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At which place on a magnet, its magnetic force is maximum?
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Short Answer Type Question:
Metals have lustre (shine). Give the reason why some metal articles become dull and loose their shine.
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Short Answer Type Question:
Kerosene, coconut oil, mustard oil do not dissolve in water, even on shaking. They separate after sometime forming two different layers. Explain why.
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Short Answer Type Question:
Name a non-metal that has lustre.
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Short Answer Type Question:
Metals generally occur in solid state and are hard. Name a metal that exists in liquid state and a metal that is soft and can be cut with knife.
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Short Answer Type Question:
Name the naturally occurring hardest substance known.
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Short Answer Type Question:
Why is water called a universal solvent?
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Long Answer Type Question:
Describe an experiment to prove that water is transparent.
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Long Answer Type Question:
Write an experiment to show that our palm is translucent.
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What is the name of thin wire in the electric bulb?
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Draw a diagram showing the two terminals of a bulb.
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Name the scientist who invented the electric bulb.
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The headlights of a car have reflectors behind the bulb. What is the function of reflectors?
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Long Answer Type Question:
How can you show that some solids like sugar, salt are soluble in water whereas solids like chalk powder and sand are not soluble in water?
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How does a light ray travel?
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Give one natural source of light.
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State difference between a luminous and a non-luminous body.
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Why is the moon not considered as a luminous body?
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What is an incandescent body? Give example.
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How will you convert a glass sheet into a translucent sheet?
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