Please select a subject first
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Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
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The region in a sound wave, with higher pressure and density, is called ______ and that with low pressure and density is called ______.
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Medium is ______ for generation of sound.
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The total number of compressions and rarefactions produced per second in a sound wave is 1000. The frequency of the sound wave is __________.
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Different sound notes have different ______.
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How are different sound notes generated in musical instruments like guitar, which uses strings for sound generation, and flute, which uses blown air for sound generation?
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How is sound produced in a human larynx and a loudspeaker?
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Match the following:
| Human larynx | Vibrations of metal arms |
| Loudspeaker | Vibrations in air column |
| Jal-Tarang | Vibrations in vocal cords |
| Tuning fork | Vibrations in strings |
| Sitar | Vibrations of screen |
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Plastic shows ______ property, hence it can be moulded to any shape.
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Motor cars are coated with ____________.
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Who is my partner?
| 'A' column | 'B' column |
| a. Lead glass | i. Plates |
| b. Bakelite | ii. Mattresses |
| c. Thermocol | iii. Electric bulb |
| d. Optic glass | iv. Electric switch |
| e. Polypropylene | v. Lens |
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Write the natural or manmade raw material of the following items.
Mattress, glass vessel, bangle, chair, gunny bag, broom, knife, pen.
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How the plastic is produced?
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Distinguish between.
Man made material and natural material.
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Distinguish between
Thermoplastic and thermosetting plastic.
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Explain the effect of following materials on environment and human health.
1. Plastic
2. Glass
3.Thermocol.
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Which measures will you arrange to minimize the environmental problems arising due to non-degradable plastic?
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Write short note.
Glass production.
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Write short note.
Uses of plastic.
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