Advertisements
Advertisements
Question
Complete the table given below.
| Heat on iodine crystals | Colour of vapours evolved |
Advertisements
Solution
| Heat on iodine crystals | Colour of vapours evolved | Violet (I2 Iodine vapours) |
APPEARS IN
RELATED QUESTIONS
TRUE \ FALSE
Evaporation of water is a physical change. True or false ?
When hydrogen burns in oxygen, water is formed; when electricity is passed through water, hydrogen and oxygen are given out. Name the type of chemical change involved in the two cases.
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
Represent the addition of dilute sulphuric acid to zinc by means of a chemical equation. State the function of the arrow between the reactants and products.
Give examples of exothermic reactions i.e. heat evolved in each of the following:
(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.
Anaerobic bacteria digest animal waste and produce biogas (Change – A). The biogas is then burnt as fuel (Change – B). The following statements pertain to these changes. Choose the correct one.
Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think formation of rust from iron is a chemical change?
Which is used as a catalyst during the process of hydrogenation of oils?
How would you show that the settling of curd is a chemical change?
