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Some Basic Concepts of Chemistry Test - 3

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Some Basic Concepts of Chemistry Test - 3
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  • Question 1
    4 / -1
    Percentage of Se in peroxidase anhydrase enzyme is 0.5% by weight (at. wt. = 78.4) then minimum molecular weight of peroxidase anhydrase enzyme is
  • Question 2
    4 / -1
    An organic compound containing C, H and O gave on analysis C – 40% and H – 6.66%. Its empirical formula would be
  • Question 3
    4 / -1
    How much calcium oxide (CaO) can be obtained by heating 200 Kg of lime stone theat is 95% pure CaCO3 ?
  • Question 4
    4 / -1
    Calculate the amount of NaOH required to neutralise 100 mL 0.1 M H2SO4
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  • Question 5
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    3g of an oxide of a metal is converted into chloride and it yielded 5 g of chloride. Find the equivalent weight of the metal.
    Solution

  • Question 6
    4 / -1
    A compound contains two oxygen atoms, four carbon atoms and number of hydrogen atoms is double of carbon atoms. What is the density of vapour of this compound ?
    Solution

  • Question 7
    4 / -1
    An organic compound containing C, H and N gave the following analysis : C = 40% ; H = 13.33% ; N = 46.67% Its empirical formula would be
    Solution

  • Question 8
    4 / -1
    Which one of the following statements is incorrect ?
  • Question 9
    4 / -1
    If the components of air are N2,78%, O2, 21% ; Ar, 0.9% and CO2, 0.1% by volume, what will be the molecular weight of air ?
    Solution

  • Question 10
    4 / -1
    In an experiment, 4 gm of M2Ox oxide was reduced to 2.8 gm of the metal. If the atomic mass of the metal is 56 gm/mol, the number of oxygen atoms in the oxide is
    Solution

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