How many of the following combinations will produce H2 gas?(a) Cu met – InterviewSolution

1.	How many of the following combinations will produce H2 gas?(a) Cu metal and concentrated HNO3(b) Au metal and NaCN in the presence of air(c) Zn metal and NaOH(aq)(d) Zn metal and dilute HNO3(e) Solid carbon and steam at high temperature
Answer» How many of the following combinations will produce $H_{2}$ gas? $(a) Cu metal and concentrated H N O_{3} (b) Au metal and NaCN in the presence of air (c) Zn metal and NaOH(aq) (d) Zn metal and dilute H N O_{3} (e) Solid carbon and steam at high temperature$

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