Topic - Matter In Our Surroundings

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Science Class 9 > Matter In Our Surroundings

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by Veer Singh | link

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Partha Pratim Bhowmick

Q. how to differentiate chalk and graphite by chemical properties ... 4 Like

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2 answers under Matter In Our... 1 year, 10 months ago

A. Graphite is not going to react with any acid, diluted or strong, infact, its known for its chemical inertness..! However, Chalk,(primarily, CaCO3), will react with any acid to produce a brisk... link
1 year, 9 months ago

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Anisha Banerjee

Q. If the difference between the melting points of two different solids is 100 K, then in the Celsius scale it will be A : − 173°C ... 3 Like

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3 answers under Matter In Our... 1 year, 7 months ago

A. A: -173 celsius link
1 year, 7 months ago

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Shrinathmishra Gutu

Q. when a solid melts , its temprature remains same , so where does the heat energy go? ... 3 Like

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1 answer under Matter In Our... 2 years, 1 month ago

A. The heat energy provided is used up for changing the state of the solid to liquid by overcoming the forces of attraction between the particles in the solid. link
2 years, 1 month ago

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Partha Pratim Bhowmick

Q. why oxygen fluoride is not an oxide ... 3 Like

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1 answer under Matter In Our... 1 year, 10 months ago

A. Fluorine is more electronegetive than oxygen, consequently, in this compound, Oxygen exhibits +2 oxidation state, and thus behaves, as a relative cation(though not in a strict sense). Since, naming... link
1 year, 9 months ago

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Anisha Banerjee