Question

fill in the blanks

1-A chemical reaction take place when two or more reactants come in contact with ______ and transfer of ______ takes place.

2- By adding dilute HCL to solid sodium carbonate taken in a test tube, a chemical reaction takes place with the evolution of _____ gas.

3-The transition of a solid chemical compound directly into gases on heating without entering into the liquid state is called _____.

4- When a potassium iodide solution is added to lead acetate solution, a yellow coloured precipitate of ____ is obtained.

5- In a chemical change, an ______ sign is made between the reactants and the products size. ​

Answer 1

Answer:

blaaaahb nans eswqwjeebeukwjnw

Answer 2

Answer:

1)one another, energy

2) carbon dioxide

5) arrow

Explanation:

sorry for that I don't know 3rd and 4th answer