15 Questions
What happens when grapes get fermented?
They undergo a chemical change
What happens to food when it gets digested in our body?
It undergoes a chemical change
What happens when milk is left at room temperature during summers?
It undergoes a chemical change
What happens when food is cooked?
It undergoes a chemical change
What happens when we respire?
It involves a chemical change
What happens when an iron tawa/pan/nail is left exposed to humid atmosphere?
It gets rusted due to a chemical change
What happens when grapes get fermented?
They undergo a chemical change to produce alcohol
What happens when food gets digested in our body?
It undergoes a chemical change to release nutrients
What happens when we respire?
We undergo a chemical change to release energy
What happens when milk is left at room temperature during summers?
It undergoes a chemical change to spoil
What is the nature of the initial substance when a chemical change occurs?
It has somewhat changed
How can we identify that a chemical reaction has taken place?
When a chemical change occurs
What happens when food gets digested in our body?
A chemical reaction takes place
What happens when grapes get fermented?
A chemical reaction occurs
What is the result of leaving an iron tawa/pan/nail exposed to humid atmosphere?
A chemical change occurs
Study Notes
Fermentation and Digestion
- Grapes, when fermented, undergo a chemical change that converts sugar into ethanol and carbon dioxide, resulting in the production of wine or vinegar.
- During digestion, food is broken down into simpler substances like carbohydrates, proteins, and fats, which are then absorbed and utilized by the body for energy and growth.
Effects of Temperature and Humidity
- Milk, when left at room temperature during summers, may spoil or curdle due to the growth of bacteria and other microorganisms.
- An iron tawa, pan, or nail, when exposed to humid atmosphere, undergoes rusting, which is a chemical change that converts iron into iron oxide.
Respiratory Process
- During respiration, oxygen is inhaled, and carbon dioxide is exhaled as a byproduct of cellular respiration, which releases energy from the food we consume.
Chemical Changes
- A chemical change occurs when the composition of a substance is altered, resulting in a new substance with different properties.
- A chemical reaction has taken place if there is a change in color, odor, or state of a substance, or if heat, light, or gas is produced or released.
Test your knowledge of chemical reactions and equations with this quiz! Explore the science behind everyday scenarios like food spoilage, cooking, and digestion, and see how they relate to chemical processes.
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