Home › Karnataka SSLC (Class 10) › Science › Chemical Reactions and Equations › In a chemical reaction, the gain of oxygen by a …
In a chemical reaction, the gain of oxygen by a substance is called
Aoxidation
Breduction
Cneutralisation
Dprecipitation
Answer & Solution
Correct answer: A. oxidation
1. Gain of oxygen (or loss of hydrogen) is **oxidation**.
2. Loss of oxygen (or gain of hydrogen) is reduction.
3. e.g. 2Cu + O₂ → 2CuO, copper is oxidised.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch1 'Chemical Reactions and Equations', §1.3_
Related questions
A reducing agent in a redox reaction is the substance thatRespiration, in which glucose combines with oxygen to release energy, is best described asThe decomposition of water into hydrogen and oxygen on passing electric current is calledThe unpleasant smell and taste developed in oily foods left exposed for long is calledThe development of a black coating on silver articles left in air is an example ofIn the reaction $CuO + H_2 \rightarrow Cu + H_2O$, the substance that is reduced isThe reaction $Na_2SO_4 + BaCl_2 \rightarrow BaSO_4\downarrow + 2NaCl$, forming an insolublWhen an iron nail is dipped in copper sulphate solution, the reaction that occurs is a