of the following metals is the least reactive? A. Pb B. Ca C. Cu D. Au 21. Which of the following metals is more reactive based on the reaction: Rb+Fe(NO_(3))_(2)arrow Rxn A. Rb B. Fe C. NO_(3) D. Fe(NO_(3))_(2) 2. Which of the following metals is more reactive based on the reaction: ScSO_(4)+Nbarrow NoRxn A. Nb B. Sc C. SO_(4) D. ScSO_(4) Determine whether the following reaction will occur: Pb(OH)_(2)+Niarrow A. Rxn will occur B. Rxn will not occur etermine whether the following reaction will occur and if it will, p Ag+Sn(NO_(3))_(2)arrow A. Rxn will not occur B. Rxn will occur; AgSn+NO_(3) C. Rxn will occur; Ag(NO_(3))_(2)+Sn D. Rxn will occur; AgNO_(3)+Sn

1. The least reactive metal among the options is Au (Gold). Gold is a noble metal and is known for its low reactivity.2. In the reaction , Rb (Rubidium) is more reactive. This is because Rubidium is an alkali metal and is more reactive than transition metals like Iron (Fe).3. In the reaction , Nb (Niobium) is more reactive. This is because Niobium is a transition metal and is more reactive than Scandium (Sc).4. The reaction will not occur. This is because Lead (Pb) is less reactive than Nickel (Ni), so Nickel cannot displace Lead from its compound.5. The reaction will occur. This is because Silver (Ag) is less reactive than Tin (Sn), so Silver can displace Tin from its compound. The products of the reaction will be .