Question

2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a
test tube. When the contents are warmed, a gas evolves which is bubbled through a soap solution
before testing. Write the equation of the chemical reaction involved and the test to detect the gas.
Name the gas which will be evolved when the same metal reacts with dilute solution of a strong
acid.​

Answer 1

Answer:

heat

NaOH+Zn---------> Na2ZnO2 + H2(g)

Hydrogen gas is evolved.

When this gas is passed the soap solution, it will produce bubbles and when brought near a burning ️ candle, will give ' pop- up sound'.

Zn + HCl ------------> ZnCl2 + H2