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ICSE Class 9 Answered

<div><strong>1. &nbsp; Which type of reactions are the following:- &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;(i)PbO2+SO2-&gt;PbSO4</strong></div> <div><strong>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (ii)AgNO3+NaCl-&gt;AgCl+NaNO3</strong></div> <div><strong>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (iii)2KClO3-&gt;2KCl+3O2</strong></div> <div><strong>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (iv)2H2O2-&gt;2H2o+O2</strong></div> <div><strong>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (v)KNO3+H2SO4-&gt;HNO3+KHSO4</strong></div> <div><strong>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (vi)CuO+H2-&gt;Cu+H2O</strong></div> <div><strong>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (vii)CaCO3-&gt;CaO+CO2</strong></div> <div><strong>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (viii)NH4Cl-&gt;NH3+HCl</strong></div> <div>&nbsp;</div> <div>&nbsp;</div> <div><strong>2. &nbsp; &nbsp;State,giving reasons,whether the substances underlined have been oxidised or reduced</strong></div> <div>&nbsp;</div> <div>&nbsp;</div> <div><strong>(a)PbO+CO-&gt;Pb+CO2</strong></div> <div><strong>(b)H2S+Cl2-&gt;2HCl+S</strong></div>
Asked by Surjit | 09 Sep, 2016, 08:19: PM
Expert Answer
Dear surjitbose1960@gmail.com

Thanks for asking us a question in Ask the Expert section of TopperLearning.com.

We cannot entertain more than 2 questions with multiple subquestions in a day. In case of multiple questions within a query, please post each question individually and let us know where you are getting stuck so that we would be able to explain things better.
 
 
Answer to your first question is given below:

(i)PbO2+SO2->PbSO4
 
Combination reaction
 (ii)AgNO3+NaCl->AgCl+NaNO3
 
Double Displacement reaction
 (iii)2KClO3->2KCl+3O2
Decomposition reaction
 (iv)2H2O2->2H2o+O2
Decomposition reaction
 (v)KNO3+H2SO4->HNO3+KHSO4
Double Displacement reaction
 (vi)CuO+H2->Cu+H2O
Single displacement reaction
 (vii)CaCO3->CaO+CO2
Decomposition reaction
 (viii)NH4Cl->NH3+HCl
Decomposition reaction

Regards

Topperlearning Team.
Answered by Vaibhav Chavan | 11 Sep, 2016, 09:59: PM
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