Transition and InnerTransition Elements - Result Question 89

####16. Which of the following combination will produce H2 gas?

(2017 Adv.)

(a) Fe metal and conc. HNO3

(b) Cu metal and conc. HNO3

(c) Au metal and NaCN(aq) in the presence of air

(d) Zn metal and NaOH(aq)

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Solution:

  1. Zn Amphoteric +2NaOHNa2ZnO2+H2


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