CBSE Class 10 Chemical Reactions and Equations — practice questions
28 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 10 Chemical Reactions and Equations in the app →In a chemical equation, the substances written on the left-hand side are the:The substances formed in a chemical reaction are called the:A balanced chemical equation has an equal number of atoms of each element on both sides because of the law of:The reaction A + B → AB, where two substances combine to form one, is a:A reaction of the type AB → A + B, where a single compound breaks into simpler substances, is a:A reaction in which a more reactive element displaces a less reactive one from its compound is a:Gain of oxygen (or loss of electrons) by a substance is called:Loss of oxygen (or gain of electrons) by a substance is called:A reaction in which oxidation and reduction occur simultaneously is called a:The slow conversion of iron into rust in the presence of moisture and air is an example of:The oxidation of fats and oils in food, producing a bad smell and taste, is called:Decomposition brought about by passing electricity through a substance is called:The decomposition of a substance on heating is called ___ decomposition:A reaction in which two or more reactants combine to form a single product is called:When a single reactant breaks down into two or more products, the reaction is called:Rusting of iron is an example of:An exothermic reaction is one in which heat is:Zn + CuSO₄ → ZnSO₄ + Cu is an example of:The chemical formula of slaked lime is:In a chemical equation, the symbol (s), (l), (g), (aq) represent:The reaction AgNO₃ + NaCl → AgCl + NaNO₃ is best classified as:The substance which gets oxidised in the reaction CuO + H₂ → Cu + H₂O is:Photosynthesis can be classified as a (an):The chemical equation 2 H₂ + O₂ → 2 H₂O is balanced because:Galvanisation, the coating of iron with a thin layer of another metal to prevent rusting, uses:Rancidity of food is caused by:Quicklime (CaO) reacts vigorously with water to form slaked lime. This reaction is:The colour of copper sulphate solution is: