10thsscmcq-ch3-chemicalreactionsandequations488620e598f56b6cebf190d577316381bc745c
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Allama Iqbal College of Commerce, Taunsa Sharif (D.G. Khan)**We aren't endorsed by this school
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MATH 316
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Chemistry
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Dec 17, 2024
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DATE:TIME: 1 Hrs 40 MinMARKS: 100SEAT NO:Note:-1.All Questions are compulsory.2.Numbers on the right indicate full marks.10TH SSC MCQ - CH -Chemical reactions andequations Q.1Which of the given chemical equations is balanced?A) H2O2→H2O + O2B) NaNO3 →NaNO2+ O2C) CaCO3→CaO + CO2D) Al2CO3→Al2O3 + CO2(1)Ans :C Q.2Which of the following conditions is necessary for a chemical reaction?A) It must be accompanied with change intemperature and pressureB) At least one of the reactants must be ina fixed quantityC) It must follow the law of conservation ofmassD) All of the above(1)Ans :C Q.3What is the reaction in which a substance or substances undergo change to produce newsubstances with new properties called?A) A biochemical reactionB) A nuclear reactionC) A physical reactionD) A chemical reaction(1)Ans :D Q.4In which reaction is an atom or a group of atoms present in a molecule displaced by anotheratom?A) Displacement reactionB) Double decomposition reactionC) Decomposition reactionD) Synthesis reaction(1)Ans :A Q.5In which reaction do two compounds exchange their ions to form two new compounds?A) Displacement reactionB) Double displacement reactionC) Synthesis reactionD) Decomposition reaction(1)Ans :B Q.6In which reaction does a solid get separated from the solution?A) Neutralization reactionB) Precipitation reactionC) Redox reactionD) All of the above(1)Ans :B Q.7Identify the substance which reduces a compound.A) A hydrating agentB) A dehydrating agentC) An oxidizing agentD) A reducing agent(1)Ans :D
Q.8In which reaction does the addition and the removal of oxygen takes place simultaneously?A) Oxidation reactionB) Reduction reactionC) Redox reactionD) Precipitation reaction(1)Ans :C Q.9Identify the type of reaction: H2 + Cl2→2HClA) Decomposition reactionB) Combination reactionC) Double displacement reactionD) Displacement reaction(1)Ans :B Q.10Which of the following is a redox reaction?A) CaCO3→CaO + CO2B) CuO + H2→Cu + H2OC) CaO + 2HCl →CaCl2+ H2OD) NaOH + HCl →NaCl + H2O(1)Ans :B Q.11Which of the following statements is correct about the given reaction? ZnO + CO →Zn + CO2A) ZnO is being oxidizedB) CO is being reducedC) CO is being oxidizedD) ZnO is being reduced(1)Ans :D Q.12Which of the given reactions is an odd one?A) Carbon + Oxygen →Carbon dioxideB) Hydrogen + Chlorine →Hydrogen chlorideC) Glucose →Carbon dioxide + WaterD) Sulphur + Oxygen →Sulphur dioxide(1)Ans :C Q.13How is the decomposition of silver chloride carried out?A) By electricityB) By sunlightC) By heatD) By water(1)Ans :B Q.14Which metal can prevent the corrosion of tin?A) ZincB) CopperC) LeadD) Silver(1)Ans :A Q.15Which gas is used in flush bags of chips to prevent oxidation?A) HeliumB) NeonC) NitrogenD) Argon(1)Ans :C Q.16Lime water turns milky when ________ gas is passed through it. A) H2B) COC) CO2D) SO2(1)Ans :C
Q.17The process of cellular respiration is ________ reaction. A) endothermicB) reductionC) redoxD) decomposition(1)Ans :C Q.18A white precipitate will be formed if we add common salt solution to ________ solution. A) KNO3B) AgNO3C) CuSO4D) Na2SO4(1)Ans :B Q.19The removal of oxygen from a reactant is called ________ . A) oxidationB) corrosionC) rancidityD) reduction(1)Ans :D Q.20Chemical equations are balanced in accordance with the law of ________ . A) conservation of momentumB) conservation of massC) conservation of velocityD) conservation of speed(1)Ans :B Q.21Which of the following is an exothermic reaction? A) electrolysis of waterB) cellular respirationC) process of photosynthesisD) conversion of lime stone into quicklime(1)Ans :B Q.22Which of the following is an exothermic process? A) melting of iceB) dissolution of KNO3 in waterC) dissolution of NaOH in waterD) decomposition of CaCO3(1)Ans :C Q.23Dissolution of potassium nitrate in water is a ________ . A) oxidation reactionB) reduction reactionC) exothermic processD) endothermic process(1)Ans :D Q.24The colour of the precipitate formed when potassium chromate reacts with barium sulphateis ________ . A) whiteB) yellowC) brownD) red(1)Ans :B Q.25The reaction of zinc dust with copper sulphate solution is an example of ________ . A) combination reactionB) decomposition reactionC) displacement reactionD) double displacement reaction(1)Ans :C
Q.26CaCO3→CaO + CO2is a ________ reaction. A) combinationB) displacementC) double displacementD) decomposition(1)Ans :D Q.27Which of the following is not a balanced chemical equation? A) 2Mg + O2→2MgOB) NH3+ HCl →NH4ClC) NaOH + H2SO4→Na2SO4+ H2OD) SO2+ 2H2S →3S + 2H2O(1)Ans :CQ.28Which of the following cannot be changed while balancing a chemical equation? A) molecular formulaB) number of atomsC) number of moleculesD) mass of the reactants(1)Ans :A Q.29Copper on reaction with dilute nitric acid gives ________ gas. A) nitrogenB) nitrogen dioxideC) hydrogenD) nitric oxide(1)Ans :D Q.30The catalyst used in the preparation of Vanaspati ghee from vegetable oil is ________ . A) H2B) MnO2C) NiD) O2(1)Ans :C