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Physical and Ch...

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  • Question 1
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    Which of the following is not a characteristic of catalyst?

  • Question 2
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    What type of change occurs on conversion of iron metal into nails and screws?

  • Question 3
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    Which of the following is applicable to chemical change?

  • Question 4
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    Consider the following physical change:

    18 g of ice is converted into steam by heating and then this 18 g of steam is cooled to water, and then further cooled to form ice again.

    Which of the following statements is true about the above change?

  • Question 5
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    When ice is heated, which of the following changes does not occur?

  • Question 6
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    Which observation denotes chemical change for the process of sublimation of ammonium chloride, NH4Cl  NH3 + HCl?
    (i)    Solid ammonium chloride vaporises
    (ii)    Partial dissociation of ammonium chloride
    (iii)   Ammonium and hydrogen chloride recombine to ammonium chloride
    (iv)   Ammonium chloride vapours solidify

  • Question 7
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    What happens when electric current is passed through acidulated water in voltmeter?

  • Question 8
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    Which of the following are chemical changes?
    (i)     Electrolysis of water      
    (ii)    Breaking of glass
    (iii)   Crystallisation of sugar  
    (iv)   Heating of sugar

  • Question 9
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    Which of the following statements cannot be applied to evaporation?

  • Question 10
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    What can be inferred from the following statement?
    'When sugar is dissolved in water, the solution becomes sweet. But the same sugar is obtained on removal of water by evaporation.`

  • Question 11
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    What type of change occurs on conversion of milk into curd, and when milk is kept in a warm place?

  • Question 12
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    Which of the following is not a property of iron rust?

  • Question 13
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    What happens when sugar crystals are heated in a dry test tube?

  • Question 14
    1 / -0

    Which of the following statements is true?

  • Question 15
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    What type of change(s) occur(s) on heating zinc hydroxide?

  • Question 16
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    Which of the following is not a physical change?

  • Question 17
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    What is true about rusting of iron?

  • Question 18
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    Which of the following is not true about burning of wood?

  • Question 19
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    Which of the following can be categorized under a physical change?

    (i)   Crystallisation of salt
    (ii)   Burning of wood
    (iii)  Magnetising iron
    (iv)  Ripening of fruits

  • Question 20
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    Which of the following processes involves both chemical and physical changes?

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