Question Pool Compounds of Non Metals

Compounds of Non Metals - SAMAGRA Question Pool & Answers | Class 10 English Medium

Kerala Syllabus SAMAGRA SCERT SAMAGRA Question Pool for Class 10 English Medium Chemistry Compounds of Non Metals

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Qn 1.

The equation showing the reaction between potassium nitrate ( KNO3 ) and sulphuric acid (H2SO4) is given

a) Complete the equation

b) Which of the given salts react with H2SO4 to form HCl

( NaNO3 , Mg(OH), CaSO4 , NaCl )

c) Write down the equation to represent the above reaction

 



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Qn 2.

The equation of the reaction of Conc.H2SOwith carbon is given

         0     +1+6-2                      +4 -2   +1 -2  +4 -2

a) The oxydation state of which one gets increased

b) Which is the reducing agent?

c) Which substance gets reduced?



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Qn 3.

When a few drops of an acid was added to blue copper sulphate crystals it was decolourised.

a) Which acid shows the above property?

b) Name the process of manufacture of the acid

c) Write any one use of the acid



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Qn 4.

a) Choose the chemicals used to prepare ammonia from the box given below

KNO3 , BaCl2 , NH4Cl , NaCl , Ca(OH)2, H2SO4

 

b) Complete the equation

c) Liquor ammonia : concentrated aquous solution of ammonia

Liquid ammonia : . .............................................



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Qn 5.

A pungent smell was felt when calcium hydroxide and ammonium chloride were mixed in a glass jar. The equation of the same is given below

a) Which is the gas formed here?

b) Write any one physical property of the gas formed

c) Write any one use of the gas formed



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Qn 6.

Analyse the figure and answer the questions

a) Why did water get into the flask on pressing the piston of syringe

b) What property of ammonia is exhibited by the change of colour of water entering the flask in to pink?

c) Complete the equation



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Qn 7.

The figure of preparation of Ammonia in the laboratory is given

a) Complete the equation

b) Why is the gas formed passed through the drying tower?

c)Can sulphuric acid be used as the drying agent in ammonia preparation. Why?

d) Ammonia is collected in an inverted gas jar. Why?



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Qn 8.

The equation of manufacture of ammonia is given

a) Name the process

b) Give any one use of ammonia

c) How can you identify Ammonia



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Qn 9.

The flow chart of manufacture of sulphuric acid is given.

a) What are A and B

b) Sulphuric acid will be formed on dissolution of SOin water. But this is not used in the manufacturing process.Why?

c) Write any one use of sulphuric acid



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Qn 10.

Different stages of manufacture of sulphuric acid are given below.

a) What are X and Y

b) How is Y converted to H2SO4

c) Name the process of manufacture of Sulphuric acid



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Qn 11.

Which property of sulphuric acid is exhibited in the following reactions?

 

I)

 

II)



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Qn 12.

a) A black substance is obtained when a few drops of Conc.H2SOis added to a little sugar taken in a watch glass. Identify the substance

b) Which property of sulphuric acid is exhibited here?

c) Complete the eqution



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Qn 13.

Equation of the reaction between Cu and H2SOis given

a) The oxidation number of which one gets increased?

b) Which substance gets reduced?

c) Which is the reducing agent?



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Qn 14.

Write down an experiment to identify sulphate salts?

  • Answer)
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    Qn 15.

    Complete the equation

    b) Which is the oxidising agent in this reaction?



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    Qn 16.

    Equation of the reaction between Cu and H2SOis given

     

    a) The oxidation number of which one gets increased?

    b) Which substance gets reduced?

    c) Which is the reducing agent?



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    Qn 17.

    a) In the above reaction sodium chloride reacts with sulphuric acid to form hydrochloric acid. Like wise, if you want to prepare nitric acid which is the salt to be used

    b) Write the equation of the reaction



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    Qn 18.

    a) Gases like Cl2 , SO, HCl are passed through Conc. H2SOduring their laboratory preparation. Which property of sulphuric acid is utilised here?

    b) NH3 gas is not passed through H2SOduring its lab preparation. Why?



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    Qn 19.

    A few drops of Conc. H2SOare added to a little sugar crystals taken in a watch glass

    a) What will be the observation?

    b) Analyse the equation and explain the reason

    c) Which property of Sulphuric acid is exhibited here?



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    Qn 20.

    Why SOis dissolved in concentrated sulphuric acid instead of in water during the manufacture of sulphuric acid?



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    Qn 21.

    a) In the above reaction sodium chloride reacts with sulphuric acid to form hydrochloric acid. Like wise, if you want to prepare nitric acid which is the salt to be used

    b) Write the equation of the reaction



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    Qn 22.

    Complete the following equations related with the manufacture of sulphuric acid

    i) Write a,b,c,d

    ii) How is sulphuric acid prepared from oleum



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    Qn 23.

    a) Name the process of manufacture of sulphuric acid ?

    b) Which is the catalyst used in this process ?



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    Qn 24.

    Carboxylic acid + Alcohol‍ + Heat ? Ester‍ + Water

    a. In order to get ester we have to heat the mixture. Do you agree with this statement. Explain your answer based on Le- Chatelier’s Principle

    b. What will happen to the forward reaction if the water formed in the system is removed from this system



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    Qn 25.

    H2 + I2 ? 2HI + Heat

    Consider the equilibrium and answer the questions

    a. Which reaction is favoured on increasing the concentration of I2

    b. What is the effect of pressure on this equilibrium

    c. HI is to be kept at low temperature to prevent decomposition. What is your opinion about this statement



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    Qn 26.

       N2O4(g)   ?    2NO2(g)

     

    Consider this equilibrium and complete the table given below

    Activity

    Change in rate of forward reaction

    • Heats

    • Increase the pressure

    • Removes NO2

    •  

    •  

    •  


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    Qn 27.

    Equation showing the decomposition of calcium cabonate is given.

    CaCO3(s) + Heat ? CaO(g) + CO2(g)

    Say whether high temperature or low temperature is preferrable to enhance the rate of forward reaction



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    Qn 28.

    Equation of ammonia manufacture is given

     

    N2+3H2 ? 2NH+ Heat

    a. Name the process of manufacture of ammonia.

    b. What is the effect of pressure in the equilibrium?

    c. Though the forward reaction is exothermic a comparatively high temperature of 4500c is used here, why?



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    Qn 29.

    N2 + O2 + Heat  ? 2NO

    How does each of the factors given below affect the rate of forward reaction?

    a. Decrease in temperature

    b. Increase in pressure

    c. Removal of NO



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    Qn 30.

    The graph representing a reversible reaction is given.

    a. Which of the graph represents backward reaction?

    b. At which point does the system attain equilibrium?

    c. When a system attains equilibrium, the concentration of reactants and products will not change. Why?



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    Qn 31.

    CO(g) + H2(g) ? CO2(g) + H2(g)

    How do the factors given below affect the above system at equilibrium.

    a Carbon dioxide is removed

    b. More carbonmonoxide  is added

    c More hydrogen is added



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    Qn 32.

    N2(g) + 3H2(g) ? 2NH3 (g)

    Consider the system at equilibrium

    a. Write any two methods to increase the amount of product.

    b. Which is the catalyst that can be used here?

    c. What is the effect of a catalyst on an equilibrium?



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    Qn 33.

    2SO2(g) + O2(g) ? 2SO3(g) + Heat

    a. How will the increase in the amount of oxygen affect the forward reaction?

    b. Will an increase in pressure help formation of more amount of products.



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    Qn 34.

    Consider the following chemical equilibrium

    14. 2CO(g) + O2(g) ? 2CO2(g)

    a. What are the reactants 

    b. What will happen to the equilibrium if more oxygen is added to the system. Explain

    c. What will be the effect of increase in pressure on the forward reaction



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    Qn 35.

    N2(g) + 3H2(g) ? 2NH3(g) + ????

    What will be the effect of the following factors on the system at equilibrium

    a. Ammonia is removed from the system

    b. Decreased the temperature

    c. Decreased the pressure

    d. Hydrogen is added



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    Qn 36.

     A,B and C are three gases .1 mole of A reacts reversibly with 1 mole of B to form 2 mole of C.

    a. Write the equation of the above reaction?

    b. What will be the effect of pressure on this system when it attains equilibrium

    c. What will happen to the equilibrium when more of A is added to the system

    d. What will happen to the system at equilibrium when the amount of C is increased



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    Qn 37.

    2HI(g) + Heat ? H2(g) + I2(g)

    Which among the following factor does not affect the system at equlibrium. Why?

    (i) Increased the concentration of reactants

    (ii) Added more hydrogen

    (iii) Increased the temperature

    (iv) Increased the pressure



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    Qn 38.

    A system at equilibrium is given

    N2 (g) + 3H2 (g) ? 2NH3 (g) + Heat

    (a) When does a reversible reaction attain equilibrium.

    (b) What change occur in concentration of reactants and products when the system is equilibrium

    (Concetration of reactant is equal to the concentration of product, Concentration of reactants and concentration of products remain as such, Concentration of product increases)



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    Qn 39.

    Which among the following does not affect the rate of chemical reaction

    (Temperature, Pressure, Colour of reactants, Concentration)



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    Qn 40.

    Optimum temperature used in the manufacture of ammonia is -----------



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    Qn 41.

    H2(g) + I2(g) ? 2HI(g)

    Which of the following does not have any effect on the equilibrium?

    (Temperature ,Pressure ,Concentration)



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    Qn 42.

    A System at equilibrium is given

    N2O4 (g) ? 2NO2 (g)

    Write any two conditions which favour the formation of the NOgas



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    Qn 43.

    Which of the following equilibria is not affected by change in pressure? Why?

    i. H2 (g) + I2 (g) ? 2HI(g)

    ii. N2O4 (g) ? 2NO2 (g)



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    Qn 44.

    Two bits of cotton wool dipped separately in Con HCl and ammonia solution are placed at the ends of a glass tube as shown in the figure.

    a) What is the white fume formed by the reaction ?

    b.Why is the thick white fume formed near the cotton wool dipped in Con.HCl.



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    Qn 45.

    A glass rod dipped in con HCl is shown in a gas jar filled with ammonia

    a) Write the observation

    b) NH3 + HCl → ......................



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    Qn 46.

    What is the difference between liquor ammonia and liquid ammonia.



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    Qn 47.

    Observe the figure showing the the laboratory preparation of ammonia and answer the question