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Question

15. An equation that gives the names of the substances involved in a reaction.


A

Chemical equation

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B

Word equation

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C

Chemical formula

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D

Chemical symbol

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Solution

The correct option is B

Word equation


Explanation for correct option:

(B) Word equation:

  • A word equation gives the names of the substance involved in a reaction. For example:

Hydrogen+OxygenWater

This would represent a word equation.

  • Hydrogen and oxygen are the reactants as they are on the left-hand side of the arrow, and water is the product as it is on the right-hand side of the arrow.

Explanation for incorrect options:

(A) Chemical equation:

A symbolic representation of the changes which occur in a chemical reaction, expressed in terms of the formulae of the molecules involved, is called a chemical equation. For example,

The balanced chemical equation of water is

2H2+O22H2OHydrogenOxygenWater

(C) Chemical formula:

A set of chemical symbols showing the elements present in a compound and their relative properties is called a chemical formula. For example, the chemical formula for water is(H2O).

(D) Chemical symbol:

The letters used to represent elements are called chemical symbols. For example, the symbol of Boron is B.

So the correct answer is an option (B).


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