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Chemical Reactions and Equations | Class 10 NCERT (CBSE) Science (Chemistry) Textbook Intext Questions - Answers

 

10th CBSE - Science (Chemistry)
 Chapter 1, Chemical Reactions and Equations
NCERT Solutions of Science Textbook In-Text Questions
(Page 6)
Q.1: Why should magnesium ribbon be cleaned before burning in air ?
Q.2: Write the balanced equation for the following chemical reactions:
(i) Hydrogen + Chlorine --> Hydrogen chloride
(ii) Sodium + Water --> Sodium hydroxide + Hydrogen
Q.3: Write a balanced chemical equation with state symbols for the following chemical reactions:
(i) Solution of barium chloride and sodium sulphate in water to give insoluble barium sulphate and the solution of sodium chloride.
(ii) Sodium hydroxide solution (in water) react with hydrochloric acid solution (in water) to produce sodium chloride and water.   
(Page 10)  
Q.1: A reaction of a substance X is used for white washing.
(i) Name the substance X and write its formula.
(ii) Write the reaction of the substance X named in (i) above with water.
Q.2: Why is the amount of gas collected in one of the test tubes in Activity 1.7, double of the amount collected in the other ? Name this gas.  
(Page 13)
Q.1: Why does the colour of copper sulphate solution change when an iron nail is dipped in it ?  
Q.2: Give an example of the double displacement reaction other than the one given in Activity 1.10.
Q.3: Identify the substances that are oxidized and the substances that are reduced in the following reactions:
(i) 4Na(s) + O2(g) --> 2Na2O(s)
(ii) CuO(s) + H2(g) --> Cu(s) + H2O(liq)
Click here to see the Answers
Further Study on Chapter 1, Chemical Reactions and Equations  
  • Class 10, NCERT (CBSE) Science Notes and Sample Questions | Chapter-1, Chemical Reactions and Equations [Read]
  • Class 10, CBSE (NCERT) Science | Chapter-1, Chemical Reactions and Equations | NCERT Solution - Science Textbook Exercise [Read]



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7 comments:
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  1. AnonymousJune 12, 2010 at 10:41 AM

    where are the back exercises of chapter 1????????????????????????????????????

    ReplyDelete
  2. AnonymousJune 27, 2011 at 6:55 PM

    nicccccc

    ReplyDelete
  3. Sourav BhowmickMay 24, 2012 at 10:40 PM

    where are the answers of this ques....

    ReplyDelete
  4. AdminMay 25, 2012 at 1:12 PM

    Unknown: To view answers you have to click on 'Click here to see the Answers' given at the end of the questions.
    Please let us know if you still need our assistance ..

    ReplyDelete
  5. UnknownMay 30, 2012 at 1:39 PM

    hey y can't we save nd print these questions...there r lot of questions

    ReplyDelete
  6. UnknownSeptember 14, 2013 at 4:05 PM

    where is the chapter metals and non-metals????????????????????????????????????

    ReplyDelete
  7. 158745236January 20, 2018 at 3:09 PM

    great

    ReplyDelete