I. Very Short Type Questions: 1 Mark for each

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1. Which of the following metals can replace copper from a solution of copper sulphate?

  [HSLC 2015 ]

               (a) Silver                          (b) Gold   

               (c) Zinc                            (d) Mercury

 

2. Fe2O3+ 2Al → Al2O +2Fe [ HSLC, 2016 , 18]

The above reaction is an example of-

          a) a combination reaction

          b) a decomposition reaction

          c) a displacement reaction

          d) a double displacement reaction

 

3. 10 ml of a solution of NaOH is found to be completely neutralized by 8 ml of a given solution of HCl . If you take 20 ml of the same solution of NaOH , the amount of HCl solution (the same solution as before ) required to neutralized it will be : [HSLC 2020]

                  a ) 4 ml                   b) 8 ml 

                   c) 16 ml                  d) 12 ml

 

4. What happens when dilute hydrochloride acid is added to Iron filings [ HSLC 2017 ]

           a) Hydrogen gas and Iron Chloride are produced

           b) Chlorine gas and iron hydroxide are produced

           c) No reaction takes place

           d) iron salt and water are produced

 

5. reaction of zinc with dilute sulphuric acid is -

         a) a displacement as well as redox reaction

         b) a decomposition reaction as well as combination reaction

         c) a precipitation reactions as well as double redox reaction

        d) a reaction as well as double displacement reaction redox

 

 6. what happen mercuric oxide (HgO) is heated ? Give chemical equation [HSLC 2017]

 

7. translate the following statement in chemical equation and than balance them [HSLC 2018]

       a) hydrogen gas combines with nitrogen to form ammonia.

       b) hydrogen sulphide gas burns in air to give water and sulphur dioxide.

 

8. why do we apply paint on iron articles? [HSLC 2018]

 

9. Oil and fat containing food items are flushed with nitrogen why? [HSLC 2018]

 

10. Give an example of a double displacement reaction. [HSLC 2019]

 

II. Short Type Questions: Marks: 2/3

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1. Why are decomposition reaction called the opposite of combination reaction? Write equation or this reation. [ HSLC 2015]

 

2. Take 2 gm of Silver Chloride in china dish and place it in sunlight [ HSLC 2015]

      a) What is the colour of silver chloride after sometime ?

     b) What type of reaction takes place ?

     c) Write the Chemical reaction for the above observation.

3. Translate the following statement into chemical equation and balance them: [HSLC 2015]

     a) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a            precipitate of barium sulphate.

     b) Zinc reacts with copper sulphate to give Zinc sulphate and metallic copper.

     c) Hydrogen sulphide burns in air to give water and sulphur dioxide .

 

4. Take 1 g copper powder in a china dish and heat then- [HSLC 2016]

     a) what will be the colour of the copper powder ?

     b) Write the balanced chemical reaction for the above observation.

 

5. Translate the following statements into chemical equations and balanced them: [HSLC 2016]

    a) Hydrogen gas combines with nitrogen to form ammonia.

    b) Zinc carbonate is heated strongly to give Zinc Oxide and Carbon dioxide.

 

6. Define exothermic and endothermic reaction. Give one example of each with chemical reaction. [ HSLC 2016, 18]

 

7. What will happen if a solution sodium hydrocarbonate is heated ? Give equation of the reaction involved. [HSLC 2016]

 

8. Write the balanced chemical equation for the preparation of bleaching powder. Mention two uses of bleaching powder. [HSLC 2016]

 

9. Write balanced equations with state symbols for the following reaction: [HSLC 2017]

 

Solution of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and solution of sodium Chloride.

 

10. Sodium hydroxide solution (in water ) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.

[ HSLC 20017]