8th Class Science Materials : Metals and Non-metals Question Bank

done Materials Total Questions - 40

• question_answer1)
  Natural polymer present in wood pulp is:
  A)
  Rayon               done clear
  B)
  Cellulose done clear
  C)
  Chlorophyll                    done clear
  D)
  Silk done clear
  E)
  None of these done clear
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• question_answer2)
  Viscose is formed by dissolving:
  A)
  Wood pulp into a solution of hydrochloric acid. done clear
  B)
  Wood pulp into sodium hydroxide solution. done clear
  C)
  Wood pulp into sulphuric acid solution. done clear
  D)
  Polyester into sodium hydroxide solution. done clear
  E)
  None of these done clear
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• question_answer3)
  Which one of the following is correct about nylon fibres?
  A)
  Nylon fibres are very strong. done clear
  B)
  NyIon fibres absorb very little water. done clear
  C)
  NyIon fibres are fairly elastic. done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer4)
  Which one of the following is a thermosetting plastic?
  A)
  Teflon               done clear
  B)
  Melamine done clear
  C)
  PVC                              done clear
  D)
  Polyethene done clear
  E)
  None of these done clear
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• question_answer5)
  Which one of the following is also known as polytetrafluoroethylene?
  A)
  Bakelite             done clear
  B)
  Perspex done clear
  C)
  Teflon   done clear
  D)
  Melamine done clear
  E)
  None of these done clear
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• question_answer6)
  Plastic buckets are preferred over iron buckets as they are:
  A)
  Light weight done clear
  B)
  Non-reactive done clear
  C)
  Resistant to corrosion done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer7)
  Which one of the following is a property of plastics?
  A)
  Good Conductors of electricity.    done clear
  B)
  Good conductors of heat. done clear
  C)
  Insoluble in water done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer8)
  The most common form of ___ is sand.
  A)
  Carbon              done clear
  B)
  Nitrogen done clear
  C)
  Silica     done clear
  D)
  Sodium done clear
  E)
  None of these done clear
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• question_answer9)
   _____ is used as a substitute for glass for making windows in aeroplanes.
  A)
  Melamine                       done clear
  B)
  PVC done clear
  C)
  Perspex done clear
  D)
  Polyethene done clear
  E)
  None of these done clear
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• question_answer10)
  Nylon is used to make ropes because:
  A)
  It is wrinkle resistant.       done clear
  B)
  It is easy to wash. done clear
  C)
  It is lustrous in appearance. done clear
  D)
  It is very strong.    done clear
  E)
    None of these       done clear
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• question_answer11)
      Which one of the following will be flattened on beating with a hammer?
  A)
  Coal                              done clear
  B)
  Sulphur done clear
  C)
  Zinc                  done clear
  D)
  Iodine done clear
  E)
  None of these done clear
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• question_answer12)
  Which one of the following is a metal?
  A)
  A graphite pencil lead done clear
  B)
  A diamond ring done clear
  C)
  A Carbon rod done clear
  D)
  A silver coin done clear
  E)
  None of these    done clear
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• question_answer13)
  Which one of the following is a non-metal?
  A)
  Chlorine             done clear
  B)
  Hydrogen done clear
  C)
  Copper              done clear
  D)
  Both [a] and [b] done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer14)
  Sulphur burns in air to make____.
  A)
  Basic oxide                    done clear
  B)
  Acidic oxide done clear
  C)
  Neutral oxide      done clear
  D)
         Acidic nitrate done clear
  E)
  None of these done clear
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• question_answer15)
  Which one of the following statements is incorrect?
  A)
  Sodium reacts with water to form sodium hydroxide. done clear
  B)
  Sulphur reacts with water to form sulphuric acid. done clear
  C)
  Zinc reacts with steam to produce hydrogen gas. done clear
  D)
  Magnesium reacts with steam to give magnesium oxide. done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer16)
  Which one of the following will not react with dilute hydrochloric acid?
  A)
  Aluminum                      done clear
  B)
  Sodium done clear
  C)
  Iron                               done clear
  D)
  Silver done clear
  E)
  None of these done clear
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• question_answer17)
  Rahul wants to gift a glass ? painting to Ankita. The packaging of glass painting should be made of:
  A)
  Teflon               done clear
  B)
  PVC done clear
  C)
  Polystyrene        done clear
  D)
  Melamine done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer18)
  When acidic oxide of sulphur reacts with water it forms:
  A)
  Nitric acid                      done clear
  B)
  Sulphuric acid done clear
  C)
  Sulphurous done clear
  D)
  Sulphur dioxide done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer19)
  Choose the correct sequence of the metals in the increasing order of their reactivity.
  A)
  Cu < Pb < Ag < Na < K done clear
  B)
  Ag < Pb < Cu < Na < K done clear
  C)
  Ag < Cu < Pb < K < Na done clear
  D)
  Ag < Cu < Pb < Na < K done clear
  E)
  None of these done clear
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• question_answer20)
  The gas produced when a metal reacts with dilute hydrochloric acid and burnt by producing a popping sound.
  A)
  Oxygen             done clear
  B)
  Carbon dioxide done clear
  C)
  Hydrogen           done clear
  D)
  Nitrogen done clear
  E)
  None of these done clear
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• question_answer21)
  The substance that will be flattened on beating with a hammer is:
  A)
  Crystal of iodine done clear
  B)
  Lump of sulphur done clear
  C)
  Piece of coal                  done clear
  D)
  Zinc granule done clear
  E)
  None of these done clear
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• question_answer22)
  Which one of the following groups is completely made of chemicals?
  A)
  Silk, Rayon, PVC done clear
  B)
  Nylon, Wool, Acrylic done clear
  C)
  Acrylic, Polyethene, Teflon done clear
  D)
  PVC, Silk, Nylon done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer23)
  Which two fibres combine to form terrycot?
  A)
  Nylon and Rayon done clear
  B)
  Terylene and Terene done clear
  C)
  Terylene and cotton        done clear
  D)
  Acrylic and cotton done clear
  E)
  None of these done clear
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• question_answer24)
  Main source of man-made plastics is:
  A)
  Biogas               done clear
  B)
  Crude oil done clear
  C)
  Vegetable fibre done clear
  D)
         All the above done clear
  E)
  None of these done clear
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• question_answer25)
  Cords of electrical appliances and cables have a plastic coating because plastics are:
  A)
  Insoluble in water.           done clear
  B)
  Poor conductors of electricity. done clear
  C)
  Heavy weight. done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer26)
  Which of the following is a type of polyester?
  A)
  Terylene            done clear
  B)
  Terene done clear
  C)
  Dacron              done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer27)
  Rust is a/an:
  A)
  Acidic oxide                   done clear
  B)
  Basic oxide done clear
  C)
  Neutral oxide      done clear
  D)
         Basic nitrate done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer28)
  In which of the following chemical reactions hydrogen gas will not produce?
  A)
  When sodium reacts with water. done clear
  B)
  When zinc reacts with dilute hydrochloric acid. done clear
  C)
  When copper reacts with dilute sulphuric acid. done clear
  D)
  When aluminum reacts with sodium hydroxide. done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer29)
  Which one of the following can displace magnesium from magnesium sulphate solution?
  A)
  Aluminium                     done clear
  B)
  Zinc done clear
  C)
  Iron                               done clear
  D)
  Copper done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer30)
  Which one of the following is used for making insulation for electric wires?
  A)
  Polythene                      done clear
  B)
  PVC done clear
  C)
  Teflon                   done clear
  D)
       Melamine done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer31)
  Which one of the following statements is correct?

  (i) A more reactive metal can displace a less reactive metal from its salt solution.

  (ii) Copper can displace magnesium from its salt solution.

  (iii) Magnesium can displace copper from its salt solution,

  (iv) A less reactive metal can displace a more reactive metal from its salt solution.

  A)
  (i) and (ii)                       done clear
  B)
  (ii) and (iv) done clear
  C)
  (i) and (iii)          done clear
  D)
  (iii) and (iv) done clear
  E)
  None of these done clear
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• question_answer32)
   ____: hard non-metal : : _____ : soft metal.
  A)
  Graphite, Copper            done clear
  B)
  Diamond, Potassium done clear
  C)
  Diamond, Sulphur done clear
  D)
  Enamel, Sodium done clear
  E)
  None of these done clear
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• question_answer33)
  Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
  A)
  Iron                               done clear
  B)
  Sodium done clear
  C)
  Gold                             done clear
  D)
  Magnesium done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer34)
  Which one of the chemical reactions is incorrect?

  (i) \[Fe\,S{{O}_{4}}+Zn\to Zn\,S{{O}_{4}}+Fe\]

  (ii) \[Zn\,S{{O}_{4}}+Fe\to Fe\,S{{O}_{4}}+Zn\]

  (iii) \[2Au+2HCl\to 2Au\,\,Cl+{{H}_{2}}\]

  (iv) \[Mg+Cu\,S{{O}_{4}}\to Mg\,S{{O}_{4}}+Cu\]

  A)
  (i) and (ii)                       done clear
  B)
  (ii) and (iii) done clear
  C)
  (iii) and (iv)                    done clear
  D)
  (i) and (iv) done clear
  E)
  None of these done clear
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• question_answer35)
  Oxides of non-metals:
  A)
  Turn Red litmus to blue. done clear
  B)
  Turn Blue litmus to red. done clear
  C)
  Brings no change to the litmus paper. done clear
  D)
  Turn lime water milky. done clear
  E)
  None of these done clear
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• question_answer36)
  A non-metal which catches fire on being exposed to air is:
  A)
  Mercury             done clear
  B)
  Magnesium done clear
  C)
  Calcium             done clear
  D)
  Phosphorus done clear
  E)
  None of these done clear
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• question_answer37)
  A non-metal which is a good conductor of electricity.
  A)
  Hydrogen                       done clear
  B)
  Sulphur done clear
  C)
  Graphite            done clear
  D)
  Phosphorus done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer38)
  Aluminum can displace __ from its salt solution.
  A)
  Magnesium                    done clear
  B)
  Sodium done clear
  C)
  Calcium             done clear
  D)
  Copper done clear
  E)
  None of these done clear
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• question_answer39)
  How well the substance can be hammered into sheets describes its:
  A)
  Ductility             done clear
  B)
  Luster done clear
  C)
  Malleability        done clear
  D)
  Conductivity done clear
  E)
  None of these done clear
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• question_answer40)
  Which of the following metals reacts with cold water vigorously?
  A)
  Magnesium                    done clear
  B)
  Silver done clear
  C)
  Sodium done clear
  D)
  Sulphur done clear
  E)
  None of these done clear
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