Which one among the following reactants produces hydrogen?

Z n + H C I

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{B a O}_{2} + H C I

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K_{2} S_{2} O_{8} + H_{2} O

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{N a}_{2} O_{2} + H C I

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Solution

The correct option is A $Z n + H C I$
$Z n + 2 H C I \to Z n C I_{2} + H_{2}$

$B a O_{2} + 4 H C I \to B a C I_{4} + 2 H_{2} O$

$K_{2} S_{2} O_{8} + 2 H_{2} O \to 2 H_{2} S_{2} O_{8} + 2 K O H$

$N_{2} a_{2} O_{2} + 2 H C I \to 2 N a C I + H_{2} O + \frac{1}{2} O_{2}$

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Similar questions

Balance the following equations :

(a) $N_{2} + H_{2} \to N H_{3}$

(b) $H_{2} + O_{2} \to H_{2} O$

(d) $C O + O_{2} \to C O_{2}$

(e) $Z n + H C I \to Z n C l_{2} + H_{2}$

C H_{3} C O C H_{3}

Z n - H C I / c o n c H C I ⟶

C H_{3} C H_{2} N H_{2} + C H C l_{3} + a l c . K O H \to

C_{6} H_{5} N_{2}^{+} C l^{-} H_{2} O - -------- \to (Room Temp.)

S b C l_{3} + K I O_{3} + H C I \to S b C l_{5} + I C l + H_{2} O + K C l

H_{2}

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