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What are the characteristics of chemical change ?

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Important Questions on Atoms Combining

EASY
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
Cooking of all food items is an example of a chemical change.
HARD
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
Two substances X and Y react to form a new substance X2Y according to the following equation:
2X + Y → X2Y
Which of the following are incorrect?
i. The product formed is an element.
ii. The product cannot be classified as a compound.
iii. The product will always have a fixed composition.
iv. X2Y exhibits the properties of both A and B.
HARD
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change — A) then it burns (Change — B). The following statements pertain to these changes. Choose the correct one.
(i) Process — A is a chemical change.
(ii) Process — B is a chemical change.
(iii) Both processes A and B are chemical changes.
(iv) None of these processes is a chemical change.
EASY
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change

Ranbir was on his way to Manu's birthday. He was meeting Manu after many years. On his way, the petrol in his vehicle was used up. He filled petrol and reached Manu's house. Ranbir could see that Manu had grown taller. He was standing in front of a cake lit with a set of candles. He wished Manu, ate a piece of cake and then returned home.

Burning of petrol in Ranbir's vehicle is a physical change.

MEDIUM
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change

Pick out the odd-one from the following:

sugar, coal, milk, honey, bronze.

MEDIUM
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change

Explain the terms:

a.compound

b.colloid.

EASY
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
The preparation of food materials by plants through photosynthesis is an example of a chemical change.
EASY
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
The composition of a _____ is fixed.
EASY
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
A pure substance which contains two different kinds of atoms is called _____.
MEDIUM
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
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.
(i) Process — A is a chemical change.
(ii) Process — B is a chemical change.
(iii) Both processes A and B are chemical changes.
(iv) None of these processes is a chemical change.
EASY
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
Define chemical changes.
EASY
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change

Give two characteristics of a chemical compound.

MEDIUM
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
How would you show that setting of curd is a chemical change?
EASY
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
Digestion of food is an example of
EASY
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
What does chemical change mean?
MEDIUM
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
Give two characteristics of a chemical compound. 
MEDIUM
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
Why is germination of a seed a chemical change?
EASY
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
Benzene is a compound and it contains carbon and hydrogen.
MEDIUM
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it?
MEDIUM
Chemistry>Inorganic Chemistry>Atoms Combining>Compounds, Mixtures, and Chemical Change

Give four characteristics of a compound.