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

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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?

Decomposition of vegetable matter into compost 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?

Decomposition reaction 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?

Exothermic reaction Signup and view all the answers

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

Combination reaction 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?

CO₂ Signup and view all the answers

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

Respiration Signup and view all the answers

What happens to the reaction mixture in exothermic chemical reactions?

It becomes hot Signup and view all the answers

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

Decomposition reaction Signup and view all the answers

What type of energy does respiration provide?

Chemical energy 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)?

Double displacement reaction Signup and view all the answers

Why is respiration considered an exothermic reaction?

It releases heat to the surroundings Signup and view all the answers

What distinguishes endothermic reactions from exothermic reactions?

Exothermic reactions absorb energy from the surroundings Signup and view all the answers

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

In decomposition reactions, a single compound breaks down into simpler substances Signup and view all the answers

What is the result of a precipitation reaction?

Formation of a solid from aqueous solutions Signup and view all the answers

Which of the following describes an exothermic reaction?

Releases energy as heat to the surroundings Signup and view all the answers