To dissolve in water, zinc (zn) should form a compound with a. chloride (ci– ). b. carbonate (co32–). c. hydroxide (oh– ). d. phosphate (po43–).

Answer : The correct option is, (C) hydroxide

Explanation :

According to the question, when zinc is dissolve in water then it will form zinc hydroxide and hydrogen gas a product. As we know that zinc is a metal which react with an anion to to a compound.

The balanced chemical reaction will be,

By the stoichiometry we can say that 1 mole of zinc react with 2 moles of water to give 1 mole of zinc hydroxide and 1 mole of hydrogen gas.

Hence, to dissolve in water, zinc (Zn) should form a compound with hydroxide ion

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