Question

Standard solution of $ KNO_{3} $ is used to make salt bridge because

• A. velocity of $ K^{+} $ is greater than $ NO_{3}^{-} $
• B. velocity of $ NO_{3}^{-} $ is greater than $ K^{+} $
• C. velocity of $ K^{+} $ and $ NO_{3}^{-} $ are same
• D. $ KNO_{3} $ is highly soluble in water

Answer 1

Answer: (C)

In salt bridge, only those electrolytes are used cations and anions of which are of same ionic mobility. $ KCl, $ $ NH_{4}NO_{3} $ and $ KNO_{3} $ due to same mobility of cation and anion are used in salt bridge.