Please select a subject first
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Electroplating is based on ______ effect of electricity.
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A layer of zinc-coated over iron. Why?
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The time taken for one complete vibration is called its ______.
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What are the symptoms of hearing loss?
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______ became the first Indian woman astronaut to go to space.
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Write about Sunitha William’s work at NASA.
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The other name for potassium hydroxide is caustic potash.
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Reason out
Sand is also known as silica.
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Write about the occurrence of carbon dioxide.
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Atoms that carry positive or negative charges are called ______.
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Mention some simple ideas to avoid water pollution.
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What is osmoregulation?
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The process of separating the grains from their chaffs is called ______.
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Match the following:
| 1. | Paddy | a. | Fodder |
| 2. | Muskmelon | b. | Oil crop |
| 3. | Millet | c. | Zaid crop |
| 4. | Sesame | d. | Food crop |
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Complete the analogy.
Knot in a thread : ______ friction :: Ball bearing : ______ friction.
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______ was the first manned mission of NASA to go to the moon.
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Write a note on Apollo missions.
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What happens when carbon dioxide is passed through lime water? Write the equation for this reaction.
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