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CBSE Class 10 Answered

Why should we clean magnesium ribbon before burning?
Asked by Yusuf | 21 Mar, 2012, 11:53: AM
answered-by-expert Expert Answer
Magnesium ribbon is rubbed with sand paper to remove the layer of magnesium oxide formed on it by its exposure in air
Answered by | 22 Mar, 2012, 09:50: AM

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CBSE 10 - Chemistry
A chemical reaction in which exchange of ions occurs between the reactants, is known as: (A) Endothermic Reaction (B) Exothermic Reaction (C) Double Displacement Reaction (D) Displacement Reaction
Asked by sagarmishra | 04 Mar, 2024, 09:50: AM
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CBSE 10 - Chemistry
what is pop formula
Asked by 09.10bjanvhijadhav | 02 Mar, 2024, 08:22: AM
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CBSE 10 - Chemistry
BaCl2 +NaSO4 gives NaCl+BaSO4 is a neutalisation reaction?
Asked by prassanna.j | 01 Mar, 2024, 11:59: AM
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CBSE 10 - Chemistry
how to solve valency
Asked by yadavparmit83 | 01 Dec, 2023, 06:16: AM
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CBSE 10 - Chemistry
1) A single displacement reaction is represented below. PQ + R ----> PR + Q Which of the following is true about the reactants and products? Refer image for the TABLE (a) A (b) B  (c) C (d) D
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Asked by susrisangita792 | 17 Nov, 2023, 08:27: PM
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CBSE 10 - Chemistry
what is chemical formula
Asked by ramjilal01071988 | 14 Oct, 2023, 08:42: PM
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CBSE 10 - Chemistry
write the chemical equation for reaction that takes place when lead nitrate and potassium iodine solutions are mixed
Asked by dikshantnaik1008 | 21 Jul, 2023, 11:47: AM
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CBSE 10 - Chemistry
On heating blue coloured powder of Copper (I) Nitrate in a boiling tube, Copper Oxide (black), Oxygen gas and a brown gas X is formed (a) Write a balanced chemical equation of the reaction. (b) Identify the brown gas X evolved. (c) Identify the type of reaction. (d) What could be the pH range of the aqueous solution of the gas X ?
Asked by susrisangita792 | 07 Jun, 2023, 11:54: AM
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CBSE 10 - Chemistry
how we get the result of NH3+ HCL =NH4CL
Asked by shoaibhakak41 | 18 Jan, 2023, 02:17: PM
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CBSE 10 - Chemistry
an iron metal compound 'Y', after decomposition changes into a solid brown substance and evolve a gas having characteristic odour of burning sulphur. Write the chemical reaction associated with this observation.
Asked by nehashekh291 | 03 Jan, 2023, 03:11: PM
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