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Molarity equation of a mixture of solutions of same substance is given by (a) M V M V M V ... M M M x x x x (b) M V M V M V ... M V V V (c) M M M ... M V V V V V V (d) M M M ... M V V V V V V …
The final molarity of a solution made by mixing 50 mL of 0.5 M HCl, 150mL of 0.25 M HCl and water to make the volume 250 mL is
A standard solution of 0.165 M HCl is being used to determine the concentration of an unknown NaOH solution. If 25.5 mL of an acid solution are required to neutralize 15.0 mL of the base, what is the mo…
Assertion :When a solution is diluted from volume V1 to V2 by adding solvents, its molarity before dilution M1 and after dilution M2 are related as : M1V1 = M2V2 Reason:During dilution, moles of the solute remains co…
25 mL of a solution of Ba(OH)2 on titration with a 0.1 M solution of HCl gave a titre value of 35 mL. The molarity of barium hydroxide solution was
6.023 × 1020 molecules of urea are present in 100 mL of its solution. The concentration of urea solution is
To neutralize completely 20 mL of 0.1 M aqueous solution of phosphorus (H3PO3) acid, the volume of 0.1 M aqueous KOH solution required is
10 mL of N/2 HCl, 20 mL of N/2 H2SO4 and 30 mL N/3 HNO3are mixed together and solution made to one litre. The normality of the resulting solution is
0.115 g of pure sodium metal was dissolved in 400 ml distilled water. The normality of the above solution
50 ml of 10 N H2SO4, 25 ml of 12 N HCl and 40 ml of 5N HNO3 were mixed together and the volume of the mixture was made 1000 ml by adding water. The normality of the resulting solution will be
The normality of 0.3 M phosphorous acid (H3PO3) is
2H3PO4 + 3 Ca(OH)2Ca3(PO4)2 + 6 H2O Equivalent weight of H3PO4 in this reaction is
The vapour density of a chloride of an element is 39.5. The Ew of the elements is 3.82. The atomic weight of the element is
10 mL of 0.2 N HCl and 30 mL of 0.1 N HCl together exactly neutralises 40 mL of solution of NaOH, which is also exactly neutralised by a solution in water of 0.61 g of an organic acid.What is…
Which of the following 1 g L–1 solution has the highest normality ?
5.6 g of a metal forms 12.7 g of metal chloride. Hence equivalent weight of the metal is
The weight of one molecule of a compound C60H122 is (BHU 2007)
25 g of MCl4 contains 0.5 mole chlorine then its molecular weight is (Punjab PMET 2007)
The number of gram molecules of chlorine in 6.02×1025 hydrogen chloride molecule is (KCET 2007)
Gram molecular volume of oxygen at STP is (KCET 2007)
The crystalline salt Na2SO4.xH2O on heating loses 55.9% of its weight. The formula of crystalline salt is (Kerala CEE 2007)
An element, X has the following isotopic composition: 200X : 90% 199X : 8.0% 202X : 2.0% The weighted average atomic mass of the naturally occurring element X is closest to (AIPMT 2007)
Mass of 0.1 mole of methane is (KCET 2008)
The maximum number of molecules are present in (BCECE 2008)
Number of atoms of He in 100 u of He (atomic weight of He is 4) are (BCECE 2008)