Holiday homework
Class 10 Chemistry
Assignment 1 (April)
1. Translate the following statements into a balanced chemical equation :
a, Barium chloride reacts with aluminium sulphate to give aluminium chloride and barium sulphate.
b, Lead nitrate reacts with sulphuric acid to form a precipitate of lead sulphate and nitric acid.
2. When potassium iodide solution is added to a solution of lead nitrate in a test tube, a precipitate is formed.
a, What is the colour of this precipitate? Name the compound precipitated.
b, Write the balanced chemical equation for this reaction.
c, List two types of reactions in which this reaction can be placed.
3. A compound 'A' is used in the manufacture of cement. When dissolved in water.,it evolves a large amount of heat and forms compound 'B'.
a, Identify A and B.
b, Write chemical equation for the reaction of A with water.
c, List two types of
reaction in which this reaction may be classified
4. with the help of an activity explain that hydrogen and oxygen are released when an electric current is passed through water
5. A magnesium ribbon is burnt in oxygen to give a white compound X accompanied by emission of light. If the burning Ribbon is now placed in an atmosphere of nitrogen, it continue to burn and form a compound Y.
a, Write the chemical formula of X and Y
b, Write the balanced chemical equation when X is dissolved in water.
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Answer:
1.bacl2+als3---> Alcl3+basu2
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