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Deepak Rock
@deepak-rock
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Joined: Aug 6, 2021
Last seen: Sep 10, 2021
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Topics: 1742 / Replies: 303
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Topic
Write the balanced equations with state symbols for the following reactions: (a) Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 224
Topic
Write the balanced equations for the following chemical reactions: (a) Hydrogen + Chlorine ➝ Hydrogen chloride
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 145
Topic
Why should magnesium ribbon be cleaned before burning in air?
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 107
Topic
A metal salt MX when exposed to light splits up to form metal M and a gas X2. Metal M is used in making ornaments whereas gas X2 is used in making bleaching powder.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 300
Topic
When a strip of red-brown metal X is placed in a colourless salt solution YNO3 then metal Y is set free and a blue coloured salt solution X(NO3)2 is formed.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 327
Topic
A red-brown metal X forms a salt XSO4. When hydrogen sulphide gas is passed through an aqueous solution of XSO4, then a black precipitate of XS is formed along with sulphuric acid solution.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 306
Topic
Two metals X and Y form the salts XSO4 and Y2SO4, respectively. The solution of salt XSO4 is blue in colour whereas that of Y2SO4 is colourless.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 275
Topic
A metal X forms a water soluble salt XNO3. When an aqueous solution of XNO3 is added to common salt solution, then a white precipitate of compound Y is formed along with sodium nitrate solution.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 337
Topic
When a black metal compound XO is heated with a colourless gas Y2, then metal X and another compound Y2O are formed. Metal X is red-brown in colour which does not react with dilute acids at all.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 326
Topic
A strip of metal X is dipped in a blue coloured salt solution YSO4. After some time, a layer of metal Y from the salt solution is formed on the surface of metal strip X.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 269
Topic
When hydrogen burns in oxygen, water is formed and when water is electrolysed, then hydrogen and oxygen are produced. What type of reaction takes place: (a) in the first case? (b) in the second case?
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 191
Topic
A colourless lead salt, when heated, produces a yellow residue and brown fumes.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 265
Topic
When a green iron salt is heated strongly, its colour finally changes to brown and odour of burning sulphur is given out. (a) Name the iron salt. (b) Name the type of reaction that takes place during the heating of iron salt.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 318
Topic
What happens when an aqueous solution of sodium sulphate reacts with an aqueous solution of barium chloride? (b) Write the balanced chemical equation for the reaction which takes place.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 335
Topic
Explain the term “rancidity”. What damage is caused by rancidity? (b) What type of chemical reaction is responsible for causing rancidity?
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 356
Topic
Explain the term “corrosion” with an example. Write a chemical equation to show the process of corrosion of iron. (b) What special name is given to the corrosion of iron?
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 146
Topic
What happens when a zinc strip is dipped into a copper sulphate solution?
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 86
Topic
What happens when silver chloride is exposed to sunlight? Write a chemical equation for this reaction. Also give one use of such a reaction.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 219
Topic
What happens when silver nitrate solution is added to sodium chloride solution? (a) Write the equation for the reaction which takes place. (b) Name the type of reaction involved.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 333
Topic
In the reaction represented by the following equation : CuO(s) + H2(g) → Cu (s) + H2O(1) (a) name the substance oxidised (b) name the substance reduced
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 135
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