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State True and False and choose the correct option
(i) Liquids on heating changes into vapour.
(ii) Air does not occupy any space.
(iii) In solids, molecules are packed and closed together.
(iv) Water is a mixture of different elements.
- a)TFTF
- b)TTFF
- c)FTFT
- d)FFTT
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
State True and False and choose the correct option(i) Liquids on heat...
True and False statements:
(i) Liquids on heating changes into vapour. - True
(ii) Air does not occupy any space. - False
(iii) In solids, molecules are packed and closed together. - True
(iv) Water is a mixture of different elements. - False
Explanation:
(i) Liquids on heating changes into vapour.
This statement is true. When a liquid is heated, it gains energy and the kinetic energy of its molecules increases. As a result, the molecules start moving faster and overcome the intermolecular forces holding them together. This leads to the liquid changing into its gaseous state, which is called vaporization or evaporation.
(ii) Air does not occupy any space.
This statement is false. Air, like any other gas, occupies space. It is made up of molecules and particles that have mass and volume. These molecules move freely and fill the space available to them. For example, if you blow up a balloon, the air molecules inside the balloon occupy the space inside it.
(iii) In solids, molecules are packed and closed together.
This statement is true. In solids, the molecules are tightly packed and closely arranged. The intermolecular forces between the molecules are strong, which keeps them in a fixed position. This is why solids have a definite shape and volume.
(iv) Water is a mixture of different elements.
This statement is false. Water is not a mixture of different elements. It is a compound made up of two elements, hydrogen and oxygen. The chemical formula of water is H2O, which means it consists of two hydrogen atoms bonded to one oxygen atom.
Correct option: The correct option is (a) TFTF.
(i) Liquids on heating changes into vapour. - True
(ii) Air does not occupy any space. - False
(iii) In solids, molecules are packed and closed together. - True
(iv) Water is a mixture of different elements. - False
Explanation:
(i) Liquids on heating changes into vapour.
This statement is true. When a liquid is heated, it gains energy and the kinetic energy of its molecules increases. As a result, the molecules start moving faster and overcome the intermolecular forces holding them together. This leads to the liquid changing into its gaseous state, which is called vaporization or evaporation.
(ii) Air does not occupy any space.
This statement is false. Air, like any other gas, occupies space. It is made up of molecules and particles that have mass and volume. These molecules move freely and fill the space available to them. For example, if you blow up a balloon, the air molecules inside the balloon occupy the space inside it.
(iii) In solids, molecules are packed and closed together.
This statement is true. In solids, the molecules are tightly packed and closely arranged. The intermolecular forces between the molecules are strong, which keeps them in a fixed position. This is why solids have a definite shape and volume.
(iv) Water is a mixture of different elements.
This statement is false. Water is not a mixture of different elements. It is a compound made up of two elements, hydrogen and oxygen. The chemical formula of water is H2O, which means it consists of two hydrogen atoms bonded to one oxygen atom.
Correct option: The correct option is (a) TFTF.
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Community Answer
State True and False and choose the correct option(i) Liquids on heat...
Air is a matter, so it occupies space. Water is a compound which has two elements Hydrogen and Oxygen in a definite ratio.
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