Which of the following combination will produce H 2 gas-A- F e metal and conc- HNO 3B- Cu metal and conc- HNO 3C- Zn metal and N aOH aq-D- Au metal and N aCN aq- in the presence of air

The correct option is C Zn metal and NaOH(aq.)Zn+2NaOH → Na_2ZnO_2+H_2 ↑ ...

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Abundance and Isotopes

Which of the ...

Question

Which of the following combination will produce $H_{2}$ gas?

F e

metal and conc.

H N O_{3}

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C u

metal and conc.

H N O_{3}

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Z n

metal and

N a O H

(aq.)

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A u

metal and

N a C N

(aq.) in the presence of air

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H_{2}

H_{2}

(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

M

H {N O}_{3}

H_{2} {S O}_{4}

N a O H

K O H

M {C l}_{3}

M

M

H N O_{3}, c o n c . H_{2} S O_{4}

N a O H, K O H

M C l_{3}

M

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