Page 2 - H.A. 2 (PRACTICE WS)
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Q.5 Assertion: Silver chloride is stored in dark coloured bottles.
Reason: Silver chloride decomposes in presence of heat.
Q.6 Balance the following equations
a) Fe + O2 Fe2O3
b) FeO3 + CO Fe + 3CO2
c) PbO2 + HCl PbCl2 + H2O + Cl2
Q.7 Ferrous sulphate decomposes with the evolution of a gas having a characteristic
odour of burning sulphur. Write the chemical reaction involved and identify the type
of reaction.
Q.8 The milkyness of lime water disappears on passage of excess CO2. Justify with
a balanced chemical equation.
Q.9 Rakesh took a small amount of quick lime in a beaker and added water to it
slowly. What are his observations? Will there be any change in temperature? If yes
justify.
Q.10 Reshma brought some silver bromide from the school laboratory in a test tube.
After reaching home she found the colour of silver bromide turned into grey. Explain
the reason with the balanced chemical equation.
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