Chemical equations

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Chemical equations: Overview

This topic explains chemical equations and the method to write them. It helps us understand the differences between balanced and unbalanced equations. Ionic equations along with the way to balance them are also explained here.

Important Questions on Chemical equations

HARD
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Describe the significance of a balanced chemical equation over the skeletal equation.

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The law of conservation of mass states that the mass of matter can neither be created nor be destroyed.

MEDIUM
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A balanced chemical equation has the same number of atom or atoms of an element on the reactant side as well as on the _____ side.

EASY
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Select whether the following statement is true or false, regarding steps for writing a chemical equation:

In a chemical equation, the total number of atoms of each element on the left side and right side of the arrow must be the same.

EASY
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Select which of the following statements is correct regarding steps for writing a chemical equation:

EASY
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Select whether the following statement is true or false regarding the steps for writing a chemical equation:

In a chemical equation, a compound is written by giving its chemical formula, which lists the symbols of the constituent elements and uses the subscript to indicate the number of atoms of each element present in the compound.

EASY
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Select the correct steps that are used in the case of writing a chemical equation.

EASY
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In a balanced chemical equation, the number of atom or atoms of an element on the reactant side as well as the product side are not equal.

EASY
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Complete the following chemical equations: ZnO+2NaOH_____.

EASY
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Complete the following chemical equations: Zn+H2SO4_____.

EASY
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Complete the following chemical equations: 2PbNO32Heat_____.

EASY
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Complete the following chemical equations: CaCO3heat_____.

EASY
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Complete the following chemical equations: 2Ca+O2_____.

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What information do we get from a chemical equation?

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A chemical equation carries only limited information about a chemical change.

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A chemical equation can be balanced on the basis of the law of _____.

EASY
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Classify the following as combination, decomposition, displacement, precipitation or neutralisation reactions.

NaOH+HClNaCl+H2O.

MEDIUM
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What are the ways by which a chemical equation can be made more informative? 

MEDIUM
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Explain the need of balancing a chemical equation? What information is conveyed by a balanced chemical equation?