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Explain the position of hydrogen in the modern periodic table. Which group of the periodic table contains solid, liquid and gaseous elements?…
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State Modern Periodic Law. Discuss the periodic trends of atomic radii for elements of Group 1 to 2 and Group 13 to…
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Write with balanced chemical equation, what happens when dry ammonia gas is passed over heated sodium.
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Identify the electrovalent and covalent compounds from among the following compounds: LiH, NH₃, KCl, C₂H₆
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Explain why the melting point of sodium chloride is much greater than that of glucose.
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Draw electron-dot structure of calcium oxide. [Atomic numbers of Ca and O are 20 and 8 respectively]
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A thin wire of resistance 4 Ω is bent to form a circle. Find the resistance across any diameter.
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Explain with a diagram why the sky appears blue.
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Explain with a suitable ray diagram the process of formation of image by a concave lens.
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Find the volume of 14 g Nitrogen gas at a temperature of 227°C and at pressure of 83.14 cm of Hg. [R…
