Which of the following are not decomposition reactions-CaCO-3-s-heat-CaO-s- - CO-2-g-2KClO-3-s-heat-2KCl-s- - 3O-2-g-Zn-s- - 2HCl-aq-ZnCl-2-aq- - H-2-g-H-2-g- - Cl-2-g-2HCl-aq-

The correct options are C Zn(s) + 2HCl(aq)→ZnCl_2(aq) + H_2(g) D H_2(g) + Cl_2(g)→2HCl(aq)In a decomposition reaction, the reactant breaks into two or more simp ...

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Byju's Answer

Standard VII

Chemistry

Change in State

Which of the ...

Question

Which of the following are not decomposition reactions?

{CaCO}_{3} (s)^{heat - - \to} CaO(s) + {CO}_{2} (g)

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{2KClO}_{3} (s)^{heat - - \to} 2KCl(s) + {3O}_{2} (g)

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Zn(s) + 2HCl(aq) \to {ZnCl}_{2} (aq) + H_{2} (g)

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H_{2} (g) + {Cl}_{2} (g) \to 2HCl(aq)

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Solution

The correct options are
C $Zn(s) + 2HCl(aq) \to {ZnCl}_{2} (aq) + H_{2} (g)$
D $H_{2} (g) + {Cl}_{2} (g) \to 2HCl(aq)$
In a decomposition reaction, the reactant breaks into two or more simple products. So, the reactions of calcium carbonate and potassium chlorate to form products are examples of decomposition reaction.

The reaction between zinc and hydrochloric acid is a displacement reaction as zinc is displacing hydrogen.

The reaction between hydrogen and chlorine is a combination reaction as the reactants are combining to form hydrogen chloride.

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Similar questions

Q. Match the followings

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Q. State the information conveyed by the following equation.

Z n (s) + 2 H C l (a q) \to Z n C l_{2} (a q) + H_{2} ↑

Q. Which of the following is correct about the oxidation in the given equation?

Z n (s) + 2 H C l (a q) \to Z n C l_{2} (a q) + H_{2} (g)

Q. Which of the following reaction is /are correct ?

M g (s) + C l_{2} (g) \to M g C l_{2} (s)

.....(1)

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.....(2)

Q. Complete the following reactions:
(a)

Z n C O_{3} (s) + 2 H C l (a q) \to

Z n C l_{2} (a q)

+ ____ + ____

(b)

N a H C O_{3} (s) + H N O_{3} (a q) \to

____ +

H_{2} O (l)

+ ____

(c)

C u O (s) + H_{2} S O_{4} (a q) \to

____ + ____

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