In a chemical reaction, we need to find a catalyst. Which of the following is often used as a catalyst? A. Platinum B. Gold C. Silver D. Copper 相关知识点: 试题来源: 解析 A。解析:Gold(黄金)、Silver(白银)、Copper(铜)虽然都是金属,但它们在一般情况下不作为常见的催化剂。Platinum(铂)...
What is the effect of using a catalyst on the reaction rate? A. Decrease it B. Increase it C. Have no effect D. Depend on the reaction 相关知识点: 试题来源: 解析 B。解析:催化剂能够降低反应的活化能,从而加快反应速率。反馈 收藏
D. A substance that has no E. ffect on a reaction. 相关知识点: 试题来源: 解析 C。解析:文中提到“A catalyst is a substance that increases the rate of a reaction without being consumed in the process”,即催化剂是一种在反应过程中不被消耗却能提高反应速率的物质。反馈 收藏 ...
When a catalyst is added to a reaction at equilibrium, what happens to the equilibrium position? A. Shifts to the right B. Shifts to the left C. No change D. Can't determine 相关知识点: 试题来源: 解析 C。解析:催化剂只能改变反应速率,不能改变平衡状态,所以平衡位置不变。
Refers to a procedure to catalyze a reaction. Using a catalyst based on a metal of Group 4 (according to the IUPAC).Claim 1: a process to produce Methanol directly Esterified Fatty acyl wherein a Fatty Acid is reacted with an alkali metal Methanol or a Methanol Ammonium in the presence ...
is consumed in the reaction C. increases the rate of a reaction without being consumed D. has no E. ffect on the reaction rate 相关知识点: 试题来源: 解析 C。原因:“A catalyst is a substance that increases the rate of a reaction without being consumed in the process.”。 反馈 收藏 ...
A. being consumed in the reaction B. providing a pathway with higher activation energy C. increasing the temperature D. providing an alternative pathway with a lower activation E. nergy 相关知识点: 试题来源: 解析 D。中文解析:催化剂通过提供具有较低活化能的替代反应途径来增加反应速率。A 选项在...
When a catalyst is added to a reaction at equilibrium, it ___ the equilibrium position. A. shifts B. changes C. does not change D. destroys 相关知识点: 试题来源: 解析 C。催化剂只能改变反应速率,不能改变平衡位置。选项 A“shifts”和选项 B“changes”都错误;选项 D“destroys”破坏也不...
If a catalyst is added to a chemical reaction, which of the following is most likely to occur? A. The activation energy will increase. B. The reaction time will be prolonged. C. The reaction rate will remain the same. D. The reaction rate will increase. ...
Adding a catalyst can ___ the rate of a chemical reaction. A. raise B. lower C. double D. affect 相关知识点: 试题来源: 解析 D。本题考查词汇及对催化剂作用的理解。raise 通常用于“提升,提高(数量、水平等)”。lower 表示“降低”,催化剂不是单纯地提高或降低反应速率。double 意思是“加倍”...