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Chemical Reacti...

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  • Question 1
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    Which of the following information is not conveyed by the chemical formula of a compound?

  • Question 2
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    HNO3 is the molecular formula of nitric acid. How many total number of atoms are present in one molecule of nitric acid?

  • Question 3
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    What does the subscript 3 indicate in the formula of aluminium sulphate?

  • Question 4
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    Which of the following subscript is omitted while writing the chemical formula of compound?

  • Question 5
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    Which of the following metals does not undergo corrosion?

  • Question 6
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    Which of the following names correctly represents the IUPAC name of the compound BF3?

  • Question 7
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    In a chemical reaction, _______ are (is) produced as a result of a chemical change.

  • Question 8
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    A compound is formed of 2 atoms of X and 3 atoms of Y. X is a non metal, Y is a metal. What is the valency of Y?

  • Question 9
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    Which of the following metals will replace copper from copper sulphate solution?

  • Question 10
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    P is a non metal, Q is a metal. Valency of Q is 2 and valency of P is 6. What will be the molecular formula of the compound formed by P and Q?

  • Question 11
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    Which of the following radicals is a polyatomic radical?

  • Question 12
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    Why is it necessary to balance a chemical equation?

  • Question 13
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    What does the delta sign used over an arrow in a chemical equation signify?

  • Question 14
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    Which of the following is changed while balancing an equation?

  • Question 15
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    2Fe +_ Cl2 2FeCl3
    Which of the following stoichiometric coefficients will precede chlorine to balance the above equation?

  • Question 16
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    Complete the following reaction:
    Zn + 2HCl _______ + H2

  • Question 17
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    36 g of water contains _______ of oxygen.

  • Question 18
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    C2H4 + 3O2 ? CO2 + 2H2O
    The above equation shows the combustion of ethane. How many molecules of carbon dioxide are produced during the combustion of one molecule of ethane?

  • Question 19
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    When ferrous sulphate is heated, an oxide of iron is obtained. What type of reaction is it?

  • Question 20
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    When ferrous sulphate is heated, an oxide of iron is obtained. What is the name of the oxide of iron obtained?

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