19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The number of gram molecules of chlorine in 6.02×1025 hydrogen chloride molecule is (KCET 2007)
25 g of MCl4 contains 0.5 mole chlorine then its molecular weight is (Punjab PMET 2007)
The weight of one molecule of a compound C60H122 is (BHU 2007)
5.6 g of a metal forms 12.7 g of metal chloride. Hence equivalent weight of the metal is
Which of the following 1 g L–1 solution has the highest normality ?
Of two oxides of iron, the first contained 22% and the second contained 30% of oxygen by weight. The ratio of weights of iron in the two oxides that combine with the same weight of oxygen is (J&K CET 2008)
The equivalent weight of a metal is 9 and vapour density of its chloride is 59.25. The atomic weight of metal is (DUMET 2008)
A metal M of equivalent mass E forms an oxide of molecular formula MxOy. The atomic mass of the metals is given by the correct equation (BCECE 2008)
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
20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample ? (NEET 2015)
If Avogadro number NA, is changed from 6.022 × 1023 mol–1 to 6.022 × 1020 mol–1, this would change (NEET 2015)
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…
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…
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
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 …
Assertion (A) Molarity of a solution depends upon temperature. Reason (R) Volume of a solution is temperature dependent entity.
The density of a solution prepared by dissolving 120g of urea (mol. mass = 60 u) in 1000 g of water is 1.15g/mL. The molarity of this solution is
The crystalline salt Na2SO4.xH2O on heating loses 55.9% of its weight. The formula of crystalline salt is (Kerala CEE 2007)
The molarity of a solution obtained by mixing 750 mL of 0.5 M HCl with 250 ml of 2 M HCl will be
The number of water molecules is maximum in (NEET 2015)
What is the mass of the precipitate formed when 50 mL of 16.9% solution of AgNO3 is mixed with 50 mL of 5.8% NaCl solution? (Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 35.5) (NEET 2015)
Suppose elements X and Y combine to form two compounds XY2 and X3Y2. When 0.1 mol of XY2 weighs 10g and 0.05 mol of X3Y2 weighs 9g, the atomic weights of X and Y are (NEET 2016)
Which of the following is dependent on temperature? (NEET 2017)
In which case is number of molecules of water maximum? (NEET 2018)
The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber’s process is (NEET 2019)