John takes some zinc granules in a test tube and adds some hydrochloric acid to it. On taking a burning matchstick near the mouth of this this test tube, he hears a pop sound. Which gas is released during this reaction
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Answer:
When zinc is added in sodium solution sodium zincate (Na
2
ZnO
2
) is formed along with hydrogen gas.
2NaOH+Zn→Na
2
ZnO
2
+H
2
When burning splint is held near the evolved it continues burning with pop sound indicating evolution of Hydrogen gas.
Same metal i.e Zn reacts with strong acid H
2
SO
4
to give ZnSO
4
Zn+H
2
SO
4
→ZnSO
4
+H
2
↑
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