Class 10 Science Chemical Reactions Quiz

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Questions and Answers

What is the balanced chemical equation for the reaction between hydrogen and oxygen to form water?

  • 4H₂ + 2O₂ → 4H₂O
  • 2H₂ + O₂ → 2H₂O (correct)
  • H₂ + 1/2O₂ → H₂O
  • H₂O₂ → H₂O + 1/2O₂

What is the product of the chemical reaction between sodium and chlorine gas?

  • Na₂Cl₂
  • NaCl (correct)
  • Na₂Cl
  • NaCl₂

In a chemical equation, what does the arrow (→) represent?

  • Transforms
  • Yields (correct)
  • Produces
  • Consumes

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Study Notes

Chemical Reactions

  • The balanced chemical equation for the reaction between hydrogen and oxygen to form water is 2H₂ + O₂ → 2H₂O.
  • The product of the chemical reaction between sodium and chlorine gas is sodium chloride, also known as common table salt.
  • In a chemical equation, the arrow (→) represents the direction of the reaction, indicating the reactants on the left and the products on the right.

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