Answer these questions.
1. What are substances that take part in a chemical reaction called?
2 What are substances that are produced as a result of a reaction called?
3. In the reaction of dilute sulphuric acid with zinc metal, which gas is produced?
4. What is the colour of lead iodide?
5. What type of reaction is the dissolution of quicklime in water - exothermic or endothermic?
Answers
Answer:
1. reactants nd products
Explanation:
1)These starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.
2) A chemical reaction is the process in which atoms present in the starting substances rearrange to give new chemical combinations present in the substances formed by the reaction. These starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.
3) When zinc reacts with dilute sulphuric acid, hydrogen gas is released.
4) Lead iodide appears as a yellow crystalline solid. Insoluble in water and denser than water.
5) Quick lime reacts vigorously with water to produce slaked lime releasing a large amount of heat. Hence the reaction is highly exothermic. Dissolving quick lime or CaO is an exothermic reaction