Question

Which of the following metals will react with $$NaOH$$  and $$KOH$$  to liberate hydrogen gas?

A. $$Zn,Al,Fe{\text{ and }}Mg$$
B. $$Al,Fe,Mg{\text{ and }}Sn$$
C. $$Zn,Sn{\text{ and }}Al$$  
D. $$Fe,Mg{\text{ and }}Al$$
Answer :   $$Zn,Sn{\text{ and }}Al$$
Solution :
\[2Al+2NaOH+2{{H}_{2}}O\xrightarrow{\Delta }\]      \[2NaAl{{O}_{2}}+3{{H}_{2}}\]
\[Sn+2NaOH+{{H}_{2}}O\xrightarrow{\Delta }\]      \[N{{a}_{2}}Sn{{O}_{3}}+2{{H}_{2}}\]
\[Zn+2NaOH\xrightarrow{\Delta }\]    \[N{{a}_{2}}Zn{{O}_{2}}+{{H}_{2}}\]

Releted MCQ Question on
Inorganic Chemistry >> Hydrogen

Releted Question 1

$$HCl$$  is added to following oxides. Which one would give $${H_2}{O_2}$$ ?

A. $$Mn{O_2}$$
B. $$Pb{O_2}$$
C. $$Ba{O_2}.8{H_2}O$$
D. $$N{O_2}$$
Releted Question 2

Heavy water is

A. $${H_2}{}^{18}O$$
B. water obtained by repeated distillation
C. $${D_2}O$$
D. water at $${4^ \circ }C$$
Releted Question 3

The oxide that gives hydrogen peroxide on treatment with a dilute acid is :

A. $$Pb{O_2}$$
B. $$N{a_2}{O_2}$$
C. $$Mn{O_2}$$
D. $$Ti{O_2}$$
Releted Question 4

Hydrogen gas will not reduce :

A. heated cupric oxide
B. heated ferric oxide
C. heated stannic oxide
D. heated aluminium oxide

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Hydrogen


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