What is Tollen's reagent? Write the chemical equation of the reaction of aldehyde with Tollen's reagent.
Tollen's test is used to distinguish aldehydes from ketones as only aldehydes undergo oxidation.
Step 1: Definition:
Tollen's reagent is an ammoniacal silver nitrate solution that oxidizes aldehydes to carboxylates, forming a silver mirror.
Step 2: Reaction: \[ R-CHO + 2[Ag(NH_3)_2]^+ + 3OH^- \rightarrow R-COO^- + 2Ag + 4NH_3 + H_2O \]
Match List I with List II:
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Match List I with List II:
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Which of the following statements are true?
A. Unlike Ga that has a very high melting point, Cs has a very low melting point.
B. On Pauling scale, the electronegativity values of N and C are not the same.
C. $Ar, K^{+}, Cl^{–}, Ca^{2+} and S^{2–}$ are all isoelectronic species.
D. The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is Si $>$ Al $>$ Mg $>$ Na.
E. The atomic radius of Cs is greater than that of Li and Rb.
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