When a student added Zinc granules to dilute HCI, a colorless and odorless gas was evolved, which was tested with a burning match stick, it was observed that:
(a) The match stick continued to burn brilliantly.
(b) The match stick burnt slowly with a blue flame.
(c) The match stick extinguished and the gas burnt with pop sound.
(d) The match stick burnt with an orange flame.
Please help me my answer is c. AM I right???
c, yes. Hydrogen gas
Zn+2HCl>>ZnCl2 + H2
Thanks
To determine the correct answer, let's analyze the given information. When zinc granules are added to dilute hydrochloric acid (HCI), a colorless and odorless gas is evolved. The gas is then tested with a burning match stick.
(a) If the match stick continues to burn brilliantly, it indicates that the gas produced is not affecting the combustion of the match stick. In this case, the gas is most likely hydrogen (H2), which supports combustion.
(b) If the match stick burns slowly with a blue flame, it suggests the presence of a gas such as carbon dioxide (CO2). Carbon dioxide does not support combustion, resulting in a slower burn.
(c) If the match stick extinguishes and the gas burns with a pop sound, it indicates the presence of hydrogen gas (H2). Hydrogen gas is highly flammable and burns explosively with a "pop" sound, but it does not support the combustion of the match stick.
(d) If the match stick burns with an orange flame, this does not align with any of the gases typically produced during the reaction of zinc granules with hydrochloric acid.
Given the information, option (c) seems to be the most suitable answer. So, your answer is correct. Well done!