परिकल्पना की अवधारणा पर चर्चा कीजिए तथा इसके निर्माण में प्रमुख मुद्दों को उजागर कीजिए।
See Answer →Explain why (n, y) reaction is most suited for NAA.
See Answer →In what respects nuclear reactions are different from chemical reactions? Calculate Q value of the reaction 63Cu = (η, γ) 64 Cu. Give that Cu = 62.929590, Cu = 64, 63.929760, n =1.008665 amu.
See Answer →Describe various types of neutron sources available for NAA. Which one of these is most suitable for trace element analysis?
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Explain the basic principle of Differential Scanning Calorimetry (DSC). Draw a block diagram of DSC instrument.
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Draw a labelled diagram of the TG curve obtained by heating a mixture of 50 mg of calcium oxalate monohydrate and 50 mg of barium oxalate monohydrate to 1200°C. Calculate the amount of all mass losses.
See Answer →List the factors affecting TG curve. Taking a suitable example, explain the effect of furnace atmosphere on TG curve.
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What are amperometric titrations? Draw common types of curves obtained in amperometric titrations. Briefly discuss their experimental set up.
See Answer →Explain the terms limiting current, migration current, diffusion current, residual current and half wave potential.
See Answer →Enlist various voltammetric methods of analysis. Write briefly about anodic stripping voltammetry(ASV) and its usefulness for trace elemental analysis.
See Answer →Describe the design and principle of constant current coulometry. Write three main applications of coulometric titrations.
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The conductivity of 0.001028 M acetic acid is 4.95 × 105 S cm²¹. Calculate its dissociation constant if the limited molar conductivity for acetic acid is 390.5Scm² mol¹.
See Answer →Explain how will you determine dissociation constant of a weak acid or base by conductometric method.
See Answer →A solution of CuSO4 is electrolysed for 10 minutes with a current of 1.5 amperes. What is the mass of copper deposited at the cathode?
See Answer →How will you analyse a binary alloy of copper and silver thermogravimetrically.
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