Which of the following reactions will go to completion?
I. $Z n + H C l$
II. $H C I + N a O H$
III. $A g^{+} (a q) + C l^{-} (a q)$

II only

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III only

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I and II only

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II and III only

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I, II, and III

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Solution

The correct option is B I, II, and III
A reaction will go to completion (to the right) if one of several things happens on the product side.
If a product is a gas such as hydrogen gas in the following reaction $Z n + H C l \to Z n C l_{2} + H_{2} (g)$
If a product is a solid precipitate such AgCl in the following reaction $A g^{+} + C l^{-} \to A g C l (s)$
If a product is a molecule that forms from two ions getting together on the product side such as salt NaCl from the following reaction $H C l + N a O H \to N a C l + H_{2} O$
Any activity which removes separated ions on the left reactant side and combines them into a precipitate or molecule on the product side will cause a reaction to run to completion. All three reactions will go to completion.

Suggest Corrections

Similar questions

Identify the types of reactions:-

(i) $H_{2} (g) + C l_{2} (g) \to 2 H C l (g)$

(ii) $N a O H (a q) + H C l (a q) \to N a C l (a q) + H_{2} O (l)$

(iii) $F e (s) + S (s) h e a t - - \to F e S (s)$

[C r (N O_{2})_{3} (N H_{3})_{3}]

K_{3} [F e (C_{2} O_{4})_{3}]

[C o C l_{2} (e n)_{2}]^{+}

[C o B r C l (o x)_{2}]^{3 -}

(I) A g^{+} (a q) + C l^{-} (a q) \to A g C l (s) (I I) N H_{4} C l (s) \to N H_{3} (g) + H C l (g) (I I I) 2 N H_{3} (g) \to N_{2} (g) + 3 H_{2} (g)

I . A g^{+} (a q) + C l^{-} (a q) \to A g C l (s)

I I . N H_{4} C l (s) \to N H_{3} (g) + H C l (g)

I I I . 2 N H_{3} (g) \to N_{2} (g) + 3 H_{2} (g)

Z n

H C l

H_{2} (g)

C l_{2} (g)

Z n^{2 +} (a q)

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