Question

what happens if few pieces of granulated zinc is warmed with 5ml of NaOH solution taken in a test tube? write your observations and also write the relevant chemical equations​

Answer 1

Answer:

Zn reacts with NaOH to form a coordination compound called sodium zincate with evolution of hydrogen gas

Answer 2

Answer:

Formation of Hydrogen Gas.

Explanation:

When mixing Zn granules with an aqueous solution of NaOH we get the formation of hydrogen dioxide gas. When Zn reacts NaOH it produces “Sodium Zincate and Hydrogen gas”.  

$2 \mathrm{NaOH}+\mathrm{Zn} \rightarrow \mathrm{Na}_{2} \mathrm{ZnO}_{2}+\mathrm{H}_{2}$

When the metal Zn reacts with NaOH it gives silver coloured sodium zincate along with Hydrogen gas which can be tested by pop test.

Hence, when 5 ml of aqueous sodium hydroxide solution is mixed with Zn granules it reacts to give sodium Zincate which is also in aqueous state and hydrogen gas.