MCQ Class 10 Science Chapter 1 Chemical Reactions and Equation Advertisement MCQ’s For All Chapters – Science Class 10th 1. Which of the following is a thermal decomposition reaction?ZnCO3 → ZnO + CO22H2O → 2H2 + O2H2(g) + Cl2(g) → 2HCl(g)2AgCl → 2Ag + Cl2Question 1 of 172. Which of the following reactions will not take place?Zn + CuSO4 → ZnSO3 + CuMg + FeSO4 - MgSO4 + FeZn + MgSO4 → ZnSO4 + Mg2KBr + Cl2 →KCI+ Br2Question 2 of 173. Some crystals of copper sulphate were dissolved in water. The colour of the solution obtained would be:browngreenredblueQuestion 3 of 174. What is observed when a solution of potassium iodide is added to silver nitrate solution?Agl is soluble in water.yellow precipitate of Agl is formedNo reaction takes placeWhite precipitate of silver iodide is formedQuestion 4 of 175. When green coloured ferrous sulphate crystals are heated, the colour of the crystal changes because:it loses water of crystallisationit forms SO3it forms SO2it is decomposed to ferric oxideQuestion 5 of 176. In an electrolytic cell where electrolysis is carried, anode has:Connected to negative terminal of the batteryPositive changeNegative chargeNone of these is correctQuestion 6 of 177. Pb + CuCl2 → PbCl2 + Cu This reaction is an example of:combinationdecompositiondouble displacementdisplacementQuestion 7 of 178. A substance which oxidizes itself and reduces other is known asreducing agentoxidizing agentBoth (a) and (b)None of theseQuestion 8 of 179. Which of the following gases can be used for storageCarbon dioxide or HeliumHelium or NitrogenNitrogen or OxygenCarbon dioxide or OxygenQuestion 9 of 1710. Select the Oxidising agent for the following reaction: H2S + I2 > 2HI + SHII2SH2SQuestion 10 of 1711. A substance added to food containing fats and oils is called:CoolantAntioxidantOxidantRancidQuestion 11 of 1712. Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is:4:11:11:22:1Question 12 of 1713. Dissolving sugar is an example of-Redox ReactionPhysical changeChemical changeNone of these.Question 13 of 1714. The reaction between lead nitrate and potassium iodide present in aqueous solutions is an example ofNeutralization reactionDecomposition ReactionDisplacement ReactionDouble Displacement ReactionQuestion 14 of 1715. The condition produced by aerial oxidation of fats and oils in foods marked by unpleasant smell and taste is called:CorrosionAntioxidationReductionRancidityQuestion 15 of 1716. What happens when dilute hydrochloric acid is added to iron filling?Iron salt and water are producedHydrogen gas and iron chloride are produced.Chlorine gas and iron hydroxide are producedNo reaction takes placeQuestion 16 of 1717. Which one of the following processes involve chemical reactions?Keeping petrol in a china dish in the openHeating copper wire in presence of air at high temperatureStoring of oxygen gas under pressure in a gas cylinderLiquefaction of airQuestion 17 of 17 Loading...
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