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

done Metals and Non Metals HOTS Objective Problems Total Questions - 6

• question_answer1)
  The most abundant element on earth's crust is            
  A)
   Hydrogen           done clear
  B)
   Oxygen             done clear
  C)
   Silicon                                  done clear
  D)
   Carbon                             done clear
  View Solution play_arrow

• question_answer2)
  Which metal is used as a reducing agent in smelting         
  A)
   C            done clear
  B)
   Al   done clear
  C)
   Zn                          done clear
  D)
   None                   done clear
  View Solution play_arrow

• question_answer3)
  Which of the following is not found in free state?          
  A)
   Cu                          done clear
  B)
   Na   done clear
  C)
   Au                                         done clear
  D)
   Ag               done clear
  View Solution play_arrow

• question_answer4)
  Among the following groups of oxides, the group that cannot be reduced by carbon to give the respective metals is                                    
  A)
   \[C{{u}_{2}}O,{{K}_{2}}O\]          done clear
  B)
   \[F{{e}_{2}}{{O}_{3}},ZnO\] done clear
  C)
   \[CaO,{{K}_{2}}O\]     done clear
  D)
   \[PbO,F{{e}_{3}}{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer5)
  Fe and Zn are distinguished by                            
  A)
   HO                                         done clear
  B)
   HCl   done clear
  C)
   Alcohol                                done clear
  D)
   NaOH          done clear
  View Solution play_arrow

• question_answer6)
  Which of the following reacts most vigorously with water?
  A)
   Na                         done clear
  B)
   K     done clear
  C)
   Cs    done clear
  D)
   Rb done clear
  View Solution play_arrow