UPSC Chemistry Acids, Bases and Salts / अम्ल, क्षार एवं लवण Question Bank

done Acids, Bases, Salts and Metals Total Questions - 40

• question_answer1)
  Plaster of parts is obtained -
  A)
  by adding water to calcium sulphate done clear
  B)
  by adding sulphuric acid to calcium hydroxide done clear
  C)
  by heating gypsum to a very high temperature done clear
  D)
  by heating gypsum to 373 K. done clear
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• question_answer2)
        Bleaching powder gives smell of chlorine because it-
  A)
  is unstable done clear
  B)
  gives chlorine on exposure to atmosphere done clear
  C)
  is a mixture of chlorine and slaked lime done clear
  D)
  contains excess of chlorine done clear
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• question_answer3)
        Why bases are kept in glass bottles?
  A)
  Bases produce \[O{{H}^{-}}\] ions in aqueous solutions done clear
  B)
  Basic solutions are conducting in nature done clear
  C)
  Bases are corrosive in nature done clear
  D)
  Bases have soapy texture done clear
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• question_answer4)
        Which one of the following salts when dissolved in water makes the solution basic? [NDA]
  A)
  Sodium chloride                                         done clear
  B)
  Copper sulphate done clear
  C)
  Ferric chloride done clear
  D)
  Sodium acetate done clear
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• question_answer5)
        Which of the following salts are insoluble in water? [NDA]
  A)
  Chlorides of Fe and Mn done clear
  B)
  Nitrates of Ag and Pb done clear
  C)
  Carbonates of Pb and Cu done clear
  D)
  Phosphates of Na and \[N{{H}_{4}}\] done clear
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• question_answer6)
  Two elements gallium and oxygen combine to form a compound \[G{{a}_{2}}{{O}_{3}}\]. Which among the following is the valency of gallium? [NDA]
  A)
  1                      done clear
  B)
  2 done clear
  C)
  3                 done clear
  D)
  4 done clear
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• question_answer7)
  Arrange the following bases in increasing order of their, basic strength [NDA]

  1. Sodium hydroxide

  2. Magnesium hydroxide

  3. Aluminium hydroxide

  4. Ammonium hydroxide

  Select the correct answer using the code given below
  A)
  A-4,   B-2,   C-1,   D-3 done clear
  B)
  A-4,   B-1,   C-2,   D-3 done clear
  C)
  A-4,   B-3,   C-2,   D-1 done clear
  D)
  A-1,   B-2,   C-3,   D-4 done clear
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• question_answer8)
        Which one among the following is not a property of salt? [NDA]
  A)
  Salts have ordered packing arrangements called lattices done clear
  B)
  Salts have low melting points but high boiling points done clear
  C)
  Salts are brittle done clear
  D)
  Salts conduct electricity when dissolved in water or even in the molten state done clear
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• question_answer9)
        Which   among   the   following   statements   with regard   to   pH   scale   is/are   correct? [NDA]

  I. It is a logarithmic scale.

  II. The scale is limited to 0-14 because the ionic product of water is about \[{{10}^{-14}}\]

  III. The lower the value of pH, the greater is the acidity of the solution.

  Select the correct answer using the code given below
  A)
  I and II only done clear
  B)
  I, II and III done clear
  C)
  I and III only done clear
  D)
  II only done clear
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• question_answer10)
       

  Statement I: Metal ions are Lewis acids.

  Statement II: Metal ions are electron pair acceptors. [NDA]

                                                      
  A)
  Both the statements individually true and Statement II is the correct explanation of Statement I. done clear
  B)
  Both the statements are individually true but Statement II is not correct explanation of Statement I. done clear
  C)
  Statement I is true but Statement II is false. done clear
  D)
  Statement I is false but Statement II is true. done clear
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• question_answer11)
        Neutral water with pH about 7 becomes slightly acidic when aerated. This is because [NDA]
  A)
  oxygen from air is dissolved in the water which makes the water acidic done clear
  B)
  dirt, which get contaminated with the water during aeration makes the water acidic done clear
  C)
  ultraviolet radiation dissociates water molecules and makes water acidic done clear
  D)
  carbon-dioxide from air is dissolved done clear
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• question_answer12)
        The concentration of hydrochloric acid in a given solution is \[{{10}^{-8}}\]M. What is the value of pH for this solution? [NDA]
  A)
  7                done clear
  B)
           > 7 but not 14 done clear
  C)
  <7              done clear
  D)
           14 done clear
  View Solution play_arrow

• question_answer13)
  Human stomach produces acid 'X' which helps in digestion of food. Acid 'X' is [NDA]
  A)
  acetic acid done clear
  B)
  methanoic acid done clear
  C)
  hydrochloric acid done clear
  D)
  citric acid done clear
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• question_answer14)
        Bases turn red litmus blue and acids turn blue litmus red. A student tested a liquid with a red litmus paper and it stayed red with no change. This shows that the liquid [NDA]
  A)
  must be pure water done clear
  B)
  must be an acid done clear
  C)
  is not a base done clear
  D)
  is neither a base nor an acid done clear
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• question_answer15)
        Which of the following statements regarding oxidation and reduction are correct? [NDA]

  1. In oxidation, loss of electron takes place whereas in reduction, gain of electron takes place.

  2. In oxidation, gain of electron takes place whereas in reduction, loss of electron takes place.

  3. Oxidizing agent decreases the oxidation number but reducing agent increases the oxidation number.

  4. Oxidizing agent increases the oxidation number but reducing agent reduces the oxidation number.

                                        Select the correct answer using the code given below: Code:
  A)
  1 and 3                done clear
  B)
           2 and 4 done clear
  C)
  2 and 3                done clear
  D)
           1 and 4 done clear
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• question_answer16)
        The following equation is an example of a redox reaction, in which \[C{{l}_{2}}\] is the oxidizing agent and \[FeB{{r}_{3}}\] is the reducing agent:

  \[2FeB{{r}_{3}}\,\,(aq)\,\,+\,\,3C{{l}_{2}}\,\,(g)=2FeCl\,{{\,}_{3}}(aq)\,\,+\,\,3B{{r}_{2}}\,\,(1)\]

  Which one among the following statements is incorrect for this redox reaction? [NDA]

  A)
  Oxidizing agents are themselves reduced done clear
  B)
  Reducing agents gain or appear to gain electrons done clear
  C)
  Reducing agents are themselves oxidized done clear
  D)
  Oxidizing agents oxidize other substances done clear
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• question_answer17)
        Which one among the following is the correct order of strength of acids? [NDA]
  A)
  \[{{H}_{2}}S{{O}_{4}}>{{H}_{3}}P{{O}_{3}}>C{{H}_{3}}COOH\] done clear
  B)
  \[{{H}_{3}}P{{O}_{3}}>{{H}_{2}}S{{O}_{4}}>C{{H}_{3}}COOH\] done clear
  C)
  \[C{{H}_{3}}COOH>{{H}_{3}}P{{O}_{3}}>{{H}_{2}}S{{O}_{4}}\] done clear
  D)
  \[C{{H}_{3}}COOH>{{H}_{2}}S{{O}_{4}}>{{H}_{3}}P{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer18)
        Which one among the following is an electrochemical cell that cannot be charged? [NDA]
  A)
  Electrolytic cell        done clear
  B)
           Storage cell done clear
  C)
  Primary cell done clear
  D)
           Fuel cell done clear
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• question_answer19)
         The pH of fresh milk is 6. When it turns sour, the pH [NDA]
  A)
  becomes < 6 done clear
  B)
  remains the same i.e., 6 done clear
  C)
  becomes > 6 done clear
  D)
  becomes neutral, i.e., 7 done clear
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• question_answer20)
        Which one among the following is a double salt? [NDA]
  A)
  \[{{K}_{4}}[Fe{{(CN)}_{6}}]\] done clear
  B)
  \[{{K}_{2}}S{{O}_{4}}.A{{l}_{2}}{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O\] done clear
  C)
  \[CuS{{O}_{4}}.5{{H}_{2}}O\] done clear
  D)
  \[NaCl\] done clear
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• question_answer21)
       

  Statement I: Addition of water to an aqueous solution of HCl decreases the pH. [CDS]

  Statement II: Addition of water suppresses the ionisation of HCl.

  A)
  Both the statements are individually true and Statement II is the correct explanation of Statement I done clear
  B)
  Both the statements are individually true but Statement II is not the correct explanation of Statement I done clear
  C)
  Statement I is true, but Statement II is false done clear
  D)
  Statement I is false, but Statement II is true done clear
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• question_answer22)
        The pH of fresh ground water slightly decreases upon exposure to air because [CDS]
  A)
  carbon dioxide from air is dissolved in the water done clear
  B)
  oxygen from air is dissolved in the water done clear
  C)
  the dissolved carbon dioxide of the ground water escapes into air done clear
  D)
  the dissolved oxygen of the ground water escapes into air done clear
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• question_answer23)
        On the labels of the bottles, some soft drinks are claimed to be acidity regulators. They regulate acidity using [CDS]
  A)
  carbon dioxide done clear
  B)
  bicarbonate salts done clear
  C)
  Both [a] and [b] done clear
  D)
  carbon dioxide and lime done clear
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• question_answer24)
        Antacids are commonly used to get rid of acidity in the stomach. A commonly used antacid is [CDS]
  A)
  sodium hydrogen phthalate done clear
  B)
  magnesium hydroxide done clear
  C)
  calcium hydroxide done clear
  D)
  manganese acetate done clear
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• question_answer25)
        Which of the following is not correct about Baking Soda? [CDS]
  A)
  It is used in soda acid fire extinguisher done clear
  B)
  It is added for faster cooking. done clear
  C)
  It is a corrosive base done clear
  D)
  It neutralizes excess acid in the stomach done clear
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• question_answer26)
        The acid in gastric juice is [NDA]
  A)
  acetic acid              done clear
  B)
           nitric acid done clear
  C)
  hydrochloric acid done clear
  D)
           sulphuric acid done clear
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• question_answer27)
        Removal of impurities from ore is known as -
  A)
  crushing and grinding done clear
  B)
  concentration of ore done clear
  C)
  calcination done clear
  D)
  roasting done clear
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• question_answer28)
        Aluminium is used in thermite welding because -
  A)
  aluminium is a light metal done clear
  B)
  aluminium has more affinity for oxygen done clear
  C)
  aluminium is a strong oxidising agent done clear
  D)
  aluminium is a reactive metal done clear
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• question_answer29)
        Which method is employed for obtaining a pure metal?
  A)
  Froth floatation    done clear
  B)
           Electrolytic refining done clear
  C)
  Magnetic separation   done clear
  D)
  Gravity separation done clear
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• question_answer30)
       

  	Column-I		Column-II
  A.	Hardest Non-metal	P.	Graphite
  B.	Non-metal conducts electricity	Q.	Sulphur
  C.	Non-metal with lustre	R.	Diamond (Carbon)
  D.	Non-metal used as fungicide	S.	Iodine

   
  A)
  A-R;   B-P;   C-S;   D-Q done clear
  B)
  A-Q;   B-P;   C-S;   D-R done clear
  C)
  A-P;   B-R;   C-S;   D-Q done clear
  D)
  A-R;   B-P;   C-Q;   D-S done clear
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• question_answer31)
       

  	Column-I (Alloy)		Column-II (Composition of Elements)
  A.	Steel	P.	Cu and Sn
  B.	Brass	Q.	Cu and Zn
  C.	Bronze	R.	Fe, C and Cr
  D.	Magnalium	S.	Al and Mg

   
  A)
  A-Q;   B-R;   C-P;   D-S done clear
  B)
  A-R;   B-Q;   C-P;   D-S done clear
  C)
  A-Q;   B-R;   C-S;   D-P done clear
  D)
  A-R;   B-Q;   C-S;   D-P done clear
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• question_answer32)
       

  	Column-I  (Product)		Column-II (Name of alloy)
  A.	Aircrafts	P.	Stainless steel
  B.	Utensils	Q.	Bronze
  C.	Medals	R.	Magnalium
  D.	Balance beam	S.	Duralumin

   
  A)
  A-S;   B-P;   C-Q;   D-R done clear
  B)
  A-P;   B-S;   C-Q;   D-R done clear
  C)
  A-S;   B-P;   C-R;   D-Q done clear
  D)
  A-P;   B-S;   C-R;   D-Q done clear
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• question_answer33)
        What is anode mud?
  A)
  Fan of anode done clear
  B)
  Metal of anode done clear
  C)
  Impurities collected at anode in electrolysis during purification of metals      done clear
  D)
  All of these done clear
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• question_answer34)
        Food cans are coated with tin and not with zinc because [CDS]
  A)
  zinc is costlier than tin. done clear
  B)
  zinc has a higher melting point than tin. done clear
  C)
  zinc is more reactive than tin. done clear
  D)
  zinc is less reactive than tin. done clear
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• question_answer35)
       

  	Column-I		Column-II
  A.	Titanium	P.	Coinage metal
  B.	Palladium	Q.	Fuel
  C.	Uranium	R.	Catalyst
  D.	Platinum	S.	Strategic metal

   
  A)
  A-S;   B-R;   C-Q;   D-P done clear
  B)
  A-P;   B-R;   C-Q;   D-S done clear
  C)
  A-R;   B-S;   C-Q;   D-P done clear
  D)
  A-S;   B-Q;   C-R;   D-P done clear
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• question_answer36)
  'Yellow cake', an item of smuggling across border is [IAS Prelim]
  A)
  a crude form of heroin done clear
  B)
  a crude form of cocaine done clear
  C)
  uranium oxide done clear
  D)
  unrefined gold done clear
  View Solution play_arrow

• question_answer37)
        Which one of the following materials is very hard and very ductile? [IAS Prelim]
  A)
  Carborundum      done clear
  B)
           Tungsten done clear
  C)
  Cast iron          done clear
  D)
                     Nichrome done clear
  View Solution play_arrow

• question_answer38)
  Match List I with List II and select the correct answer using the codes given below the lists: [IAS Prelim]

  	List-I		List-II
  A.	Blue vitriol	1.	Sodium bicarbonate
  B.	Epsom salt	2.	Sodium hydroxide
  C.	Baking soda	3.	Magnesium sulphate
  D.	Caustic soda	4.	Copper sulphate

   
  A)
  A-3;   B-4;   C-2;   D-1 done clear
  B)
  A-4;   B-3;   C-2;   D-1 done clear
  C)
  A-3;   B-4;   C-1;   D-2 done clear
  D)
  A-4;   B-3;   C-1;   D-2 done clear
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• question_answer39)
  Match List-I with List-II and select the correct answer using the codes given below the lists: [IAS Prelim]

  	List-I		List-II
  A.	Potassium bromide	1.	Fertiliser
  B.	Potassium nitrate	2.	Photography
  C.	Potassium sulphate	3.	Bakery
  D.	Monopotassium	4.	Gun powder tartarate

  Codes:
  A)
  A-2;   B-4;   C-1;   D-3 done clear
  B)
  A-2;   B-3;   C-1;   D-4 done clear
  C)
  A-4;   B-2;   C-3;   D-1 done clear
  D)
  A-4;   B-2;   C-1;   D-3 done clear
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• question_answer40)
                                                                      

  	List-I (Mineral)		List-II Industries in which largely  [CDS]
  A.	Limestone	1.	Cement
  B.	Copper	2.	Electrical goods
  C.	Bauxite aeroplanes	3.	Manufacture of
  D.	Manganese	4.	Steel

   
  A)
  A-3,   B-4,   C-1,   D-2 done clear
  B)
  A-1,   B-2,   C-3,   D-4 done clear
  C)
  A-3,   B-2,   C-1,   D-4 done clear
  D)
  A-1,   B-4,   C-3,   D-2 done clear
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