Question

Complete the following reactions,

(i) $H _{2}( g )+ MnO ( s ) \stackrel{\Delta}{\rightarrow} Mn ( s )+ H _{2} O ( g )$

(ii) $CO ( g )+ H _{2}( g ) \frac{\Delta}{\text { Catalyst }}$

(iii) $C _{3} H _{8}( g )+3 H _{2} O ( g ) \frac{\Delta}{\text { Catalyst }}$

(iv) $Zn ( s )+ NaOH ( aq ) \stackrel{\text { Heat }}{\longrightarrow }$

After completing the above reactions in the

balanced equations the coefficient for $H _{2}( g )$ may

be

• A. 1, 2, 7, 1
• B. 1, 2, 4, 2
• C. 1, 2, 1, 1
• D. 1, 3, 4, 2

Answer 1

Answer: (A)

Complete the following reactions,

(i) $H_{2}(g)+M n O(s) \stackrel{\Delta}{\rightarrow} M n(s)+H_{2} O(g)$

(ii) $C O(g)+H_{2}(g) \frac{\Delta}{\text { Catalyst }}$

(iii) $C_{3} H_{8}(g)+3 H_{2} O(g) \frac{\Delta}{\text { Catalyst }}$

(iv) $Z n(s)+N a O H(a q) \stackrel{\text { Heat }}{\longrightarrow }$

After completing the above reactions in the

balanced equations the coefficient for $H_{2}(g)$ may

be