Advertisements
Advertisements
Question
Select the chemical changes from the following list of changes
Respiration in mammals.
Advertisements
Solution
Respiration in mammals is a CHEMICAL change, we breathe in oxygen and breathe out carbon dioxide. It is irreversible and composition changes.
APPEARS IN
RELATED QUESTIONS
Which of the following are chemical changes?
- Growth of a plant
- Rusting of iron
- Mixing of iron fillings and sand
- Cooking of food
- Digestion of food
- Freezing of water
- Burning of candle
State whether the following is physical or chemical changes.
water cycle in nature —
Tick (√) the correct alternative from the choice given for the following statement
Which one of the following is volatile in nature ?
Classify the following as physical or chemical changes :
Breaking of a glass tumbler
The rusting of an iron object is called :
Ice kept in a beaker, slowly melts and turns into water. The water in the beaker on solidification is freezing turns back to ice. Give four reasons why the change from ice to water and water back to ice is considered a physical change.
Select the chemical changes from the following list of changes
Preparation of carbon dioxide from calcium carbonate & dilute hydrochloric acid.
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
What is the difference between dissolution of sugar and burning of sugar ?
Fill in the blanks in the following statements using the words given in the box.
| rusted, colourful, substance, chemical, physical, reversible, iron oxide, object |
- Making sugar solution is a ______ change.
- A physical change is generally ______.
- Grinding of wheat grain changes its size. It is a ______ change.
- Iron benches kept in lawns and gardens get ______. It is a ______ change because a new ______ is formed.
