Some Basic Conc...

Boron has two stable isotopes, ¹⁰B(19%) and ¹¹B(81%). The atomic mass that should appear for boron in the periodic table is

The molecular weight of O₂ and SO₂ are 32 and 64 respectively. At 15^o C and 150 mm Hg pressure, one litre of O₂ contains ‘N’ molecules. The number of molecules in two litres of SO₂ under the same conditions of temperature and pressure will be :

The sulphate of a metal M contains 9.87% of M. This sulphate is isomorphous with ZnSO₄. 7H₂O. The atomic weight of M is

A 5 molar solution of H₂SO₄is diluted from 1 litre to a volume of 10 litres, the normality of the solution will be :

1.25g of a solid disbasic acid is completely neutralised by 25 mL of 0.25 molar Ba(OH)₂ solution. Molecular mass of the acid is

The law of multiple proportions was proposed by

0.115 g of pure sodium metal was dissolved in 500 mL distilled water. The normality of the solution would be [ Na = 23 ]

How many millilitres (mL) of 1 M H₂SO₄ solution is required to neutralise 10 mL of 1 M NaOH solution ?

Rearrange the following (I to IV ) in the order of increasing masses and choose the correct answer from (a), (b) ,(c) and (d) ( Atomic mass :N =14, O=16, Cu =63).
I. 1 molecule of oxygen
II. 1 atom of nitrogen
III. 1 × 10^-10 g molecular weight of oxygen
IV. 1 × 10^-10 g atomic weight of copper