Maharashtra SSC (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 Maharashtra SSC (Class 10) Chemical Reactions and Equations in the app →In the chemical equation CuSO$_4$(aq) + Zn(s) $\longrightarrow$ ZnSO$_4$(aq) + Cu(s), which substances are theIn a chemical equation, the symbol $\Delta$ written above the reaction arrow indicates that:The equation AgNO$_3$(aq) + NaCl(aq) $\longrightarrow$ AgCl$\downarrow$ + NaNO$_3$(aq) uses a downward arrow fAn equation is called a 'balanced equation' when:Balance the equation: NaOH + H$_2$SO$_4$ $\longrightarrow$ Na$_2$SO$_4$ + H$_2$O. The correct set of coefficieThe reaction 2Mg + O$_2$ $\longrightarrow$ 2MgO, in which magnesium burns in air to form a white powder, is anWhen a few pieces of calcium oxide (CaO) are added to water, calcium hydroxide forms with a large release of hWater is decomposed into hydrogen and oxygen by passing electric current through acidulated water: 2H$_2$O(l) In the reaction in which Zn$^{2+}$ ions formed from Zn atoms take the place of Cu$^{2+}$ ions in CuSO$_4$ and Complete the displacement reaction: CuSO$_4$(aq) + Fe(s) $\longrightarrow$ ___ + ___A process or reaction in which heat is absorbed from the surroundings is called:When solid sodium hydroxide is dissolved in water the temperature of the solution rises. This dissolution is tConsider the reaction CaCO$_3$(s) + heat $\longrightarrow$ CaO(s) + CO$_2$(g). Heat must be supplied for it toBoth aluminium and zinc react with dilute hydrochloric acid to liberate H$_2$ gas, but aluminium reacts fasterEqual weights of Shahabad tile pieces and Shahabad tile powder are each treated with dilute HCl. CO$_2$ effervCaCO$_3$ powder reacts faster with concentrated HCl than with dilute HCl. This observation demonstrates that tPotassium chlorate decomposes slowly on heating, but in the presence of manganese dioxide (MnO$_2$) it decompoBalance the decomposition of potassium chlorate: KClO$_3$ $\xrightarrow{\Delta}$ KCl + O$_2$. The correct coefAccording to the chapter, which definition of oxidation is correct?In the reaction CuO + H$_2$ $\longrightarrow$ Cu + H$_2$O, which statement is correct?Acidic potassium dichromate (K$_2$Cr$_2$O$_7$/H$_2$SO$_4$) converts ethyl alcohol to acetic acid by making oxyThe damage to metals caused by oxidation due to various atmospheric components is generally called:Old or leftover cooking oil develops a foul odour and changed taste when left in air for a long time. This airIdentify the reaction that is exothermic:In the reaction 2Ag$_2$O $\longrightarrow$ 4Ag + O$_2\uparrow$, the silver in Ag$_2$O is:In the reaction 2H$_2$S + SO$_2$ $\longrightarrow$ 3S$\downarrow$ + 2H$_2$O, which reactant acts as the oxidanTo prevent rusting, iron sheets are commonly protected by applying a layer of which metal?The rate of decomposition of hydrogen peroxide (H$_2$O$_2$ $\longrightarrow$ H$_2$O + O$_2$), which is slow at