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Elements, Compo...

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  • Question 1
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    How much is Sulphur dioxide soluble in water?

  • Question 2
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    Whichofthefollowingis an example of exothermic change? 

  • Question 3
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    With the help of which process kerosene oil can be separated from water?

  • Question 4
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    Which of the following acid is helpful in making in soft drinks?

  • Question 5
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    Whichofthefollowingis used in sterilization of drinking water? 

  • Question 6
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    Which of the following is helpful in refining oil?

  • Question 7
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    Who proposed one of the properties of atom i.e., “atoms contain negatively charged particles called electrons”?

  • Question 8
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    Which of the followingsubstance does the dissolving (the tea)? 

  • Question 9
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    During the process of chlorination, which of the following chemicals are used?

  • Question 10
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    Whichofthefollowingis the symbol of helium? 

  • Question 11
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    Which of the following is seen in tobacco? 

  • Question 12
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    Gun powder is a mixture of.____________

  • Question 13
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    In which state participation reaction takes place?

  • Question 14
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    Which of the following is produced while heating copper carbonate? 

  • Question 15
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    Which of the molecule is made up of more than three atoms?

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