Practice questions without fighting the page.

"Serene" is an adjective that describes a state of calm, peace, or tranquility.

<b>Answer: Steel</b> <ul> <li>Reason: Sound speed depends on the medium’s elasticity and density. In solids, bonds transmit vibrations faster. For steel, the elastic modulus is high and density is favorable, giving a high speed.</li> <li>Key concept: v ≈ √(E/ρ) for solids (longitudinal waves). Higher E and lower ρ (relative to E) yield higher v.</li> <li>Why others are incorrect: Vacuum has no medium for sound to travel; water and air are much less stiff, so their speeds are lower than steel.</li> <li>Exam tip: Remember: solids > liquids > gases; among solids, metals like steel are among the fastest.</li> </ul>

Golden coloured Muga silk is one of the rarest silks in the world. Due to its golden nature, it has now come to be known as the Golden Silk of Assam as it is found only in the state.

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Arboriculture is the art of cultivating, properly managing, and studying individual shrubs, trees, vines, and any other woody plants.