Draw a DTA Curve for CaC₂O₄·H₂O. Give the interpretations of different peaks exist in the thermogram. 

An impure sample of CaC₂O₄·H₂O is analyzed using TGA technique. TG Cure of the sample indicates the total mass change from 85 mg to 30.7 mg when this sample was healed up to 900° C. Calculate the % purity of the sample. 

 List the advantages of DTA and DSC over TGA. 

How would you analyze a mixture of Ca, Sr, and Ba oxalates using thermogravimetry? Draw a thermogram for the decomposition of Ca, Sr and Ba oxalates.

How would you analyze a mixture of Ca, Sr, and Ba oxalates using thermogravimetry? Draw a thermogram for the decomposition of Ca, Sr and Ba oxalates.

Conductivity of 1.6 × 10⁻² mol dm⁻³ acetic acid is 0.0215 S m⁻¹. Calculate the degrees of dissociation and the dissociation constant of acetic acid. You may consult Table 4.2 for the limiting ionic conductivities of the hydrogen and acetate ion. 

Calculate the amount of Co (II) deposited on the surface of a cathode, if a constant current of 0.96 A for 28.4 minutes is passed through solution of Co (II). Assume that current efficiency is 90%. 

Write the advantages of coulometric titrations. 

Write the advantages of coulometric titrations. 

 A solution of Zn is electrolyzed for 30 s using a current of 1.0 mA. Calculate the mass of Zn plated on the electrode for the electrochemical reaction:
Zn²⁺ + 2e⁻ → Zn 

Describe concentration polarization. Give the importance of overvoltage. 

Give two applications of ion selective electrodes. 

Give two applications of ion selective electrodes. 

Discuss the factors which limit the accuracy of pH measurements. 

Discuss the factors which limit the accuracy of pH measurements. 

 At 298 K, the limited molar conductivities at infinite dilution of sodium benzoate, hydrochloric acid and sodium chloride are 8.24 × 10⁻³ S m² mol⁻¹, 4.26 × 10⁻² S m² mol⁻¹ and 1.26 × 10⁻² S m² mol⁻¹, respectively. Calculate the limiting molar conductivity of aqueous benzoic acid. 

 At 298 K, the limited molar conductivities at infinite dilution of sodium benzoate, hydrochloric acid and sodium chloride are 8.24 × 10⁻³ S m² mol⁻¹, 4.26 × 10⁻² S m² mol⁻¹ and 1.26 × 10⁻² S m² mol⁻¹, respectively. Calculate the limiting molar conductivity of aqueous benzoic acid. 

How is the conductance varied with concentration? Explain with the help of suitable examples. 

How is the conductance varied with concentration? Explain with the help of suitable examples. 

 Calculate the potential of the cell given below
Cu|Cu²⁺ (0.010 M)||Ag⁺|Ag(0.10M) 

Hint: use Appendix I for the standard electrode potential values.