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JEE 2020 Chemistry : Mole Concept and Stoichiometry Quiz-2 : 11.06.2019
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Question 1
The ppm level of F- in a 500 g sample of a tooth paste containing 0 .2 g F- is
Question 2
The concentrated sulphuric acid that is peddled commercial is 95% H2SO4 by weight. If the density of this commercial acid is 1 .834 g cm-3, the molarity of this solution is
Question 3
The ratio of number of oxygen atoms(O) in 16.0 g ozone (O3) , 28.0 g carbon monoxide (CO) and 16 .0g oxygen (O2) is -
(Atomic mass: C=12, O=16 and Avogadro’s constant NA=6 .0x1023mol-1)
Question 4
The volume of gas A twice than that of gas B> The compressibility factor of gas A is thrice than that of gas B at same temperature. The pressure of the gases for equal number of moles are
Question 5
50 mL of 0.5 M oxalic acid is needed to neutralize 25 mL of sodium hydroxide solution. The amount of NaOH (in g) in 50 mL of the given sodium hydroxide solution is
Question 6
5 L of an alkane requires 25 L of oxygen for its complete combustion. If all volumes are measured at constant temperature and pressure, the alkane is:
Question 7
A sample of NaClO3 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 mol−1)
Question 8
The density (in g mL–1) of a 3.60 M sulphuric acid solution that is 29% H2SO4 (Molar mass = 98 g mol–1) by mass will be
Question 9
25 mL of a solution of barium hydroxide on titration with 0.1 molar solution of hydrochloric acid gave a titre value of 35 mL. The molarity of barium hydroxide solution was
Question 10
A sample of a hydrate of barium chloride weighing 61 g was heated until all the water of hydration is removed. The dried sample weighed 52 g. The formula of the hydrated salt is: (atomic mass, Ba=137 amu, Cl=35.5 amu)
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