Stomach acid, a dilute solution of HCl in water,can be neutralize

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 Multiple Choice QuestionsMultiple Choice Questions

321.

The molarity of a 0.2 N Na2CO5 solution will be :

  • 0.05 M

  • 0.2 M

  • 0.4 M

  • 0.1 M


322.

Ksp of CaSO4.5H2O is 9 ×10-6, find the volume for 1 g of CaSO4 (M.wt. = 136).

  • 2.45 litres

  • 5.1 litres

  • 4.52 litres

  • 3.2 litres


323.

Which ofthe following sequence contains atomic number of only representative elements?

  • 55,12,48,53

  • 13,33,54,80

  • 3,33,53,87

  • 22,33,55,66.


324.

100 cm3 of a given sample of H2O2 gives 1000 cm3 of O2 at S.T.P. The given sample is

  • 10% H2O2

  • 90% H2O2

  • 10 volume H2O2

  • 100 volume H2O2


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325.

Molarity of a given orthophosphoric acid solution is 3 M .It's normality is :

  • 9 N

  • 0.3 N

  • 3 N

  • 1 N


326.

Hydroxyl ion concentration of 10-2 M HCl is :

  • 1 x 101 mol dm-3

  • 1 x 10-12 mol dm-3

  • 1 x 10-1 mol dm-3

  • 1 x 10-14 mol dm-3


327.

When 25 g of Na2SO4 is dissolved in 10 kg of solution, its concentration will be

  • 2.5 ppm

  • 25 ppm

  • 250 ppm 

  • 100 ppm


328.

The volume of 10N and 4N HCl required to make 1 L of 7N HCl are :

  • 0.50 L of 10N HCl and 0.50 L of 4N HCl

  • 0.60 L of 10N HCl and 0.40 L of 4N HCl

  • 0.80 L of 10N HCl and 0.20 L of 4N HCl

  • 0.75 L of 10N HCl and 0.25 L of 4N HCl


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329.

Stomach acid, a dilute solution of HCl in water,can be neutralized by reaction with sodium hydrogen carbonate,

NaHCO3(aq)+ HCl(aq)NaCl(aq) + H2O(l) + CO2(g)

How many milliliters of 0.125 M NaHCO2 solution are needed to neutralize 18.0 mL of 0. 100 M HCl?

  • 14.4 ml

  • 12.0 mL

  • 14.0 mL

  • 13.2 ml


A.

14.4 ml

Given MHCl = 0.1M, VHCl = 18.0 ml

MNaHCO3 = 0.125M, VNaHCO3 = ?

On applying MHCl × VHCl = MNaHCO3 × VNaHCO3

0.1 × 18 = 0.125 × VNaHCO3

MNaHCO3 = 14.4 mL

Thus, 14.4 mL of the 1.25 M NaHCO3 solution is needed to neutralise 18.0 mL of the 0.100 M HCl solution.


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330.

Assertion : S. l. unit of atomic mass and molecular mass is kilograms.

Reason : Atomic mass is equal to the mass of 6.023x 1024atoms.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


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