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NEET Chemistry · Some Basic Concepts of Chemistry · Set 5 (Q121-150)

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  1. 121.
    An organic compound contains , and . Its emperical formula is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  2. 122.
    The number of water molecules is maximum in
    1. (1)1.8 gram of water
    2. (2)18 grams of water
    3. (3)18 moles of water
    4. (4)18 molecules of water.
  3. 123.
    The molarity of a solution obtained by mixing 750 mL of 0.5(M) HCl with 250 mL of 2(M)HCl will be:
    1. (1)0.875 M
    2. (2)1.00 M
    3. (3)1.75 M
    4. (4)0.975 M
  4. 124.
    The amount of heat evolved when of is mixed with of is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  5. 125.
    The elemental composition of a compound is and . If the molar
    mass of the compound is , the molecular formula of the compound is : [Given : The relative atomic mass of
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  6. 126.
    Percentage of Se in peroxidase anhydrous enzyme is 0.5% by weight then minimum molecular weight of peroxidase anhydrous enzyme is
    1. (1)
    2. (2)
    3. (3)15.68
    4. (4)
  7. 127.
    A metal chloride contains 55.0% of chlorine by weight. 100 mL vapours of the metal chloride at STP weigh 0. 57 g. The molecular formula of the metal chloride is (Given: Atomic mass of chlorine is 35. 5 u)
    1. (1)
    2. (2)
    3. (3)
    4. (4)MCI
  8. 128.
    The molality of a urea solution in which 0.0100 g of urea, [CO] is added to 0.3000 of water at STP is:
    1. (1)5.55 ×
    2. (2)33.3 m
    3. (3)3.33 × m
    4. (4)0.555 m
  9. 129.
    of methane is completely burnt using of oxygen. The volume of the gas left after cooling to room temperature is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  10. 130.
    Compound A contains 8.7% Hydrogen, 74% Carbon and 17.3% Nitrogen. The molecular formula of the compound is, Given : Atomic masses of C, H and N are 12, 1 and 14 amu respectively.The molar mass of the compound A is 162 g .
    1. (1)
    2. (2)N
    3. (3)N
    4. (4)
  11. 131.
    If one atom of an element weighs . Then, find the number of moles of atoms in of element .
    1. (1)500 moles
    2. (2)125 moles
    3. (3)1250 moles
    4. (4)50 moles
  12. 132.
    of is titrated against solution. The titration is discontinued after adding of . The remaining titration is completed by adding . The volume of required for completing the titration is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  13. 133.
    What is the atomic mass of ?
    Given abundance of
    1. (1)55.65
    2. (2)55.75
    3. (3)55.85
    4. (4)55.95
  14. 134.
    During the process of fermentation, the number of moles of liberated from one mole of glucose is
    1. (1)2
    2. (2)3
    3. (3)4
    4. (4)1
  15. 135.
    One gram of silver gets distributed between of molten zinc and of molten lead at . The percentage of silver still left in the lead layer is approximately
    1. (1)2
    2. (2)5
    3. (3)3
    4. (4)1
  16. 136.
    What is the atomicity of aluminium phosphate?
    1. (1)8
    2. (2)6
    3. (3)5
    4. (4)13
  17. 137.
    Which of the following concentration terms depends on temperature?
    1. (1)Molality
    2. (2)Molarity
    3. (3)Mole fraction
    4. (4)Percent by mass
  18. 138.
    6.02 × molecules of urea are present in 100 ml of its solution. The concentration of urea solution is –
    1. (1)0.001 M
    2. (2)0.01 M
    3. (3)0.02 M
    4. (4)0.1 M
  19. 139.

    Consider the above reaction, what mass of will be formed if 250 mL of 0.76 M HCl reacts with 1000 g of ?
    (Given : Molar mass of Ca, C, O, H and Cl are 40, 12, 16, 1 and 35.5 g mol, respectively)
    1. (1)3.908 g
    2. (2)2.636 g
    3. (3)10.545 g
    4. (4)5.272 g
  20. 140.
    Which of the following gases will have least volume if 10 g of each gas is taken at same temperature and pressure?
    1. (1)
    2. (2)
    3. (3)
    4. (4)HCl
  21. 141.
    For a reaction, identifydihydrogen as a limiting reagent in the following reaction mixtures.
    1. (1)56 g of of
    2. (2)35 g of of
    3. (3)28 g of of
    4. (4)14 g of of
  22. 142.
    0.24 of a volatile gas, upon vaporisation, gives 45 vapour at NTP What will be the vapour density of the substance? Density of
    1. (1)95.93
    2. (2)59.93
    3. (3)95.39
    4. (4)5.993
  23. 143.
    For a given unbalanced reaction,
    , which is the limiting reagent, if the initial amount for each of the reactant is 100 grams?
    [Molar masses :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  24. 144.
    The oxidation state of Cr in is:
    1. (1)+ 3
    2. (2)+ 2
    3. (3)+ 1
    4. (4)0
  25. 145.
    A bivalent metal has an equivalent mass of 32. The molecular mass of the metal nitrate is
    1. (1)168
    2. (2)192
    3. (3)188
    4. (4)182
  26. 146.
    5 moles of weigh kg and 10 moles of weigh kg. The molar mass of A and molar mass B in kg are :
    1. (1)and
    2. (2)and
    3. (3)and
    4. (4)and
  27. 147.
    Combustion of glucose produces and water. The amount of oxygen (in required for the complete combustion of of glucose is : [Molar mass of glucose in ]
    1. (1)480
    2. (2)800
    3. (3)960
    4. (4)32
  28. 148.
    The number of moles of oxygen in one litre of air containing 21% oxygen by volume, under standard conditions, is
    1. (1)0.0093 mol
    2. (2)2.10 mol
    3. (3)0.186 mol
    4. (4)0.21
  29. 149.
    The number of gram molecules of oxygen in 6.02 CO molecules is
    1. (1)10 molecules
    2. (2)5 molecules
    3. (3)1 molecules
    4. (4)0.5 molecules.
  30. 150.
    The density of a solution prepared by dissolving 120 g of urea (mol. mass = 60 u) in 1000 g of water is 1.15 g/mL. The molarity of this solution is:
    1. (1)0.50 M
    2. (2)1.78 M
    3. (3)1.02 M
    4. (4)2.05 M