Chemistry
Grade-7
Easy
Question
Air is a mixture of gases including
- Nitrogen
- Oxygen
- Carbon dioxide
- All of these
Hint:
All of these
The correct answer is: All of these
- Air is a mixture of several gases and dust particles. The percentage distribution of different gases is as follows: Nitrogen 78%, Oxygen 21%, Argon 0.9%, and the remaining portion is held by various other gases such as carbon dioxide, neon, helium, sulphur dioxide, and others.
- Water vapour is also present in air. The quantity of air space that can hold water varies with temperature and pressure.
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Chemistry
Which of the following is a mixture?
(i).Tap water
(ii). Alum powder
(iii). Bread
(iv). Soda water
(v). Carbon dioxide
Which of the following is a mixture?
(i).Tap water
(ii). Alum powder
(iii). Bread
(iv). Soda water
(v). Carbon dioxide
ChemistryGrade-7
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State whether the following statements are true or false.
(i) A heterogeneous mixture can be separated by using the physical methods.
(ii) A homogeneous mixture can be separated by using the physical methods.
(iii) Alloys are the examples of homogeneous solutions.
State whether the following statements are true or false.
(i) A heterogeneous mixture can be separated by using the physical methods.
(ii) A homogeneous mixture can be separated by using the physical methods.
(iii) Alloys are the examples of homogeneous solutions.
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A cup of instant coffee is an example of
A cup of instant coffee is an example of
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Based on the solubilities of the components in the mixtures, they are divided into
Based on the solubilities of the components in the mixtures, they are divided into
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The components of the mixture can be
The components of the mixture can be
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A mixture can be formed by mixing two or more materials
A mixture can be formed by mixing two or more materials
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Soda water is an example of what kind of mixture?
Soda water is an example of what kind of mixture?
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Identify the type of mixture present in the following picture.
Identify the type of mixture present in the following picture.
ChemistryGrade-7
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Classify the following substances into the solid-solid, solid-liquid, and liquid-liquid mixtures.
(i). Soil
(ii). Seawater
(iii). Steel
(iv). Chocolates
(v). Water and kerosene
(vi). Almond oil in water
Classify the following substances into the solid-solid, solid-liquid, and liquid-liquid mixtures.
(i). Soil
(ii). Seawater
(iii). Steel
(iv). Chocolates
(v). Water and kerosene
(vi). Almond oil in water
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Heterogeneous mixtures can typically be
Heterogeneous mixtures can typically be
ChemistryGrade-7
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Identify the type of each mixture as homogeneous mixture or heterogeneous mixture
(i) Ice-cream
(ii) Petrol and water
(iii) Smoke
(iv) Lemonade
Identify the type of each mixture as homogeneous mixture or heterogeneous mixture
(i) Ice-cream
(ii) Petrol and water
(iii) Smoke
(iv) Lemonade
ChemistryGrade-7
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The composition of constituents in the homogeneous mixture can be
The composition of constituents in the homogeneous mixture can be
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During the formation of a mixture
During the formation of a mixture
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Mixtures are
Mixtures are
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Which of the following is not a characteristic of the mixture?
Which of the following is not a characteristic of the mixture?
ChemistryGrade-7
