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Some Basic Conc...

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  • Question 1
    1 / -0

    What is the mass of carbon dioxide which contains the same number of molecules as are contained in 40 g of oxygen?

  • Question 2
    1 / -0

    Match the column I with column II and mark the appropriate choice.

  • Question 3
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    The number of oxygen atoms present in 1 mole of oxalic acid dihydrate is

  • Question 4
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    The density of a gas is 1.78 g L-1 at STP. The weight of one mole of gas is

  • Question 5
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    Which of the following gases will have least volume if 10 g of each gas is taken at same temperature and pressure?

  • Question 6
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    How many number of molecules and atoms respectively are present in 2.8 litres of a diatomic gas at STP?

  • Question 7
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    Total number of atoms present in 34g of NH3 is

  • Question 8
    1 / -0

    What will be the mass of 100 atoms of hydrogen?

  • Question 9
    1 / -0

    How many atoms in total are present in 1 kg of sugar?

  • Question 10
    1 / -0

    How many moles of oxygen gas can be produced during electrolytic decomposition of 180 g of water?

  • Question 11
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    1.4 moles of phosphorus trichloride are present in a sample. How many atoms are there in the sample?

  • Question 12
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    What will be the standard molar volume of He, if its density is 0.1784 g/L at STP?

  • Question 13
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    In a mixture of gases, the volume content of a gas is 0.06% at STP. Calculate the number of molecules of the gas in 1 L of the mixture.

  • Question 14
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    What will be the weight of CO having the same number of oxygen atoms as present in 22 g of CO2?

  • Question 15
    1 / -0

    Match the mass of elements given in column I with the no. of moles given in column II and mark the appropriate choice.

  • Question 16
    1 / -0

    How many number of aluminium ions are present in 0.051 g of aluminium oxide?

  • Question 17
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    Which of the following correctly represents 180 g of water?
    (i) 5 moles of water
    (ii) 10 moles of water
    (iii) 6.023 x 1023 molecules ofwater
    (iv) 6.023 x 1024 molecules of water

  • Question 18
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    How many grams of CaO are required to react with 852 g of P4O10?

  • Question 19
    1 / -0

    How many oxygen atoms will be present in 88 g of CO2?

  • Question 20
    1 / -0

    A mixture having 2 g of hydrogen and 32 g of oxygen occupies how much volume at NTP?

  • Question 21
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    One atom of an element weighs 3.32 x 10-23 g. How many number of gram atoms are there in 20 kg of the element?

  • Question 22
    1 / -0

    Which of the following statements about Avogadro's hypothesis is correct?

  • Question 23
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    Fill in the blanks by choosing the correct options.

  • Question 24
    1 / -0

    The mass of one mole of a substance in grams is called its

  • Question 25
    1 / -0

    What is the total number of electrons present in 1.6 g of methane?

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