Element A (atomic mass 112) and element B (atomic mass 27) form chlorides . Solutoins of these chlorides are electrolysed separately and it is found t

Question

Element A (atomic mass 112) and element B (atomic mass 27) form chlorides . Solutoins of these chlorides are electrolysed separately and it is found t

Element A (atomic mass 112) and element B (atomic mass 27) form chlorides . Solutoins of these chlorides are electrolysed separately and it is found that the same quantity of electricity is passed 5.6 gm of A deposited while only 0.9 gm of B was deposited . if the valency of B is 3 , the valency of A is
A. 2
B. 3
C. 4
D. `-2`

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - A
Equivalent mass of A = `("Atomic mass")/("valency") = (112)/(x)`
Equivalent mass of B = `("Atomic mass")/("valency") = (27)/(3) = 9`
`("Mass of A")/("Mass of B") = ("Equivalent mass of A")/("Equivalent mass of B") = (5.6)/(0.9)`
`therefore (112//x)/(9) = (5.6)/(0.9)`
`therefore x = (112 xx 0.9)/(9 xx 5.6) = 2`
Valency of A = 2