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Chemical Reactions And Bonding Test - 5

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Chemical Reactions And Bonding Test - 5
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following information is not conveyed by the chemical formula of a compound?
  • Question 2
    1 / -0
    HNO3 is the molecular formula of nitric acid. How many total number of atoms are present in one molecule of nitric acid?
    Solution

    Total number of atoms is nitric acid is 5.
    1 hydrogen atom
    1 nitrogen atom
    3 oxygen atoms

  • Question 3
    1 / -0
    What does the subscript 3 indicate in the formula of aluminium sulphate?
    Solution
    The formula of aluminium sulphate is: Al2(SO42-)3. It is clear from the formula, subscript 3 indicates that number of sulphate ions is 3.
  • Question 4
    1 / -0
    Which of the following subscript is omitted while writing the chemical formula of compound?
  • Question 5
    1 / -0
    Which of the following metals does not undergo corrosion?
    Solution

    Gold is highly unreactive and never undergoes corrosion.

  • Question 6
    1 / -0
    Which of the following names correctly represents the IUPAC name of the compound BF3?
  • Question 7
    1 / -0
    In a chemical reaction, _______ are (is) produced as a result of a chemical change.
    Solution

    A chemical reaction is a chemical change which forms new substances. The substances that participate in a chemical reaction are called reactants. The substances that are formed are called products.
    So, the correct option is 2.

  • Question 8
    1 / -0
    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?
    Solution

    Thus, the valency of metal Y is: +2.
  • Question 9
    1 / -0
    Which of the following metals will replace copper from copper sulphate solution?
  • Question 10
    1 / -0
    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
    1 / -0
    Which of the following radicals is a polyatomic radical?
  • Question 12
    1 / -0
    Why is it necessary to balance a chemical equation?
  • Question 13
    1 / -0
    What does the delta sign used over an arrow in a chemical equation signify?
  • Question 14
    1 / -0
    Which of the following is changed while balancing an equation?
    Solution
    The chemical equation needs to be balanced so that it follows the law of conservation of mass. A balanced chemical equation occurs when the number of the different atoms of elements on the reactants side is equal to that on the products side.
  • Question 15
    1 / -0
    2Fe +_ Cl2 2FeCl3
    Which of the following stoichiometric coefficients will precede chlorine to balance the above equation?
  • Question 16
    1 / -0
    Complete the following reaction:
    Zn + 2HCl _______ + H2
  • Question 17
    1 / -0
    36 g of water contains _______ of oxygen.
  • Question 18
    1 / -0
    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?
    Solution
  • Question 19
    1 / -0
    When ferrous sulphate is heated, an oxide of iron is obtained. What type of reaction is it?
    Solution

    It is a decomposition reaction because upon heating, ferrous sulphate decomposes to form ferric oxide (Fe2O3), sulphur dioxide (SO2) and sulphur trioxide (SO3).

  • Question 20
    1 / -0
    When ferrous sulphate is heated, an oxide of iron is obtained. What is the name of the oxide of iron obtained?
    Solution

    On heating, ferrous sulphate crystals lose water, and anhydrous ferrous sulphate (FeSO4) is formed. On further heating, anhydrous ferrous sulphate decomposes to form ferric (III) oxide (Fe2O3), sulphur dioxide (SO2) and sulphur trioxide (SO3).
    So, the correct option is 2.

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