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JEE Main Chemistry · Some Basic Concepts of Chemistry · Set 2 (Q31-60)

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  1. 31.
    The volume of acidified permanganate solution required for complete reaction of , of ion solution to from in is
    1. (1)60
    2. (2)20
    3. (3)40
    4. (4)6
  2. 32.
    A sample of is converted by heat to NaCl with a loss of 0.16 g of oxygen. The residue is dissolved in water and precipitated as AgCl. The mass of AgCl (in g) obtained will be: (Given: Molar mass of AgCl = 143.5 g )
    1. (1)0.35
    2. (2)0.54
    3. (3)0.41
    4. (4)0.48
  3. 33.
    Which of the following options is not correct?
    1. (1)
    2. (2)126,000 has 3 significant figures.
    3. (3)
    4. (4)
  4. 34.
    10 mL of 2 M NaOH solution is added to 20 mL of 1 M HCl solution kept in a beaker. Now, 10 mL of this mixture is poured into a volumetric flask of 100 mL containing 2 moles of HCl and made the volume upto the mark with distilled water. The solution in this flask is:
    1. (1)0.2 M NaCl solution
    2. (2)20 M HCl solution
    3. (3)Neutral solution
    4. (4)10 M HCl solution
  5. 35.
    The density (in g ) of a 3.60 M sulphuric acid solution that is 29% ( molar mass = 98 g ) by mass will be:
    1. (1)1.22
    2. (2)1.45
    3. (3)1.64
    4. (4)1.88
  6. 36.
    The number of grams of oxygen in of is approximately
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  7. 37.
    At what temperature, the Celsius and Fahrenheit readings have the same numerical value?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  8. 38.
    In which one of the following, does the given amount of chlorine exert the least pressure in a vessel of capacity at ?
    1. (1)
    2. (2)
    3. (3) molecules
    4. (4)0.02 mole
  9. 39.
    Consider the reaction
    (l) + 3KCl(s) (g) + NOCl(g) + O(g) + (s)
    The amount of required to produce 110.0 g or is :
    (Given : Atomic masses of H, O, N and K are 1, 16, 14 and 39, respectively.)
    1. (1)32.2 g
    2. (2)69.4 g
    3. (3)91.5g
    4. (4)162.5 g
  10. 40.
    Two students X and Y report the mass of the same substance as 7.0 g and 7.00 g respectively, which of the following statement is correct?
    1. (1)Both are equally accurate
    2. (2)X is more accurate than Y
    3. (3)Y is more accurate than X
    4. (4)Both are inaccurate scientifically
  11. 41.
    1.0 of is burnt with of in a closed vessel. Which reactant is left in excess and how much?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  12. 42.
    A commercially sold cone. HC1 is 35% HC1 by mass. If the density of this commercial acid is 1.46 g/mL, the molarity of this solution is : (Atomic mass : Cl = 35.5 amu, H = 1 amu)
    1. (1)10.2 M
    2. (2)12.5 M
    3. (3)14.0M
    4. (4)18.2M
  13. 43.
    The total number of valence electrons in 4.2 of ion is ( is the Avogadro’s number)
    1. (1)2.1
    2. (2)4.2
    3. (3)1.6
    4. (4)3.2
  14. 44.
    One gram of silver gets distributed between of molten zinc and of molten lead of . The percentage of silver in the zinc layer is approximately
    1. (1)89
    2. (2)91
    3. (3)97
    4. (4)94
  15. 45.
    The number of gram molecules of chlorine in hydrogen chloride molecules is
    1. (1)10
    2. (2)100
    3. (3)50
    4. (4)5
  16. 46.
    g of a substance ‘X’ occupies 1.81. What will be its density measured in correct significant figures?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  17. 47.
    The vapour density of in is 40 . The degree of dissociation is
    1. (1)1.25
    2. (2)2.50
    3. (3)1.50
    4. (4)0.15
  18. 48.
    The result of the operation should be which of the following on the basis of significant figures?
    1. (1)3.125
    2. (2)3.13
    3. (3)3.1
    4. (4)31.25
  19. 49.
    Which one of the followings has maximum number of atoms?
    1. (1)1 g of [Atomic mass of ]
    2. (2)1 g of (g) [Atomic mass of ]
    3. (3)1 g of [Atomic mass of ]
    4. (4)1 g of [Atomic mass of ]
  20. 50.
    Which one of the following has maximum number of atoms of oxygen?
    1. (1) of carbon monoxide
    2. (2) of carbon dioxide
    3. (3) of sulphur dioxide
    4. (4) of water
  21. 51.
    The number of significant figures in value of are:
    1. (1)1
    2. (2)2
    3. (3)3
    4. (4)
  22. 52.
    Production of iron in blast furnace follows the following equation
    (s) + 4CO(g) 3Fe(l) + (g)
    when 4.640 kg of and 2.520 kg of CO are allowed to react then the amount of iron (in g) produced is :[Given : Molar Atomic mass (g ): Fe = 56
    Molar Atomic mass (g ) : O = 16
    Molar Atomic mass (g ): = C = 12
    1. (1)1400
    2. (2)2200
    3. (3)3360
    4. (4)4200
  23. 53.
    50 mL of 0.5 M oxalic acid is needed to neutralize 25 mL of sodium hydroxide solution. The amount of NaOH in 50 mL of the given sodium hydroxide solution is :
    1. (1)40 g
    2. (2)10 g
    3. (3)20 g
    4. (4)4g
  24. 54.
    In the reaction + → + + (g)
    1. (1)6L is consumed for every 3L produced.
    2. (2)33.6 L is produced regardless temperature and pressure for every moles that reacts.
    3. (3)67.2 L at STP is produced for every mole of Al that reacts.
    4. (4)11.2 L at STP is produced for every mole of consumed.
  25. 55.
    Volume of (formula weight ) which can be prepared from of is_______ .
  26. 56.
    Molarity (M) of an aqueous solution containing of anhyd. in solution at is . Its molality will be _____ . (nearest integer). [Given density of the solution
  27. 57.
    56.0 L of nitrogen gas is mixed with excess of hydrogen gas and it is found that 20 L of ammonia gas is produced. The volume of unused nitrogen gas is found to be____ L.
  28. 58.
    Number of hydrogen atoms per molecule of a hydrocarbon A having 85.8% carbon is_________ (Given : Molar mass of A = 84 g )
  29. 59.
    A student performs a titration with different burettes and finds titre values of 25.2 mL, 25.25 mL, and 25.0 mL. The number of significant figures in the average titre value is :
  30. 60.
    4.5 g of compound A (MW = 90) was used to make 250 mL of its aqueous solution. The molarity of the solution in M is . The value of x is ____. (Rounded off to the nearest integer)