Practise Questions on Chemical Reaction and Equation MCQ Q1:When Ag is exposed to air, it gets a black coating of (a) AgNO3 (b) Ag2O (c) Ag2S (d) Ag2CO3 Q2:In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide...
Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of th
If possible, make the equation more informative by indicating the physical states of the reactants and products, the heat changes that occur in the reaction, and the conditions under which the reaction occurs. This step may be skipped if you do not have enough information about the physical s...
In this process breaking and forming bonds between atoms takes place. Compounds that interact to produce new compounds are called reactants whereas the newly formed compounds are called products. Q2 What is chemical reaction and equation? A chemical reaction is in which the bonds are broken ...
What is the chemical equation for the reaction? A. H₂ + CuO = Cu + H₂O₂ B. H₂ + CuO = Cu + O₂ C. H₂ + CuO = Cu + H₂O D. H₂ + Cu₂O = Cu + H₂O 相关知识点: 试题来源: 解析 C。中文解析:氢气还原氧化铜的化学方程式为 H₂ + CuO = Cu +...
Reactants are the substance(s) that go into a chemical reaction and are typically found to the left of the arrow in a chemical reaction formula. Heat energy may be lost during this process in an exothermic reaction, or it may be absorbed in an endothermic reaction. Each of the types of...
In most cases, entering a chemical equation will require us to use several of the CEM tools in the same answer blank. In the example problem below, we are asked to enter the complete, balanced chemical reaction between P4(s) and O2(g) to produce P4O10(s). The correct answer is: P4...
A. products to reactants. B. reactants to products. C. catalysts to reactants. D. products to catalysts. 相关知识点: 试题来源: 解析 B。解析:在化学反应方程式中,箭头是从反应物指向产物。选项 A 方向错误。选项 C 和 D 催化剂不是反应的主要物质,箭头不指向它们。反馈 收藏 ...
DSST Astronomy Study Guide and Test Prep Life Science: Middle School Browse by Lessons Chemical Energy Lesson for Kids: Definition & Examples Bond Energy: Definition, Equation & Calculations Non-reversible Chemical Changes: Lesson for Kids Reaction Coordinate Diagram | Overview & Examples Thermodynamics...
The following mechanism is proposed for the reaction between hydrogen and iodine monochloride: Step 1: H2+ ICl →HI + HCl Step 2: HI + ICl →I2+ HCla. Write the balanced equation for the overall reaction. All components are gaseous. ...