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Which of the following is Tollen’s reagent?

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in Chemistry – Class 12 by (188k points)
Which of the following is Tollen’s reagent?

(a) Ammoniacal silver nitrate solution

(b) Aqueous copper sulphate

(c) Alkaline sodium potassium tartarate

(d) Mixture of sodium carbonate, sodium citrate and Cu^2+ complex

The question was posed to me during an interview.

My doubt stems from Aldehydes and Ketones Chemical Reactions in section Aldehydes, Ketones and Carboxylic Acids of Chemistry – Class 12

1 Answer

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The correct option is (a) Ammoniacal silver nitrate solution

Easy explanation: Tollen’s reagent is prepared by adding ammonium hydroxide solution to silver nitrate solution till the grey precipitate of Ag2O first formed just gets dissolved.

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