Chemistry
Grade-6
Easy
Question
Which of the following statements is not correct?
- Air is the mixture of many gases
- The air percentage of sulfur dioxide in the air is less than 1 %.
- The percentage of oxygen in air inhaled and exhaled by humans remains the same.
- Air shows definite chemical properties on its own.
Hint:
Air contains various gases and each gas has its own chemical property.
The correct answer is: Air shows definite chemical properties on its own.
The statement "Air shows definite chemical property on its own" is false
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Which of the following statements are true or false?
(i) The percentage of water vapor in the air always remains fixed.
(ii) We cannot observe the dust particles directly in the air.
(iii) The amount of dust particles varies from place to place and time to time.
Which of the following statements are true or false?
(i) The percentage of water vapor in the air always remains fixed.
(ii) We cannot observe the dust particles directly in the air.
(iii) The amount of dust particles varies from place to place and time to time.
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Read the following paragraph and answer the question from the following.
Until the 18th century, people use to believe that air was just a substance. Now by many experiments, it has been proved that it is not a substance, but it is a mixture of gases.
Which of the following statements is/are correct?
(i) Water is present in the vapor form in the air.
(ii) Water is not present in the air.
(iii) Air is a mixture of liquid and gases.
(iv) Some impurities like smoke and germs are also present in the air.
Read the following paragraph and answer the question from the following.
Until the 18th century, people use to believe that air was just a substance. Now by many experiments, it has been proved that it is not a substance, but it is a mixture of gases.
Which of the following statements is/are correct?
(i) Water is present in the vapor form in the air.
(ii) Water is not present in the air.
(iii) Air is a mixture of liquid and gases.
(iv) Some impurities like smoke and germs are also present in the air.
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The water droplets present on the outer sidewall of the picture below comes from
The water droplets present on the outer sidewall of the picture below comes from
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According to Lavoisier, the inactive gas present in the air is
According to Lavoisier, the inactive gas present in the air is
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For which of the following processes is air essential?
For which of the following processes is air essential?
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The chemical formula of carbon dioxide is
The chemical formula of carbon dioxide is
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Match the statements of Column A with those of Column B.
Match the statements of Column A with those of Column B.
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The nitrogen gas in earlier days was named
The nitrogen gas in earlier days was named
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The ratio of nitrogen to oxygen by volume present in the air is
The ratio of nitrogen to oxygen by volume present in the air is
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Identify the products (X and Y) obtained in the reactions below.
Mercury (II) oxide 
X + Y
Identify the products (X and Y) obtained in the reactions below.
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Which of the following is/are not the properties of air?
(i) The air is transparent in nature.
(ii) The air is a good conductor of heat and electricity.
(iii) Air is highly compressible in nature.
(iv) The liquid air has a fixed boiling point.
Which of the following is/are not the properties of air?
(i) The air is transparent in nature.
(ii) The air is a good conductor of heat and electricity.
(iii) Air is highly compressible in nature.
(iv) The liquid air has a fixed boiling point.
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Which of the following components is not present in the air?
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Which of the following characteristics does not belong to air?
Which of the following characteristics does not belong to air?
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Various components of air can be separated by
Various components of air can be separated by
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Which of the properties of air can be proved from the following picture?
Which of the properties of air can be proved from the following picture?
ChemistryGrade-6
