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Writing Chemical Equations

If a chemical...

Question

If a chemical equation has '+ heat' on its right hand side, it is definitely a

(a) endothermic reaction.
(b) exothermic reaction.
(c) combination reaction.
(d) neutralization reaction.

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Solution

(b) exothermic reaction
The '+ heat' on the right side of reaction shows that heat is released in the reaction. Hence, the reaction is exothermic.

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Similar questions

Q. If a chemical equation has '+ heat' on its right hand side, it is definitely a

(a) endothermic reaction.
(b) exothermic reaction.
(c) combination reaction.
(d) neutralization reaction.

The above reaction is an example of a

(a) combination reaction.

(b) double displacement reaction.

(c) decomposition reaction.

(d) displacement reaction.

${F e}_{2} O_{3}$ + $2 A l$ $\to$ ${A l}_{2} O_{3}$ + $2 F e$

This reaction is an example of :

Q. A chemical reaction in which heat is given out is called

(a) exothermic reaction
(b) endothermic reaction
(c) decomposition reaction
(d) neutralization reaction

Q. Question 15

The following reaction is used for the preparation of oxygen gas in the laboratory.

2 {KClO}_{3} (s) Heat \to 2 KCl (s) + 3 O_{2} (g)

Which of the following statement(s) is (are) correct about the reaction?
(a) It is a decomposition reaction and endothermic in nature.
(b) It is a combination reaction.
(c) It is a decomposition reaction and accompanied by release of heat.
(d) It is a photochemical decomposition reaction and exothermic in nature.

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