MCQ Class 10 Science Chapter 1 Chemical Reactions and Equation Advertisement MCQ’s For All Chapters – Science Class 10th 1. Oxidation is a process which involvesremoval of hydrogenremoval of oxygenaddition of oxygenaddition of hydrogenQuestion 1 of 152. The process of reduction involvesremoval of hydrogenremoval of oxygenaddition of hydrogenBoth b & cQuestion 2 of 153. Sodium and chlorine are reacted, and as a result, sodium chloride is formed, which is also called table salt. What option gives the reactants and products of the reaction?Reactants – sodium and chlorine; products – sodium chlorideReactants – sodium and table salt; products – chlorineReactants – sodium; products – chlorineReactants – tables salt; products – sodium and chlorineQuestion 3 of 154. Which of the following reaction can also be termed a thermal decomposition reaction?Double displacement reactionCombination reactionDisplacement reactionDecomposition reactionQuestion 4 of 155. A student performs an experiment to form aluminium chloride from aluminium and chlorine. Which of the following option gives the chemical equation of the reaction?Al + Cl2 → AlCl22Al + Cl2 → 2AlCl2Al + 3Cl2 → 2AlCl33Al + 3Cl2 → 3AlCl3Question 5 of 156. Give the ratio in which hydrogen and oxygen are present in water by volume.1:81:12:11:2Question 6 of 157. A researcher adds barium hydroxide to hydrochloric acid to form a white-coloured barium chloride. Which of the following option gives the balanced chemical equation of the reaction?HCl + Ba(OH)2 → BaCl2 + 2HOH2HCl + Ba(OH)2 → BaCl2 + 2HOH2HCl + Ba(OH)2 → BaH2 + 2HCl + O2HCl + 2Ba(OH) → 2BaCl2 + 2HOH + O2Question 7 of 158. One of the following processes does not involve a chemical reaction, that is:Ripening of bananaMelting of candle wax when heatedDigestion of food in your stomachBurning of candle wax when heatedQuestion 8 of 159. The chemical formula of magnesium oxide is ______.Mg(OH)2MgO2Mg2OMgOQuestion 9 of 1510. A student adds lead and silver to two different test tubes containing an equal amount of copper sulphate solution. The student observes that the colour of the solution in the test tube with lead changes. What explains the change in the colour of the solution?A displacement reaction takes place as lead replaces copper from the solution.A combination reaction takes place as lead combines with sulphate in the solution.A decomposition reaction takes place as copper dissociates from sulphate in the solution.A double displacement reaction takes place as copper dissociates from sulphate and lead combines with sulphate in the solution.Question 10 of 1511. Which of the following reactions is used in black-and-white photography?Oxidation reactionCombination ReactionDisplacement reactionDecomposition ReactionQuestion 11 of 1512. What happens when lead nitrate reacts with potassium iodide?Evolution of gas will occurThey will not reactYellow ppt of lead iodide and potassium nitrate will be producedA large amount of hydrogen will be releasedQuestion 12 of 1513. Which of the following shows an oxidation reaction?Gain of hydrogenGain of oxygenLoss of oxygenNone of the aboveQuestion 13 of 1514. Which of the following is an endothermic process?Respiration in human beingsDilution of sulphuric acidSublimation of dry iceCondensation of water vapoursQuestion 14 of 1515. In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?Potassium sulphateLead sulphate (insoluble)Lead acetateAmmonium nitrateQuestion 15 of 15 Loading...
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