Railways General Science & Technology General Concepts of Chemistry Sample Paper

done General Concepts of Chemistry Sample Test Paper-22 Total Questions - 20    [Download]

• question_answer1)
  Equivalent weight of crystalline oxalic acid is
  A)
   45       
  done clear
  B)
          90
  done clear
  C)
   126     
  done clear
  D)
   63
  done clear
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• question_answer2)
  Atomic weight of a trivalent element of equivalent weight 9 is
  A)
   9                    
  done clear
  B)
   27
  done clear
  C)
   18       
  done clear
  D)
   36
  done clear
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• question_answer3)
  Reduction involves
  A)
   Loss of electrons
  done clear
  B)
   Addition of electrons
  done clear
  C)
   Increasing in oxidation number
  done clear
  D)
   None of the above
  done clear
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• question_answer4)
  A reducing agent is a substance which can
  A)
   Accept electrons
  done clear
  B)
          donate electrons
  done clear
  C)
   Accept protons
  done clear
  D)
   donate protons
  done clear
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• question_answer5)
  Oxidation involves
  A)
   Loss of electron
  done clear
  B)
   gain of electrons
  done clear
  C)
   Both [a] and [b]
  done clear
  D)
   None of these
  done clear
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• question_answer6)

  \[2HN{{O}_{3}}+Ca{{(OH)}_{2}}\xrightarrow{{}}Ca(N{{O}_{3}})+2{{H}_{2}}O;\] is an example of

  (i) Displacement reaction

  (ii) Double displacement reaction

  (iii) Neutralisation reaction

  (iv) Combination reaction

  A)
   (i) and (ii)         
  done clear
  B)
   (ii) and (iii)
  done clear
  C)
   (iii) and (iv)      
  done clear
  D)
   (i) and (iv)
  done clear
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• question_answer7)
  Identify 'x', y and 'z' in the following balanced reaction \[xPb{{(N{{O}_{3}})}_{2}}(s)\xrightarrow{{}}yPbO(s)+zN{{O}_{2}}(g)+{{O}_{2}}(g)\]
  A)
   2, 4, 2 
  done clear
  B)
   2, 2, 4
  done clear
  C)
   2, 4, 4 
  done clear
  D)
   4, 2, 2
  done clear
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• question_answer8)

  Identify the type of reaction

  \[Fe(s)+CuS{{O}_{4}}(aq)\xrightarrow{{}}FeS{{O}_{4}}(aq)+Cu(s)\]

  (i) Displacement reaction

  (ii) Redox reaction

  (iii) Combination reaction

  (iv)Double displacement reaction

  A)
   (i) and (ii)         
  done clear
  B)
   (ii) and (iii)
  done clear
  C)
   (i) and (iv)        
  done clear
  D)
   (iii) and (iv)
  done clear
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• question_answer9)
  Which of the following is precipitation as well as double displacement reaction?
  A)
   \[NaOH(aq)+HN{{O}_{3}}(aq)\xrightarrow{{}}\]\[NaN{{O}_{3}}(aq)+{{H}_{2}}O(l)\]
  done clear
  B)
   \[Cu(s)+2AgN{{O}_{3}}(aq)\xrightarrow{{}}\]\[Cu{{(N{{O}_{3}})}_{2}}(aq)+2Ag(s)\]
  done clear
  C)
   \[2Hg(s)+{{O}_{2}}(g)\xrightarrow{heat}2HgO(s)\]
  done clear
  D)
   \[FeC{{I}_{3}}(aq)+3N{{H}_{4}}OH(aq)\xrightarrow{{}}\]\[Fe{{(OH)}_{3}}(s)+3N{{H}_{4}}CI(aq)\]
  done clear
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• question_answer10)
  \[S{{O}_{2}}+2{{H}_{2}}S\xrightarrow{{}}2{{H}_{2}}O+3S;S{{O}_{2}}\] is acting as
  A)
   Oxidising agent
  done clear
  B)
   Reducing agent
  done clear
  C)
   Both oxidising as well as reducing agent
  done clear
  D)
   Catalyst
  done clear
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• question_answer11)
  \[C{{H}_{4}}+2{{O}_{2}}\xrightarrow{{}}C{{O}_{2}}+2{{H}_{2}}O\] The above reaction is
  A)
   Oxidation
  done clear
  B)
   Decomposition reaction
  done clear
  C)
   Endothermic reaction
  done clear
  D)
   Double displacement reaction
  done clear
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• question_answer12)

  (i) \[2{{H}_{2}}+{{O}_{2}}\xrightarrow{electricity}2{{H}_{2}}O:\,\,\underline{Combustion\,\,reaction}\]

  (ii) \[2N{{H}_{3}}\xrightarrow{heat}{{N}_{2}}+3{{H}_{2}}:\] ________________

  A)
   Decomposition reaction
  done clear
  B)
   Combination reaction
  done clear
  C)
   Displacement reaction
  done clear
  D)
   Double displacement reaction
  done clear
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• question_answer13)
  To neutralise 20 ml of M/10 sodium hydroxide, the volume of M/20 hydrochloric acid required is
  A)
   10 ml  
  done clear
  B)
   15 ml
  done clear
  C)
   20 ml  
  done clear
  D)
          40 ml
  done clear
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• question_answer14)
  The percentage of oxygen in \[NaOH\] is
  A)
   40                   
  done clear
  B)
   60
  done clear
  C)
   8                    
  done clear
  D)
   10
  done clear
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• question_answer15)
  Molarity is expressed as
  A)
   Gram/litre        
  done clear
  B)
          Moles/litre
  done clear
  C)
   Litre/mole        
  done clear
  D)
   Moles/1000gms
  done clear
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• question_answer16)
  The molarity of a solution of \[N{{a}_{2}}C{{O}_{3}}\] having 10.6g/500ml of solution is
  A)
   0.2 M  
  done clear
  B)
   2 M
  done clear
  C)
   20 M               
  done clear
  D)
   0.02 M
  done clear
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• question_answer17)
  Mass of 0.1 mole of methane is
  A)
   1.6 g               
  done clear
  B)
   0.1 g
  done clear
  C)
   1 g                  
  done clear
  D)
   16 g
  done clear
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• question_answer18)
  Which of the following reaction is not balanced?
  A)
   \[3Fe+4{{H}_{2}}O\to F{{e}_{3}}{{O}_{4}}+4{{H}_{2}}\]
  done clear
  B)
   \[KCI{{O}_{3}}\to KCI+{{O}_{2}}\]
  done clear
  C)
   \[CaC{{O}_{3}}\to Ca+C{{O}_{2}}\]
  done clear
  D)
   \[Mg+2HCI\to MgC{{I}_{2}}+{{H}_{2}}\]
  done clear
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• question_answer19)
  Which of the following equation is balanced?
  A)
   \[CaC{{O}_{3}}\to CaO+C{{O}_{2}}\]
  done clear
  B)
   \[NaN{{O}_{3}}\to NaN{{O}_{2}}+{{O}_{2}}\]
  done clear
  C)
   \[{{H}_{2}}{{O}_{2}}\to {{H}_{2}}O+{{O}_{2}}\]
  done clear
  D)
   \[A{{l}_{2}}C{{O}_{3}}\to A{{l}_{2}}{{O}_{3}}+C{{O}_{2}}\]
  done clear
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• question_answer20)
  Hydrogen sulphide \[({{H}_{2}}S)\] is a strong reducing agent. Which of the following reactions shows its reducing action -
  A)
   \[Cd{{(N{{O}_{3}})}_{2}}+{{H}_{2}}S\xrightarrow{{}}CdS+2HN{{O}_{3}}\]
  done clear
  B)
   \[CuS{{O}_{4}}+{{H}_{2}}S\xrightarrow{{}}CuS+{{H}_{2}}S{{O}_{4}}\]
  done clear
  C)
   \[2FeC{{I}_{3}}+{{H}_{2}}S\xrightarrow{{}}2FeC{{I}_{2}}+2HCI+S\]
  done clear
  D)
   \[Pb{{(N{{O}_{3}})}_{2}}+{{H}_{2}}S\xrightarrow{{}}PbS+2C{{H}_{3}}COOH\]
  done clear
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