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Answer the following in detail.
Why do all objects have a tendency to fall towards the centre of the earth?
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Select the correct answer
If we suspend a magnet freely, it will settle in.
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What are magnetic and non-magnetic substances? Give two examples of each.
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Answer the following in short.
Give two examples each of magnetic and. non-magnetic substances.
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Write true or false For the following Statement
The molecules in a substance arc in random motion.
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Write true or false for the following statement
In a gas, the molecules can move anywhere in space.
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Write true or false for the following statement
The liquids are less viscous than the gases.
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Fill in the blank
The inter-molecular spacing is .......... in solids ........... in liquids and ............... in gases.
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The molecular motion in liquid and gas is in ................. path.
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In a solid, the molecules ............................................ but they remain at their fixed positions.
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The inter-molecular forces are the weakest in ...............
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A solid exerts pressure .....................
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The gases are .......... dense.
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A solid is ............ rigid.
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Select the correct alternative
The solids are
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State three characteristics of molecules of matter.
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How do the solids, liquids, and gases differ in their following properties.
(a) Size
(b) Shape
(c) Density
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Write down five general properties of solids, liquids, and gases.
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Give the molecular model for a solid and use it to explain why a solid has a definite volume and a definite shape.
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