Balanced Chemical Equations

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STD 10 - Chemical Reactions and Equations

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pifly ..

India

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Balanced Chemical Equations


Froggy Jumps Balanced Chemical EquationsVersion en ligne STD 10 - Chemical Reactions and Equations par pifly .. 1 Why is it important to balance a chemical equation? a To change the properties of products b To ensure the equation looks symmetric c To follow the Law of Conservation of Mass 2 Which of the following is a balanced equation? a Zn + H₂SO₄ → ZnSO₄ + H₂ b Fe + H₂O → Fe₃O₄ + H₂ c H₂ + Cl → HCl 3 What does a skeletal chemical equation lack? a Correct chemical formulas b Coefficients to show balanced atoms c Product formation 4 What is the physical state symbol for a substance dissolved in water? a (g) b (l) c (aq) 5 In the reaction: Fe + 4H₂O → Fe₃O₄ + 4H₂, what is the state of H₂O? a Liquid b Steam (Gas) c Solid 6 Which element should you usually balance first in a chemical equation? a One that appears least often b One with the maximum number of atoms c Hydrogen 7 What is the correct coefficient for Fe in the balanced reaction: Fe + H₂O → Fe₃O₄ + H₂? a 2 b 1 c 3 8 What is the purpose of adding physical states like (s), (l), (g), (aq) in equations? a To show temperature b To indicate the phase of substances c To mark important reactants 9 What is the method called that balances equations using smallest whole number coefficients? a Algebraic method b Observation method c Hit-and-trial method 10 In a balanced equation, the number of atoms of each element on both sides must be: a Unequal b Equal c Double on product side

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Balanced Chemical Equations

Froggy Jumps

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Créé par

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Balanced Chemical EquationsVersion en ligne

par pifly ..

Why is it important to balance a chemical equation?

Which of the following is a balanced equation?

What does a skeletal chemical equation lack?

What is the physical state symbol for a substance dissolved in water?

In the reaction: Fe + 4H₂O → Fe₃O₄ + 4H₂, what is the state of H₂O?

Which element should you usually balance first in a chemical equation?

What is the correct coefficient for Fe in the balanced reaction: Fe + H₂O → Fe₃O₄ + H₂?

What is the purpose of adding physical states like (s), (l), (g), (aq) in equations?

What is the method called that balances equations using smallest whole number coefficients?

In a balanced equation, the number of atoms of each element on both sides must be: