Question

Arsenic forms two oxides, one of which contains 65.2% and the other 75.7% of the element. Hence, equivalent masses of arsenic are in the ratio

Solution

Correct option is

3 : 5

 

In first oxide,

                   Mass of arsenic = 65.2

                   Mass of oxygen = 34.8

                 Eq. mass of arsenic 

In second oxide,

                   Mass of arsenic = 75.7 g

                   Mass of oxygen = 24.3 g

                 Eq. mass of arsenic 

                   Eq. mass of arsenic : Eq. mass of arsenic

                  (oxide I)                 (oxide II)

                             14.99 : 24.92

or                                3 : 5

SIMILAR QUESTIONS

Q1

If 0.5 mole of  is mixed with 0.2 mole of  the maximum number of moles of  that can be formed is

Q2

Sodium nitroprusside when added to an alkaline solution of sulphide ions produces a colouration :

Q3

276 g of silver carbonate on being strongly heated yields a residue weighing

Q4

An organic compound contains 20.0% C, 6.66% H, 47.33% N and the rest was oxygen. Its molar mass is 60 . The molecular formula of the compound is

Q5

 

In the following reaction,

            

2 mol MnO2 reacts with 4 mol of HCl to form 11.2 L  at STP. Thus, per cent yield of  is 

Q6

In Kjeldahl’s method, nitrogen present is estimated as :

Q7

Two elements X (at. wt. 75) and Y (at. wt.16) combine to give a compound having 75.8% of X. the formula of compound will be

Q8

One atom of an element weighs  Its atomic mass is

Q9

 

In the following reaction, which choice has value twice that of the equivalent mass of the oxidising agent?  

             

Q10

The equivalent mass of chlorine is 35.5 and the atomic mass of copper is 63.5. The equivalent mass of copper chloride is 99.0. Hence, formula of copper chloride is