Instrumentation Analytical chemistry, Exercises of Chemical Instrumentation and Analysis

Download Instrumentation Analytical chemistry and more Exercises Chemical Instrumentation and Analysis in PDF only on Docsity!

Question 1 Which of the following is the formula far pH calculation? a) logio[H*] b) -logio[H*] c) loge[H*]. d) -loge[H*). Question 2 Pure water is known to be which of the following? a) Weak electrolyte b) Strong electrolyte c) Neither weak nor strong d) Notan electrolyte Question 3 Which of the following is the value of hydrogen ion concentration of pure water? a) 1x10’ moles/litre b) 110° moles/litre c) 1*10° moles/litre d) 1*10* moles/litre Question 4 Which of the following is the value of hydroxyl ion concentration of pure water? a) 1*107 moles/litre b) 1*105 moles/litre c) 1*106 moles/litre d) 1x108 moles/litre Question 5 Which of the following is the relation between hydrogen and hydroxyl ion concentration of pure water? a) Value of hydrogen ion concentration is greater b) Value of hydroxyl ion concentration is greater c) They are both always the same d) The concentrations keep changing Question 6 The Nernst equation is given by which of the following statements? a) E+Eo + 2.303 RT/F log CH b) E+Eo— 2.303 RT/F log CH d + 2.303 RTF log CH d) E+E, — 2.303 RTxF log CH Question 7 Which of the follawing is the relation between concentration of hydrogen and hydroxyl ions in an acidic solution? a) Value of hydrogen ion concentration is greater b) Value of hydroxyl ion concentration is greater c) They are both always the same d) The concentrations keep changing Question 8 Which of the following is the relation between concentration of hydrogen and hydroxyl ions in a basic solution? a) Value of hydrogen ion concentration is greater b) Value of hydroxyl ion concentration is greater c) They are both always the same d) The concentrations keep changing Question 9 The measurement of hydrogen ion concentration can be made by measuring the potential developed in an electrochemical cell. a) True b) False Question 10 Slope factor is independent of temperature. a) True b) False Question 11 Which of the following is not the characteristic of a reference electrode? a) It must have a known output potential b) It must have a constant output potential c) Its output potential is dependent on the composi of the solution d) Itis employed in conjunction with the indicator or working electrode Question 12 Why is Standard hydrogen electrode called as the primary reference electrode? a) It has a known output potential b) It has a constant output potential c) Its output potential is independent of the composition of the solution d) Its output potential is zero volts Question 13 Which of the following is the simple and most convenient hydrogen electrode? a) Pascal Hydrogen electrode b) Bourne Hydrogen electrode Cc) Hilderbant Hydrogen electrode d) West Hydrogen electrode