Science 6 Rationalised 2023-24 Quiz: Chemical Reaction in Whitewashing
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Questions and Answers

Which process involves the combination of glucose and oxygen to provide energy in the cells of our body?

  • Photosynthesis
  • Fermentation
  • Decomposition
  • Respiration (correct)

What is the special name given to the reaction where glucose combines with oxygen to produce energy?

  • Respiration (correct)
  • Fermentation
  • Chemiosmosis
  • Photosynthesis

Identify the type of reaction where a single reactant breaks down to give simpler products.

  • Synthesis reaction
  • Combustion reaction
  • Decomposition reaction (correct)
  • Replacement reaction

Which of the following is an example of an exothermic reaction in the text?

<p>Decomposition of vegetable matter into compost (A)</p> Signup and view all the answers

In the chemical equation $2FeSO_4(s) ightarrow Fe_2O_3(s) + SO_2(g) + SO_3(g)$, what type of reaction is taking place?

<p>Decomposition reaction (A)</p> Signup and view all the answers

What is the correct way to describe a reaction where heat is given out along with the formation of a single product?

<p>Exothermic reaction (D)</p> Signup and view all the answers

Which type of chemical reaction occurs when two or more substances combine to form a single product?

<p>Combination reaction (A)</p> Signup and view all the answers

In the reaction $Ca(OH)_2(aq) + CO_2(g) → CaCO_3(s) + H_2O(l)$, which substance is formed after the reaction takes place?

<p>COâ‚‚ (D)</p> Signup and view all the answers

Which of the following is NOT an example of an exothermic reaction?

<p>Respiration (C)</p> Signup and view all the answers

What happens to the reaction mixture in exothermic chemical reactions?

<p>It becomes hot (A)</p> Signup and view all the answers

Which type of reaction involves the breakdown of a compound into simpler substances?

<p>Decomposition reaction (D)</p> Signup and view all the answers

What type of energy does respiration provide?

<p>Chemical energy (C)</p> Signup and view all the answers

Which type of reaction is represented by the equation: Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) + Barium bromide(s)?

<p>Double displacement reaction (A)</p> Signup and view all the answers

Why is respiration considered an exothermic reaction?

<p>It releases heat to the surroundings (C)</p> Signup and view all the answers

What distinguishes endothermic reactions from exothermic reactions?

<p>Exothermic reactions absorb energy from the surroundings (B)</p> Signup and view all the answers

Why are decomposition reactions termed as the opposite of combination reactions?

<p>In decomposition reactions, a single compound breaks down into simpler substances (B)</p> Signup and view all the answers

What is the result of a precipitation reaction?

<p>Formation of a solid from aqueous solutions (C)</p> Signup and view all the answers

Which of the following describes an exothermic reaction?

<p>Releases energy as heat to the surroundings (B)</p> Signup and view all the answers

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