Question
Write with balanced chemical equation, what happens when dry ammonia gas is passed over heated sodium.
Write with balanced chemical equation, what happens when dry ammonia gas is passed over heated sodium.
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Subject: Physical Science
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Question
Identify the electrovalent and covalent compounds from among the following compounds
Identify the electrovalent and covalent compounds from among the following compounds: LiH, NH₃, KCl, C₂H₆
Question
Explain why the melting point of sodium chloride is much greater than that of glucose.
Explain why the melting point of sodium chloride is much greater than that of glucose.
Question
Draw electron-dot structure of calcium oxide. [Atomic numbers of Ca and O are 20 and 8 respectively]
Draw electron-dot structure of calcium oxide. [Atomic numbers of Ca and O are 20 and 8 respectively]
Question
A thin wire of resistance 4 Ω is bent to form a circle. Find the resistance across any diameter.
A thin wire of resistance 4 Ω is bent to form a circle. Find the resistance across any diameter.
Question
Explain with a diagram why the sky appears blue.
Explain with a diagram why the sky appears blue.
Question
Explain with a suitable ray diagram the process of formation of image by a concave lens.
Explain with a suitable ray diagram the process of formation of image by a concave lens.
Question
Find the volume of 14 g Nitrogen gas at a temperature of 227°C and at pressure of 83.14 cm of Hg. [R = 8.314 J mol⁻¹ K⁻¹]
Find the volume of 14 g Nitrogen gas at a temperature of 227°C and at pressure of 83.14 cm of Hg. [R…
Question
The volume of a certain amount of gas at a temperature of 27°C and at pressure 76 cm of Hg is 200 c.c. Find the volume of the gas when pressure of the gas changes to 38 cm of Hg and temperature changes to 127°C.
The volume of a certain amount of gas at a temperature of 27°C and at pressure 76 cm of Hg is 200…
Question
How are global warming and greenhouse effect related?
How are global warming and greenhouse effect related?