reduction reaction of aluminum can be used for welding cracked machine parts of iron. Write a chemical equation for the reaction involve.
  • In the formation of a compound XY2 atom X gives one electron to each Y atom. What is the nature of bond in XY2? Give two properties of XY2

There are some sample questios given below :

1. An element reacts with oxygen to give a compound with high melting point. This compound is also soluble in water. The element is likely to be
a. Calcium
b. Carbon
c. Silicon
d. Iron

2. which of the following pairs will give displacement reaction
a. NaCl solution and copper metal
b. MgCl2 solution and aluminium metal
c. FeSO4 solution and silver metal
d. AgNO3 solution and copper meta
 
3. An iron nail is dipped in copper sulphate solution. It is observed that
a. The colour 0f the solution remain unchanged .
b. The colour 0f the solution becomes red .
c. The colour 0f the solution turns to light green .
d. None of these
 
4. Moist air is the combination of
a. H2O+CO2+O2
b. H2O+ CO+O2
c. H2O+CO2+H2
d. H2O+O2+H2
 
5. Metal A when dipped in solution of salt of metal B ,then metal B is displaced . this shows that
a. Metal A is more reactive than metal B
b. Metal B is more reactive than metal A
c. Metal A and metal B are equally reactive
d. None of these

6. Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?
a. Amalgam
b. Brass
c. Bronze
d. Steel

7. 2 mL each of concentrated HC1, HN03 and a mixture of concentrated HC1 and concentrated HN03 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
a. Al
b. Au
c. Cu
d. Ag

8. An electrolytic cell consists of
i. positively charged cathode
ii. negatively charged anode
iii. positively charged anode
iv. negatively charged cathode
a. (i) and (ii)
b. (iii) and (iv)
c. (i) and (iii)
d. (ii) and (iv)
 
9. An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following
a. Mg
b. Na
c. P
d. Ca

10.  What happens when calcium is treated with water ?
i. It does not react with water
ii. It reacts violently with water
iii. It reacts less violently with water
iv. Bubbles of hydrogen gas formed stick to the surface of calcium
a. (i) and (iv)
b. (ii) and (iii)
c. (i) and (ii)
d. (iii) and (iv)

11. Which of the following are not ionic compounds ?
i. KCl
ii. HCl
iii. CCl4
iv. NaCl
a. (i) and (ii)
b. (ii) and (iii)
c. (iii) and (iv)
d. (i) and (iii)

12. Which of the following metals exist in their native state in nature ?
i. Cu
ii. Au
iii. Zn
iv. Ag
a. (i) and (ii)
b. (ii) and (iii)
c. (ii) and (iv)
d. (iii) and (iv)

13. Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining ?         
i. Au
ii. Cu
iii. Na
iv. K
a. (i) and (ii)
b. (i) and (iii)
c. (ii) and (iii)
d. (iii) and (iv)

14. The most abundant element in the universe is
a. Hydrogen
b. Helium
c. Carbon
d. Oxygen

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