Question:
Back‐titration method is used for
A. Volatile substances
B. Insoluble substances
C. Substances for which a quantitative reaction proceeds rapidly only in the presence of excess of the reagent
D. Substances that require heating with a volumetric reagent during the determination, in which decomposition or loss of the reactants would occur in the process
Choose the correct answer from the options given below:
Back‐titration method is used for
A. Volatile substances
B. Insoluble substances
C. Substances for which a quantitative reaction proceeds rapidly only in the presence of excess of the reagent
D. Substances that require heating with a volumetric reagent during the determination, in which decomposition or loss of the reactants would occur in the process
Choose the correct answer from the options given below:
A. Volatile substances
B. Insoluble substances
C. Substances for which a quantitative reaction proceeds rapidly only in the presence of excess of the reagent
D. Substances that require heating with a volumetric reagent during the determination, in which decomposition or loss of the reactants would occur in the process
Choose the correct answer from the options given below:
Updated On: Feb 24, 2026
- A only
- A and C
- A, B and D
- A, B, C and D
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
The question concerns the suitability of using the back-titration method for various types of substances. Let's examine each option to understand why all are correct for back-titration and justify the correct answer, which is A, B, C, and D.
-
Volatile Substances (Option A):
- For volatile substances, direct titration may not be feasible because the substance can evaporate during the process, leading to inaccurate results. Back-titration is suitable as it involves an excess of a reagent which is then titrated, thus minimizing the loss due to volatility.
-
Insoluble Substances (Option B):
- When dealing with insoluble substances, direct titration is ineffective since they do not dissolve completely to react with the titrant. Back-titration allows these substances to react with an excess reagent that can then be titrated, ensuring accurate measurement.
-
Substances for Rapid Reaction Only in Excess Reagent (Option C):
- Certain substances may not react completely or quickly with the titrant unless in an excess quantity. Back-titration allows the use of excess reagent, confirming that the reaction proceeds to completion before titration.
-
Substances Requiring Heating With Reagent (Option D):
- Some substances need heating, which could cause decomposition or loss during determination. Back-titration ensures the reaction occurs under controlled conditions, reducing the chance of these issues.
Thus, all options A, B, C, and D are correctly addressed by the back-titration method, making this the correct choice.
Was this answer helpful?
0
0
Top GPAT Pharmaceutical Analysis Questions
- Isobutane upon bromination under the influence of ultraviolet light at 127 °C affords the following major product:
- Phenol upon treatment with bromine in the presence of carbondisulphide at 0 °C yields:
The major product formed in the above‐given Knorr synthesis is:- Potential at the equivalence point for a redox reaction
\(\mathrm{aOX1} + \mathrm{bRED2} \rightleftharpoons \mathrm{bOX2} + \mathrm{aRED1}\)
is given by the equation: - Benzene theoretically can have ____ number of possible fundamental absorption bonds in the IR spectrum
View More Questions
Top GPAT Precipitation titrations Questions
- According to Mohr method, the silver nitrate solution can be standardized against primary‐ standard grade:
- Which of the following pair of volujmetric method of argentometric titration and indicator used is matched correctly
(1) Fajan's Method Chromate (2) Mohr's method Fluroescein (3) Vohlard's method Ferric salt
The method and indicator matches correctly_____
- Nitrostat® is an example of:
- Nitrostat® is an example of:
- The standard redox potential of MnO4– / Mn+2 systems is
Top GPAT Questions
- Match the symbols in the List I with the terms used in the List II of conductance measurements, and
List I
SymbolsList II
TermsA \(\Omega^{-1}\) I Specific conductance B \(∧\) II Electrical conductance C k III Specific resistance D \(\rho\) IV Equivalent conductance
Choose the correct answer from the options given below: - Cottrell’s method is used for the measurement of:
- Match the statements in List I with their correct answers in List II, respectively, in respect to modified 1st law of thermodynamics, and
List I
List II
A Constant heat (q = 0) I Isothermal B Reversible process at constant temperature (dT = 0) II Isometric C Constant volume (dV = 0) III Adiabatic D Constant pressure (dP = 0) IV Isobar
Choose the correct answer from the options given below: - Boric acid with molecular weight 61.83 was partitioned between water and amyl alcohol at 25 °C. The amount of boric acid was determined to be 0.24 g in 250 ml of amyl alcohol and 0.32 g in 100 ml water. The partition coefficient of boric acid between water and amyl alcohol, when calculated at molar concentration for each of the solution, is:
- Drugs ‘A’, ‘B’ and ‘C’ follow zero order, first order and second order degradation kinetics, respectively, but have the same rate constant. Which of the following statement is true in this respect:
View More Questions