Karnataka SSLC (Class 10) Chemical Reactions and Equations — practice questions
15 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Karnataka SSLC (Class 10) Chemical Reactions and Equations in the app →A chemical equation is balanced to obey the law ofA reaction in which two or more reactants combine to form a single product is aA reaction that releases heat energy to the surroundings is described asThe breaking down of a single compound into two or more substances is aIn the balanced equation $3Fe + 4H_2O \rightarrow Fe_3O_4 + xH_2$, the value of $x$ isThe decomposition of silver chloride into silver and chlorine in sunlight is aWhen an iron nail is dipped in copper sulphate solution, the reaction that occurs is aThe reaction $Na_2SO_4 + BaCl_2 \rightarrow BaSO_4\downarrow + 2NaCl$, forming an insoluble solid, is aIn a chemical reaction, the gain of oxygen by a substance is calledIn the reaction $CuO + H_2 \rightarrow Cu + H_2O$, the substance that is reduced isThe development of a black coating on silver articles left in air is an example ofThe unpleasant smell and taste developed in oily foods left exposed for long is calledThe decomposition of water into hydrogen and oxygen on passing electric current is calledRespiration, in which glucose combines with oxygen to release energy, is best described as a(n)A reducing agent in a redox reaction is the substance that