Applied Chemistry Viva Chemical Engineering Notes | EduRev

Chemical Engineering : Applied Chemistry Viva Chemical Engineering Notes | EduRev

 Page 1


Model Viva Questions Chemistry Lab 
Common to : CS, IT, ET  1
st
 Sem 
Title of the practical: Identification of two cations and two anions in a sample of mixture. 
 
Q1: What is qualitative analysis? 
A1: The type of analysis that deals with the methods which are used to determine the constituents of a compound.  
Q2: What is a radical? 
A3: A radical may be defined as an atom or group of atoms which carries charge and behaves as a single unit in chemical 
reaction.  
Q3:  What are acidic and basic radicals?  
A3:  Radicals caring positive charge are called basic radicals and those carrying negative charge are called acidic 
radicals.   
Q4:  What type of bond is present in an inorganic salt? 
A4 : Electrovalent type of bond is present in an inorganic salt.  
Q5:  Name the acid radicals detected with dil. H
2
 SO
4
? 
A5:  CO
3
2-
, S
2-
, SO
3
2-
, NO
2
-
 
Q6: Name the acid radicals detected by Conc., H
2
SO
4
 
A6: Cl
-
, Br
-
, I
-
, NO
3
, CH
3
COO
-
 
Q7: Name the radicals which are tested with the help of sodium carbonate extract? 
A7: S
2-
, Cl
-
, Br
-
, I
-
,  PO
4
3-
, SO
4
2-
, SO
3
2-
 
Q8: Name the radical which produce CO
2
 on heating. 
A8: Carbonate.  
Q9: Name the salts which produce crackling sound when heated? 
A9: Lead nitrate, Barium nitrate, Potassium bromide, Sodium chloride.  
Q10: What is lime water? 
A10:  Solution of Ca(OH)
2
 in water is called lime water.  
 
                                                                
 
 
 
 
 
 
 
 
Page 2


Model Viva Questions Chemistry Lab 
Common to : CS, IT, ET  1
st
 Sem 
Title of the practical: Identification of two cations and two anions in a sample of mixture. 
 
Q1: What is qualitative analysis? 
A1: The type of analysis that deals with the methods which are used to determine the constituents of a compound.  
Q2: What is a radical? 
A3: A radical may be defined as an atom or group of atoms which carries charge and behaves as a single unit in chemical 
reaction.  
Q3:  What are acidic and basic radicals?  
A3:  Radicals caring positive charge are called basic radicals and those carrying negative charge are called acidic 
radicals.   
Q4:  What type of bond is present in an inorganic salt? 
A4 : Electrovalent type of bond is present in an inorganic salt.  
Q5:  Name the acid radicals detected with dil. H
2
 SO
4
? 
A5:  CO
3
2-
, S
2-
, SO
3
2-
, NO
2
-
 
Q6: Name the acid radicals detected by Conc., H
2
SO
4
 
A6: Cl
-
, Br
-
, I
-
, NO
3
, CH
3
COO
-
 
Q7: Name the radicals which are tested with the help of sodium carbonate extract? 
A7: S
2-
, Cl
-
, Br
-
, I
-
,  PO
4
3-
, SO
4
2-
, SO
3
2-
 
Q8: Name the radical which produce CO
2
 on heating. 
A8: Carbonate.  
Q9: Name the salts which produce crackling sound when heated? 
A9: Lead nitrate, Barium nitrate, Potassium bromide, Sodium chloride.  
Q10: What is lime water? 
A10:  Solution of Ca(OH)
2
 in water is called lime water.  
 
                                                                
 
 
 
 
 
 
 
 
Title of the practical: To determine the percentage of copper in a given sample of brass. 
 
Q1: What is brass.  
A1: Brass is an alloy of copper and zinc.  
Q2: Give the chemical composition of brass. 
A2: The composition of the brass is Copper (60 to 80 %) and Zinc (20 to 40%) along with small amount of lead      ( 0-2%)  
tin ( 0 to 6%) and Iron (0-1%).  
Q3: What is normality? 
A3: The fraction of gram equivalent of the substance dissolved per litre of the  solution is known as normality.  
Q4: What is standard solution? 
A4: Standard solution is that whose strength is known. 
Q5: By which method we determine the percentage of copper? 
A5: We determine the percentage of copper by iodometrically. 
Q6: What is Iodometric Titration?  
A6: Volumetric analysis in which iodine is liberated during a chemical reaction from KI is known as iodometric Titration.  
Q7: What is titration.  
A7: Titration is a process in which the concentration of unknown solution is determined with the help of a standard solution 
and indicator.  
A8: Titration is mainly of four type:- 
(i) Acidimetry and alkalimetry. (ii) Redox titration. 
(iii) Iodometry and iodimetry.   (iv)    Precipitation.  
 
Q9: What is end point? 
A9: When the reaction of two solution is completed that  point is known as end point.   
Q10: 10 Give the types of indicators. 
A10: Indicators of three types:- 
i) Internal indicator 
ii) External indicator 
iii) Self indicator. 
 
 
 
 
 
 
 
 
 
 
Page 3


Model Viva Questions Chemistry Lab 
Common to : CS, IT, ET  1
st
 Sem 
Title of the practical: Identification of two cations and two anions in a sample of mixture. 
 
Q1: What is qualitative analysis? 
A1: The type of analysis that deals with the methods which are used to determine the constituents of a compound.  
Q2: What is a radical? 
A3: A radical may be defined as an atom or group of atoms which carries charge and behaves as a single unit in chemical 
reaction.  
Q3:  What are acidic and basic radicals?  
A3:  Radicals caring positive charge are called basic radicals and those carrying negative charge are called acidic 
radicals.   
Q4:  What type of bond is present in an inorganic salt? 
A4 : Electrovalent type of bond is present in an inorganic salt.  
Q5:  Name the acid radicals detected with dil. H
2
 SO
4
? 
A5:  CO
3
2-
, S
2-
, SO
3
2-
, NO
2
-
 
Q6: Name the acid radicals detected by Conc., H
2
SO
4
 
A6: Cl
-
, Br
-
, I
-
, NO
3
, CH
3
COO
-
 
Q7: Name the radicals which are tested with the help of sodium carbonate extract? 
A7: S
2-
, Cl
-
, Br
-
, I
-
,  PO
4
3-
, SO
4
2-
, SO
3
2-
 
Q8: Name the radical which produce CO
2
 on heating. 
A8: Carbonate.  
Q9: Name the salts which produce crackling sound when heated? 
A9: Lead nitrate, Barium nitrate, Potassium bromide, Sodium chloride.  
Q10: What is lime water? 
A10:  Solution of Ca(OH)
2
 in water is called lime water.  
 
                                                                
 
 
 
 
 
 
 
 
Title of the practical: To determine the percentage of copper in a given sample of brass. 
 
Q1: What is brass.  
A1: Brass is an alloy of copper and zinc.  
Q2: Give the chemical composition of brass. 
A2: The composition of the brass is Copper (60 to 80 %) and Zinc (20 to 40%) along with small amount of lead      ( 0-2%)  
tin ( 0 to 6%) and Iron (0-1%).  
Q3: What is normality? 
A3: The fraction of gram equivalent of the substance dissolved per litre of the  solution is known as normality.  
Q4: What is standard solution? 
A4: Standard solution is that whose strength is known. 
Q5: By which method we determine the percentage of copper? 
A5: We determine the percentage of copper by iodometrically. 
Q6: What is Iodometric Titration?  
A6: Volumetric analysis in which iodine is liberated during a chemical reaction from KI is known as iodometric Titration.  
Q7: What is titration.  
A7: Titration is a process in which the concentration of unknown solution is determined with the help of a standard solution 
and indicator.  
A8: Titration is mainly of four type:- 
(i) Acidimetry and alkalimetry. (ii) Redox titration. 
(iii) Iodometry and iodimetry.   (iv)    Precipitation.  
 
Q9: What is end point? 
A9: When the reaction of two solution is completed that  point is known as end point.   
Q10: 10 Give the types of indicators. 
A10: Indicators of three types:- 
i) Internal indicator 
ii) External indicator 
iii) Self indicator. 
 
 
 
 
 
 
 
 
 
 
Title of the practical: To determine the percentage of iron in a iron salt by redox titration. 
 
Q1: What are  redox titration?  
A1: Reactions which involve simultaneous oxidation and reduction are called redox reactions and the titration 
involving redox reactions are called redox titration.  
Q2: What is self indicators? 
A3:. When one of the reactants itself acts as indicator and no external substance is required to indicate the end point 
of titration.  
Q3: What is permangnometry? 
A3: Redox titrations involving KMnO
4
 as the oxidizing agent are called permagnometry.  
Q4: Why KMnO
4 
solution is kept in dark or coloured bottle.  
A4: Because in presence of sunlight, KMnO
4 
disintegrates.  
Q5: In which terms we express the percentage of Iron? 
A5: Percentage of Iron is expressed in terms of grams.  
Q6: What is titration? 
A6: The process of adding one solution from the burette to another in the titration flask in order to complete the 
chemical reaction involved is known as titration.  
Q7: What is indicator?  
A7: Indicator is a chemical substance which changes colour at the end point. 
Q8: What is end point? 
A8: The stage during titration at which the reaction is just complete is known as the end point of titration.  
Q9: What is acidimetry and alkalimetry? 
A9: It is the branch of volumetric analysis involving chemical reaction between an acid and a base.  
Q10: Why the last drop of solution must not be blown out of a pipette? 
A10: Since the drops left in the jet and is extra of the volume measured by the pipette.  
 
 
 
 
 
 
 
 
 
 
 
 
Page 4


Model Viva Questions Chemistry Lab 
Common to : CS, IT, ET  1
st
 Sem 
Title of the practical: Identification of two cations and two anions in a sample of mixture. 
 
Q1: What is qualitative analysis? 
A1: The type of analysis that deals with the methods which are used to determine the constituents of a compound.  
Q2: What is a radical? 
A3: A radical may be defined as an atom or group of atoms which carries charge and behaves as a single unit in chemical 
reaction.  
Q3:  What are acidic and basic radicals?  
A3:  Radicals caring positive charge are called basic radicals and those carrying negative charge are called acidic 
radicals.   
Q4:  What type of bond is present in an inorganic salt? 
A4 : Electrovalent type of bond is present in an inorganic salt.  
Q5:  Name the acid radicals detected with dil. H
2
 SO
4
? 
A5:  CO
3
2-
, S
2-
, SO
3
2-
, NO
2
-
 
Q6: Name the acid radicals detected by Conc., H
2
SO
4
 
A6: Cl
-
, Br
-
, I
-
, NO
3
, CH
3
COO
-
 
Q7: Name the radicals which are tested with the help of sodium carbonate extract? 
A7: S
2-
, Cl
-
, Br
-
, I
-
,  PO
4
3-
, SO
4
2-
, SO
3
2-
 
Q8: Name the radical which produce CO
2
 on heating. 
A8: Carbonate.  
Q9: Name the salts which produce crackling sound when heated? 
A9: Lead nitrate, Barium nitrate, Potassium bromide, Sodium chloride.  
Q10: What is lime water? 
A10:  Solution of Ca(OH)
2
 in water is called lime water.  
 
                                                                
 
 
 
 
 
 
 
 
Title of the practical: To determine the percentage of copper in a given sample of brass. 
 
Q1: What is brass.  
A1: Brass is an alloy of copper and zinc.  
Q2: Give the chemical composition of brass. 
A2: The composition of the brass is Copper (60 to 80 %) and Zinc (20 to 40%) along with small amount of lead      ( 0-2%)  
tin ( 0 to 6%) and Iron (0-1%).  
Q3: What is normality? 
A3: The fraction of gram equivalent of the substance dissolved per litre of the  solution is known as normality.  
Q4: What is standard solution? 
A4: Standard solution is that whose strength is known. 
Q5: By which method we determine the percentage of copper? 
A5: We determine the percentage of copper by iodometrically. 
Q6: What is Iodometric Titration?  
A6: Volumetric analysis in which iodine is liberated during a chemical reaction from KI is known as iodometric Titration.  
Q7: What is titration.  
A7: Titration is a process in which the concentration of unknown solution is determined with the help of a standard solution 
and indicator.  
A8: Titration is mainly of four type:- 
(i) Acidimetry and alkalimetry. (ii) Redox titration. 
(iii) Iodometry and iodimetry.   (iv)    Precipitation.  
 
Q9: What is end point? 
A9: When the reaction of two solution is completed that  point is known as end point.   
Q10: 10 Give the types of indicators. 
A10: Indicators of three types:- 
i) Internal indicator 
ii) External indicator 
iii) Self indicator. 
 
 
 
 
 
 
 
 
 
 
Title of the practical: To determine the percentage of iron in a iron salt by redox titration. 
 
Q1: What are  redox titration?  
A1: Reactions which involve simultaneous oxidation and reduction are called redox reactions and the titration 
involving redox reactions are called redox titration.  
Q2: What is self indicators? 
A3:. When one of the reactants itself acts as indicator and no external substance is required to indicate the end point 
of titration.  
Q3: What is permangnometry? 
A3: Redox titrations involving KMnO
4
 as the oxidizing agent are called permagnometry.  
Q4: Why KMnO
4 
solution is kept in dark or coloured bottle.  
A4: Because in presence of sunlight, KMnO
4 
disintegrates.  
Q5: In which terms we express the percentage of Iron? 
A5: Percentage of Iron is expressed in terms of grams.  
Q6: What is titration? 
A6: The process of adding one solution from the burette to another in the titration flask in order to complete the 
chemical reaction involved is known as titration.  
Q7: What is indicator?  
A7: Indicator is a chemical substance which changes colour at the end point. 
Q8: What is end point? 
A8: The stage during titration at which the reaction is just complete is known as the end point of titration.  
Q9: What is acidimetry and alkalimetry? 
A9: It is the branch of volumetric analysis involving chemical reaction between an acid and a base.  
Q10: Why the last drop of solution must not be blown out of a pipette? 
A10: Since the drops left in the jet and is extra of the volume measured by the pipette.  
 
 
 
 
 
 
 
 
 
 
 
 
Title of the practical: Measurement of pH of different solutions. 
Q1: What is pH? 
A1: The pH of a solution is the negative logarithm of the hydrogen ion concentration.  
 pH = log
10
 (H
+
)  
Q2: What is the effect of temperature on pH? 
A2: The pH value of the solution increases with increase of temperature.  
 
Q3: What is the pH of pure water at 25
0
C? 
A3: 7 
Q4: What is effect of dilution on pH of an acidic solution?  
A4: pH increases toward 7. 
Q5: What does pH of a solution signify? 
A5: It signifies the H
3
O+ ion concentration in moles per litre.  
Q6: What does pH of a solution if it is acidic? 
A6: pH of an acidic solution is less than 7. 
Q7: What is an acid-base indicator? 
A7: An acid-base indicator is an organic compound which changes its colour within certain pH range. 
Q8: What is ionic product of water? 
A8: Kw = [H
3
O
+
] [OH
-
] 
Q9: What do you mean by universal indicator? 
A9: It is a mixture of several indicators having different pH ranges.  
Q10: Does addition of a salt having a common Ion on to weak acid change the pH of the solution? 
A10:  Yes, the change the pH of solution increases.  
 
 
 
 
 
 
 
 
 
 
 
 
Page 5


Model Viva Questions Chemistry Lab 
Common to : CS, IT, ET  1
st
 Sem 
Title of the practical: Identification of two cations and two anions in a sample of mixture. 
 
Q1: What is qualitative analysis? 
A1: The type of analysis that deals with the methods which are used to determine the constituents of a compound.  
Q2: What is a radical? 
A3: A radical may be defined as an atom or group of atoms which carries charge and behaves as a single unit in chemical 
reaction.  
Q3:  What are acidic and basic radicals?  
A3:  Radicals caring positive charge are called basic radicals and those carrying negative charge are called acidic 
radicals.   
Q4:  What type of bond is present in an inorganic salt? 
A4 : Electrovalent type of bond is present in an inorganic salt.  
Q5:  Name the acid radicals detected with dil. H
2
 SO
4
? 
A5:  CO
3
2-
, S
2-
, SO
3
2-
, NO
2
-
 
Q6: Name the acid radicals detected by Conc., H
2
SO
4
 
A6: Cl
-
, Br
-
, I
-
, NO
3
, CH
3
COO
-
 
Q7: Name the radicals which are tested with the help of sodium carbonate extract? 
A7: S
2-
, Cl
-
, Br
-
, I
-
,  PO
4
3-
, SO
4
2-
, SO
3
2-
 
Q8: Name the radical which produce CO
2
 on heating. 
A8: Carbonate.  
Q9: Name the salts which produce crackling sound when heated? 
A9: Lead nitrate, Barium nitrate, Potassium bromide, Sodium chloride.  
Q10: What is lime water? 
A10:  Solution of Ca(OH)
2
 in water is called lime water.  
 
                                                                
 
 
 
 
 
 
 
 
Title of the practical: To determine the percentage of copper in a given sample of brass. 
 
Q1: What is brass.  
A1: Brass is an alloy of copper and zinc.  
Q2: Give the chemical composition of brass. 
A2: The composition of the brass is Copper (60 to 80 %) and Zinc (20 to 40%) along with small amount of lead      ( 0-2%)  
tin ( 0 to 6%) and Iron (0-1%).  
Q3: What is normality? 
A3: The fraction of gram equivalent of the substance dissolved per litre of the  solution is known as normality.  
Q4: What is standard solution? 
A4: Standard solution is that whose strength is known. 
Q5: By which method we determine the percentage of copper? 
A5: We determine the percentage of copper by iodometrically. 
Q6: What is Iodometric Titration?  
A6: Volumetric analysis in which iodine is liberated during a chemical reaction from KI is known as iodometric Titration.  
Q7: What is titration.  
A7: Titration is a process in which the concentration of unknown solution is determined with the help of a standard solution 
and indicator.  
A8: Titration is mainly of four type:- 
(i) Acidimetry and alkalimetry. (ii) Redox titration. 
(iii) Iodometry and iodimetry.   (iv)    Precipitation.  
 
Q9: What is end point? 
A9: When the reaction of two solution is completed that  point is known as end point.   
Q10: 10 Give the types of indicators. 
A10: Indicators of three types:- 
i) Internal indicator 
ii) External indicator 
iii) Self indicator. 
 
 
 
 
 
 
 
 
 
 
Title of the practical: To determine the percentage of iron in a iron salt by redox titration. 
 
Q1: What are  redox titration?  
A1: Reactions which involve simultaneous oxidation and reduction are called redox reactions and the titration 
involving redox reactions are called redox titration.  
Q2: What is self indicators? 
A3:. When one of the reactants itself acts as indicator and no external substance is required to indicate the end point 
of titration.  
Q3: What is permangnometry? 
A3: Redox titrations involving KMnO
4
 as the oxidizing agent are called permagnometry.  
Q4: Why KMnO
4 
solution is kept in dark or coloured bottle.  
A4: Because in presence of sunlight, KMnO
4 
disintegrates.  
Q5: In which terms we express the percentage of Iron? 
A5: Percentage of Iron is expressed in terms of grams.  
Q6: What is titration? 
A6: The process of adding one solution from the burette to another in the titration flask in order to complete the 
chemical reaction involved is known as titration.  
Q7: What is indicator?  
A7: Indicator is a chemical substance which changes colour at the end point. 
Q8: What is end point? 
A8: The stage during titration at which the reaction is just complete is known as the end point of titration.  
Q9: What is acidimetry and alkalimetry? 
A9: It is the branch of volumetric analysis involving chemical reaction between an acid and a base.  
Q10: Why the last drop of solution must not be blown out of a pipette? 
A10: Since the drops left in the jet and is extra of the volume measured by the pipette.  
 
 
 
 
 
 
 
 
 
 
 
 
Title of the practical: Measurement of pH of different solutions. 
Q1: What is pH? 
A1: The pH of a solution is the negative logarithm of the hydrogen ion concentration.  
 pH = log
10
 (H
+
)  
Q2: What is the effect of temperature on pH? 
A2: The pH value of the solution increases with increase of temperature.  
 
Q3: What is the pH of pure water at 25
0
C? 
A3: 7 
Q4: What is effect of dilution on pH of an acidic solution?  
A4: pH increases toward 7. 
Q5: What does pH of a solution signify? 
A5: It signifies the H
3
O+ ion concentration in moles per litre.  
Q6: What does pH of a solution if it is acidic? 
A6: pH of an acidic solution is less than 7. 
Q7: What is an acid-base indicator? 
A7: An acid-base indicator is an organic compound which changes its colour within certain pH range. 
Q8: What is ionic product of water? 
A8: Kw = [H
3
O
+
] [OH
-
] 
Q9: What do you mean by universal indicator? 
A9: It is a mixture of several indicators having different pH ranges.  
Q10: Does addition of a salt having a common Ion on to weak acid change the pH of the solution? 
A10:  Yes, the change the pH of solution increases.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Title of the practical: To find out the hardness of water by EDTA method. 
Q1: What is the trade name of EDTA?  
A1: Ethylene diamine Tetra Acetic Acid. (EDTA). 
Q2: What is hardness of Water? 
A2: The property of water which restricts or checks the lather formation with soap is called hardness.  
Q3: What is temporary or carbonate hardness? 
A3: It is caused by the presence of carbonate , mainly bicarbonates of calcium and magnesium.  
Q4:  What is permanent or non carbonate hardness?  
A4: It is caused by chlorides and sulphates of calcium and magnesium. 
Q5: Which indicator is employed in EDTA titrations  
A5: Erio Chrome Black – T is used in EDTA titration.  
 Q6 What are complexometric Titration?  
A6: Titrations depending upon the combination of ions, other than H+ or OH
–ions
, to form a soluble slightly dissociated 
ion or compound are called complexometric titration.  
Q7 Name the most important complexing agent employed in complexometric titration. 
A7: Ethylence diamine tetra acetic acid. (EDTA).  
Q8. How the equivalence point is detected in complexometric titration?  
A8: The equivalence point is indicated by the use of metal ion indicator such as Erio Chrome Black-T. 
Q9 Which type of Ligand is EDTA?  
A9: It serves as a hexadentate ligand and act as a chelating agent.  
Q10. What is a buffer solution?  
A10: A buffer solution is defined as solution which resists in its pH value even when small amount of the acid or base 
are added to it. 
 
 
 
 
 
 
 
 
 
 
 
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