Hydrochloric acid is taken in a test tube and a piece of zinc metal is put into it. The collected gas evolved in the test tube is tested by bringing it near the burning matchstick. |
(a) Which is the gas evolved in the test tube after the reaction? |
(b) What happened to the burning matchstick when it is brought near to the mouth of the test tube. |
Answer:
(a) The reaction takes place is \[\begin{align} & \operatorname{HCI}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,+\,\,\,\,Zn\,\,\,\,\,\xrightarrow{{}}\,\,\,\,ZnC{{I}_{2\,\,}}\,\,\,\,\,\,\,\,\,+\,\,\,\,{{H}_{2}}\uparrow \\ & \operatorname{Hydrochloric}\,\,\,\,\,\,\,Zinc\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Zinc\,Choride\,\,\,\,\,\,Hydrogen \\ \end{align}\] The gas evolved is hydrogen gas\[{{\operatorname{H}}_{2}}\]. (b) As we know that \[{{\operatorname{H}}_{2}}\]is a combustible gas, so when the burning matchstick is brought near the mouth of the test tube containing hydrogen gas, it produces a pop up sound.
You need to login to perform this action.
You will be redirected in
3 sec