Chemical Reactions and Equation-Chemical Equations (CBSE Class-10 Science): Questions 16 - 24 of 33

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Question number: 16

» Chemical Reactions and Equation » Chemical Equations » Writing a Chemical Equation

» Chemical Reactions and Equation » Chemical Equations » Balanced Chemical Equations

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What are combination reactions?

Question number: 17

» Chemical Reactions and Equation » Chemical Equations » Writing a Chemical Equation

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What are the changes that can be observed to determine a chemical reaction?

Question number: 18

» Chemical Reactions and Equation » Chemical Equations » Writing a Chemical Equation

» Chemical Reactions and Equation » Chemical Equations » Writing Symbols of Physical States

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How would we indicate the physical state of reactants or products in a given chemical equation?

Question number: 19

» Chemical Reactions and Equation » Chemical Equations » Writing a Chemical Equation

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What is a chemical equation?

Question number: 20

» Chemical Reactions and Equation » Chemical Equations » Writing a Chemical Equation

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A compound A is used for drinking, has pH = 7. Its acidified solution undergoes decomposition in presence of electricity to produce gases B and C. The volume of B is double than C. B is highly combustible whereas C is supporter of combustion. Identify A, B & C and write the chemical reactions involved.

Question number: 21

» Chemical Reactions and Equation » Chemical Equations » Writing a Chemical Equation

» Chemical Reactions and Equation » Chemical Equations » Writing Symbols of Physical States

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What information regarding physical state we get from the following representations – (g), (l), (aq) and (s)?

Question number: 22

» Chemical Reactions and Equation » Chemical Equations » Writing a Chemical Equation

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Write down the steps to balance a chemical equation.

Explanation

Reacting substances are reactants on the left hand side of the equation.

Substances formed are products on the right hand side of the arrow.

In chemical equation + implies reacts with and - > implies produces.

Numbers in front of the formulas are coefficients and indicates relative number of molecules… (94 more words) …

Question number: 23

» Chemical Reactions and Equation » Chemical Equations » Writing a Chemical Equation

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What do you mean by a chemical equation?

Question number: 24

» Chemical Reactions and Equation » Chemical Equations » Writing a Chemical Equation

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With the following materials (a) marble chips (b) dilute hydrochloric acid (c) Zinc granules, name the type of reaction which will occur, when marble chips and Zinc granules are added one by one to acid taken in two separate test tubes?

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