10th Class Science Chemical Reactions and Equations Question Bank

done Chemical Reactions and Acids, Bases and Salts Total Questions - 40

• question_answer1)
  Which one of the following is true about the reaction taking place in photosynthesis process?
  A)
  It is an endothermic reaction. done clear
  B)
  It is an exothermic reaction. done clear
  C)
  This reaction does not consume or release energy. done clear
  D)
  This reaction releases large amount of energy. done clear
  E)
  None of these done clear
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• question_answer2)
  Which one of the following reactions is correctly balanced?
  A)
  \[2{{H}_{2}}+{{O}_{2}}\to 2{{H}_{2}}O\]     done clear
  B)
  \[2{{H}_{2}}+{{O}_{2}}\to {{H}_{2}}O\] done clear
  C)
  \[2{{H}_{2}}+3{{O}_{2}}\to 2{{H}_{2}}O\]   done clear
  D)
  \[2{{H}_{2}}+2{{O}_{2}}\to 2{{H}_{2}}O\] done clear
  E)
  None of these done clear
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• question_answer3)
  Which of the following type of reaction is taking place in the chemical equation given below? \[8Fe+{{S}_{8}}\to 8FeS\]
  A)
  Combustion                   done clear
  B)
  Combination done clear
  C)
  Decomposition done clear
  D)
         Displacement done clear
  E)
  None of these done clear
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• question_answer4)
  Which of the following type of reaction is taking place in the chemical equation given below? \[Pb{{(N{{O}_{3}})}_{2}}+2KI\to Pb{{I}_{2}}+2KN{{O}_{3}}\]
  A)
  Combustion done clear
  B)
  Combination done clear
  C)
  Decomposition done clear
  D)
  Double displacement done clear
  E)
  None of these done clear
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• question_answer5)
  Which of the following is formed after rusting of iron?
  A)
  \[F{{e}_{2}}{{O}_{3}}.{{H}_{2}}O\] done clear
  B)
  \[FeO.{{H}_{2}}O\] done clear
  C)
  \[Fe{{O}_{3}}.{{H}_{2}}O\]                done clear
  D)
  \[F{{e}_{2}}O.{{H}_{2}}O\] done clear
  E)
  None of these done clear
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• question_answer6)
  Oxidation of fats and oils is called :
  A)
  Corrosion                       done clear
  B)
  Rusting done clear
  C)
  Photosynthesis done clear
  D)
         Rancidity done clear
  E)
  None of these done clear
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• question_answer7)
  The equation given below depicts which type of chemical reaction? \[A+BC\to AC+B\]
  A)
  Combustion                   done clear
  B)
  Combination done clear
  C)
  Decomposition    done clear
  D)
  Single displacement done clear
  E)
  None of these done clear
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• question_answer8)
  The destruction of a material containing metals due to chemical reactions with its surroundings is called:
  A)
  Rancidity           done clear
  B)
         Photosynthesis done clear
  C)
  Osmosis done clear
  D)
         Corrosion done clear
  E)
  None of these done clear
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• question_answer9)
  Which type of reaction is given below?             \[CuS{{O}_{4}}+Fe\xrightarrow{{}}FeS{{O}_{4}}+Cu\]
  A)
  Neutralisation     done clear
  B)
  Combination done clear
  C)
  Displacement      done clear
  D)
         Decomposition done clear
  E)
  None of these done clear
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• question_answer10)
  Which one of the following statements is correct for the given chemical reaction? \[ZnO+C\xrightarrow{{}}Zn+CO\]
  A)
  Zn O is reduced done clear
  B)
  Carbon is oxidized done clear
  C)
  Carbon is a reducing agent done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer11)
  Which one of the chemical reactions is unbalanced?
  A)
  \[Ca{{(OH)}_{2}}+C{{O}_{2}}\xrightarrow{{}}CaCO3+{{H}_{2}}O\] done clear
  B)
  \[{{H}_{2}}+{{O}_{2}}\xrightarrow{{}}{{H}_{2}}O\] done clear
  C)
  \[2{{H}_{2}}+{{O}_{2}}\xrightarrow{{}}2{{H}_{2}}O\] done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer12)
  Below four chemical equations are given. Identify the correct type of reaction for the given chemical equations.

  [A] \[CuS{{O}_{4}}+Zn\xrightarrow{{}}ZnS{{O}_{4}}+Cu\]

  [B] \[CaO+{{H}_{2}}O\xrightarrow{{}}Ca{{(OH)}_{2}}\]

  [C] \[2AgBr\xrightarrow{Light}2Ag+B{{r}_{2}}\]

  [D] \[4Fe+3{{O}_{2}}+2\times .{{H}_{2}}O\xrightarrow{{}}2F{{e}_{2}}{{O}_{3}}\times {{H}_{2}}O\]

  A)
  A - decomposition, B - combination, C - redox, D - displacement. done clear
  B)
  A - displacement, B - combination, C - redox, D - decomposition. done clear
  C)
  A - redox, B - combination, C - displacement, D - decomposition. done clear
  D)
  A - displacement, B - combination, C - decomposition, D - redox. done clear
  E)
  None of these done clear
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• question_answer13)
  Below two reactions are given.

  \[FeS{{O}_{4}}+Zn\xrightarrow{{}}ZnS{{O}_{4}}+Fe\]

  \[CuS{{O}_{4}}+Fe\xrightarrow{{}}FeS{{O}_{4}}+Cu\]

  The least reactive metal in the above reactions is:
  A)
  \[Fe\]                             done clear
  B)
  \[Cu\] done clear
  C)
  \[Zn\]                 done clear
  D)
         \[S{{O}_{4}}\] done clear
  E)
  None of these done clear
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• question_answer14)
  Which one of the following statements is correct?
  A)
  Addition of any electronegative atom in a chemical reaction is called oxidation. done clear
  B)
  Addition of hydrogen is called oxidation. done clear
  C)
  A substance which causes removal of oxygen from substances is called oxidizing agent. done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer15)
  In the given reaction:   \[{{H}_{2}}S+C{{l}_{2}}\xrightarrow{{}}HCl+S\]
  A)
  \[C{{l}_{2}}\] is oxidised. done clear
  B)
  \[{{H}_{2}}S\] is reducing agent. done clear
  C)
  \[{{H}_{2}}S\] is reduced. done clear
  D)
  \[C{{l}_{2}}\] is the reducing agent. done clear
  E)
  None of these done clear
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• question_answer16)
  Which one among the following is the most electronegative element?
  A)
  Potassium          done clear
  B)
         Chlorine done clear
  C)
  Sodium done clear
  D)
         Sulphur done clear
  E)
  None of these done clear
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• question_answer17)
  Which one of the following is incorrect?
  A)
  Rancidity can be prevented by adding anti-oxidants to foods containing fats and oils. done clear
  B)
  Rancidity can be prevented by packing fat and oil containing foods in oxygen gas. done clear
  C)
  Rancidity can be retarded by keeping food in a refrigerator. done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer18)
  Which one of the following is a double displacement reaction?
  A)
  \[Fe+CuS{{O}_{4}}\xrightarrow{{}}FeS{{O}_{4}}+Cu\] done clear
  B)
  \[AgN{{O}_{3}}+NaCl\xrightarrow{{}}AgCl+NaN{{O}_{3}}\] done clear
  C)
  \[2Mg+{{O}_{2}}\xrightarrow{{}}2MgO\] done clear
  D)
  \[2kCl{{O}_{3}}\xrightarrow{{}}2KCl+3{{O}_{2}}\] done clear
  E)
  None of these done clear
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• question_answer19)
  Which one of the following is correct about the given reaction? \[Cu+2A{{g}^{+}}\xrightarrow{{}}C{{u}^{{{2}^{+}}}}+2Ag\]
  A)
  \[Cu\]is oxidised and it is the oxidising agent. done clear
  B)
  \[Cu\]is oxidised it is the reducing agent. done clear
  C)
  \[A{{g}^{+}}\] is reduced it is the oxidising agent. done clear
  D)
  Both [b] and [c] done clear
  E)
  None of these done clear
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• question_answer20)
  Which one of the following is correct for the given chemical equations?

  [A] \[{{H}^{2}}S+{{I}_{2}}\xrightarrow{{}}S+2HI\]

  [B] \[Mn{{O}_{2}}+4HCl\xrightarrow{{}}MnC{{l}_{2}}+2{{H}_{2}}O+C{{l}_{2}}\]

  A)
  Only [A] is a redox reaction but [B] is not. done clear
  B)
  Only [B] is a redox reaction but [A] is not. done clear
  C)
  \[{{H}_{2}}S\] is the reducing agent in [A], \[HCl\] is the oxidising agent in [B]. done clear
  D)
  \[{{I}_{2}}\]is the oxidising agent in [A], \[Mn{{O}_{2}}\] is the oxidising agent in [B]. done clear
  E)
  None of these done clear
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• question_answer21)
  Which one among the following is a weak base?
  A)
  Sodium hydroxide done clear
  B)
  Potassium hydroxide done clear
  C)
  Ammonium hydroxide done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer22)
  Match the following:

  Column A	Column B
  (i) Chalk	[A] \[{{C}_{a}}O\]
  (ii) Quick lime	[B] \[{{C}_{a}}{{(OH)}_{2}}\]
  (iii) Slaked lime	[C] \[NaHC{{O}_{3}}\]
  (iv) Sodium bicarbonate	[D] \[{{C}_{a}}C{{O}_{3}}\]

  A)
  (i - D), (ii- B), (iii - A), (iv - C) done clear
  B)
  (i - D), (ii - A), (iii - B), (iv - C) done clear
  C)
  (i - B), (ii - A), (iii - D), (iv - C) done clear
  D)
  (i - C), (ii - D), (iii - B), (iv - A) done clear
  E)
  None of these done clear
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• question_answer23)
  Generally, when certain metals react with an acid it releases _______ gas.
  A)
  Nitrogen             done clear
  B)
  Oxygen done clear
  C)
  Hydrogen           done clear
  D)
  Argon done clear
  E)
  None of these done clear
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• question_answer24)
  Most of the oxides of metals when react with acid it forms:
  A)
  A base               done clear
  B)
  An acid done clear
  C)
  A salt    done clear
  D)
         Either [a] or [b] done clear
  E)
  None of these done clear
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• question_answer25)
  Which one of the following acids is used in the treatment of bone marrow and scurvy diseases?
  A)
  Acetic acid                     done clear
  B)
  Hydrochloric acid done clear
  C)
  Ascorbic acid      done clear
  D)
         Nitric acid done clear
  E)
  None of these done clear
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• question_answer26)
  Acid present in apple is:
  A)
  Oxalic acid                    done clear
  B)
  Malic acid done clear
  C)
  Acetic acid         done clear
  D)
         Formic acid done clear
  E)
  None of these done clear
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• question_answer27)
  Which one of the following is Hydracid?
  A)
  \[{{H}_{3}}P{{O}_{4}}\]                     done clear
  B)
  \[{{H}_{2}}S{{O}_{4}}\] done clear
  C)
  \[HCN\] done clear
  D)
         \[HN{{O}_{3}}\] done clear
  E)
  None of these done clear
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• question_answer28)
  Which one of the following is incorrect?
  A)
  Acids turn blue litmus paper red. done clear
  B)
  Aqueous solutions of acids conduct electricity. done clear
  C)
  Acids react with certain metals to form hydrogen gas. done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer29)
  In which one of the following reactions a salt is reacting with a base?
  A)
  \[NaOH+HCl\xrightarrow{{}}NaCl+{{H}_{2}}O\] done clear
  B)
  \[Cu{{(OH)}_{2}}+{{H}_{2}}S{{O}_{4}}\xrightarrow{{}}CuS{{O}_{4}}+2{{H}_{2}}O\] done clear
  C)
  \[KOH+HCl\xrightarrow{{}}KCl+{{H}_{2}}O\] done clear
  D)
  \[6N{{H}_{4}}OH+Al{{(S{{O}_{4}})}_{3}}\xrightarrow{{}}2Al{{(OH)}_{3}}\]\[+3{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\] done clear
  E)
  None of these done clear
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• question_answer30)
  Which one of the following is commonly known as blue vitriol and is used as a fungicide?
  A)
  Potassium nitrate            done clear
  B)
  Copper sulphate done clear
  C)
  Sodium carbonate done clear
  D)
         Sodium chloride done clear
  E)
  None of these done clear
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• question_answer31)
  Which of the following is a mineral acid?
  A)
  Lactic acid                     done clear
  B)
  Formic acid done clear
  C)
  Tartaric acid       done clear
  D)
         Hydrochloric done clear
  E)
  None of these done clear
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• question_answer32)
  Which of the following is an organic acid?
  A)
  Citric acid                      done clear
  B)
  Hydrochloric acid done clear
  C)
  Lactic acid                              done clear
  D)
                      Both [a] and [c] done clear
  E)
  None of these done clear
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• question_answer33)
  Which one of the following is formed when sodium hydrogen carbonate reacts with hydrochloric acid?
  A)
  Sodium chloride  done clear
  B)
  Carbon dioxide done clear
  C)
  Water    done clear
  D)
         All the above done clear
  E)
  None of these done clear
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• question_answer34)
   A strong acid:
  A)
  Completely gets ionized in water. done clear
  B)
  Partially gets ionized in water. done clear
  C)
  Do not get ionized in water. done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer35)
  Which one of the following is formed when calcium hydroxide reacts with carbon dioxide?
  A)
  Hydrogen gas     done clear
  B)
  Water done clear
  C)
  Salt                   done clear
  D)
         Both [b] and [c] done clear
  E)
  None of these done clear
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• question_answer36)
  Which of the following is a strong base?
  A)
  Calcium hydroxide done clear
  B)
  Magnesium hydroxide done clear
  C)
  Ammonium hydroxide done clear
  D)
  Potassium hydroxide done clear
  E)
  None of these done clear
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• question_answer37)
  Which of the following is used as an antacid?
  A)
  Sodium hydrocarbonate done clear
  B)
  Calcium hydroxide done clear
  C)
  Magnesium hydroxide done clear
  D)
  All the above done clear
  E)
  None of these done clear
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• question_answer38)
  Which of the following is the pH value of pure water?
  A)
  0                                  done clear
  B)
  7 done clear
  C)
  8                      done clear
  D)
         1 done clear
  E)
  None of these done clear
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• question_answer39)
  Which one of the following is true, if a substance has a pH value of 4?
  A)
  The substance is a base. done clear
  B)
  The substance is an acid. done clear
  C)
  The substance is a neutral substance. done clear
  D)
  Either [a] or [b] done clear
  E)
  None of these done clear
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• question_answer40)
  Which one of the following is true, if a substance has a pH value of 7?
  A)
  The substance is a base. done clear
  B)
  The substance is an acid. done clear
  C)
  The substance is a neutral substance. done clear
  D)
  Either [a] and [b] done clear
  E)
  None of these done clear
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