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

done Metals and Non Metals Summative Objective Problems Total Questions - 20

• question_answer1)
  The non-metal which exist in liquid state at room temperature is:
  A)
   Diamond             done clear
  B)
   Graphite            done clear
  C)
   Carbon                done clear
  D)
   Bromine done clear
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• question_answer2)
  State true or false: (P) Non metals have many different colours. (Q) Nonmetals are less dense and have low melting and boiling points. (R) Non metals are sonorous.
  A)

  (P)	(Q)	(R)
  False	false	true

  done clear
  B)

  (P)	(Q)	(R)
  False	true	true

  done clear
  C)

  (P)	(Q)	(R)
  True	true	false

  done clear
  D)

  (P)	(Q)	(R)
  True	false	true

  done clear
  View Solution play_arrow

• question_answer3)
  The non metal that can conduct electricity is:
  A)
   Carbon                                done clear
  B)
   Graphite           done clear
  C)
   Diamond                             done clear
  D)
   None done clear
  View Solution play_arrow

• question_answer4)
  Metals are good conductors of electricity because,
  A)
   They are malleable. done clear
  B)
   They are ductile. done clear
  C)
   They have free electrons in their outermost shell. done clear
  D)
   They show elasticity and plasticity. done clear
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• question_answer5)
  The correct decreasing order of the reactivity of different metals is :
  A)
   \[K>Na>Mg>Ca>Al>Zn\] done clear
  B)
   \[K>Na>Ca>Mg>Al>Zn\] done clear
  C)
   \[K>Na>Ca>Mg>Zn>Al\] done clear
  D)
   \[K>Na>Mg>Ca>Zn>Al\] done clear
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• question_answer6)
  Metals react with mineral acids to form
  A)
   Salt + Water       done clear
  B)
   Salt + Hydrogen    done clear
  C)
   Salt + \[HCl\]                     done clear
  D)
   All done clear
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• question_answer7)
  Metals react with hydrogen (no heating) form
  A)
   Hydrides            done clear
  B)
   Hydroxide done clear
  C)
   Hydrogen metalloids done clear
  D)
   No reaction done clear
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• question_answer8)
  \[X+4{{H}_{2}}O\xrightarrow{{}}Y+Z\] \[X+S\xrightarrow{{}}R\] 'Y? is the magnetic oxide of iron and 'R? is a grey sulphide.
  A)

  X	Y	Z	K
  \[Fe\]	\[F{{e}_{2}}{{O}_{3}}\]	\[{{H}_{2}}\]	\[FeS\]

  done clear
  B)

  X	Y	Z	K
  \[Fe\]	\[F{{e}_{2}}{{O}_{4}}\]	\[{{H}_{2}}\]	\[FeS\]

  done clear
  C)

  X	Y	Z	K
  \[Fe\]	\[F{{e}_{3}}{{O}_{3}}\]	\[{{O}_{2}}\]	\[FeS\]

  done clear
  D)

  X	Y	Z	K
  \[Fe\]	\[F{{e}_{2}}{{O}_{3}}\]	\[{{O}_{2}}\]	\[FeS\]

  done clear
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• question_answer9)
  Most abundunt element upon the earth is _____.
  A)
   Nitrogen             done clear
  B)
   Oxygen done clear
  C)
   Silicon                                  done clear
  D)
   Carbon done clear
  View Solution play_arrow

• question_answer10)
  Chrome tungsten steel is used in making
  A)
   Drilling tool     done clear
  B)
   Ridged wheel done clear
  C)
   Amalgam            done clear
  D)
   Solder done clear
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• question_answer11)
  P: Duralumin is a alloy of Nickel gold Q: Silicon is used in making aeroplane chips R : Amalgam is used for filling cavities in teeth S : Nichrome is an alloy of nickel and chrome
  A)

  (P)	(Q)	(R)	(S)
  False	True	True	False

  done clear
  B)

  (P)	(Q)	(R)	(S)
  True	False	True	False

  done clear
  C)

  (P)	(Q)	(R)	(S)
  False	True	False	True

  done clear
  D)

  (P)	(Q)	(R)	(S)
  True	False	False	True

  done clear
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• question_answer12)
  Common brass is an alloy of
  A)
   Cu and Tin                          done clear
  B)
   Tin and Zinc done clear
  C)
   Copper and zinc               done clear
  D)
   Bronze and lead done clear
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• question_answer13)
  (P) Stain less steel is an alloy of iron and copper    (Q) Ainico can also be called as magnetic steel      (R) German silver is an alloy of silver and nickel (S) Bell metal and gun metal are Iron-carbon alloys. 3
  A)

  (P)	(Q)	(R)	(S)
  False	True	False	False

  done clear
  B)

  (P)	(Q)	(R)	(S)
  False	True	False	False

  done clear
  C)

  (P)	(Q)	(R)	(S)
  False	True	False	True

  done clear
  D)

  (P)	(Q)	(R)	(S)
  True	False	False	True

  done clear
  View Solution play_arrow

• question_answer14)
  (P) German silver is used in decorating sweets      (Q) Ornamental gold is an alloy of gold and silver R) Coins are made up of pure metals             
  A)

  (P)	(Q)	(R)
  False	True	False

  done clear
  B)

  (P)	(Q)	(R)
  True	False	True

  done clear
  C)

  (P)	(Q)	(R)
  False	True	True

  done clear
  D)

  (P)	(Q)	(R)
  True	False	False

  done clear
  View Solution play_arrow

• question_answer15)
  (P) Duralumin - (Al = 95%, Cu = 4%, Mn = 0.5%, Mg=0.5%) (Q) Solder- (Sn = 50% to 60% Pb = 50% to 40%) (R) Brass- (Cu = 60% to 80% Sn = 0% to 40%)
  A)

  (P)	(Q)	(R)
  False	True	False

  done clear
  B)

  (P)	(Q)	(R)
  True	False	True

  done clear
  C)

  (P)	(Q)	(R)
  False	True	False

  done clear
  D)

  (P)	(Q)	(R)
  True	False	False

  done clear
  View Solution play_arrow

• question_answer16)
  Aluminium is good conductor of heat, so it so used in
  A)
   Duralumin          done clear
  B)
   Paint done clear
  C)
   Electric wire       done clear
  D)
   All the above done clear
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• question_answer17)
  Sulphur is used in volcanisation of ____
  A)
   Tyre                      done clear
  B)
   Rubber done clear
  C)
   Polymer                              done clear
  D)
   None done clear
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• question_answer18)
   Painting keeps away __ and __ from steel structures and prevents rusting of it
  A)
   Oxides and chlorides done clear
  B)
   Air and moisture done clear
  C)
   Nitrogen and Oxygen done clear
  D)
   None done clear
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• question_answer19)
  Chromium & Nickel metals are used for
  A)
   Stainless steel                  done clear
  B)
   Electro plating done clear
  C)
   Galvanisation                    done clear
  D)
   None done clear
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• question_answer20)
  The process of coating iron sheets with a thin layer of zinc is called
  A)
   Hibernation                       done clear
  B)
   Electroplating done clear
  C)
   Galvanisation        done clear
  D)
   None      done clear
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