Some Basic Concepts of Chemistry - Result Question 84

####22. The oxidation number of phosphorus in Ba(H2PO2)2 is

(a) +3

(b) +2

(c) +1

(d) -1

(1988)

Show Answer

Solution:

  1. Number of atoms = Number of moles

× Avogadro’s number (NA)

Number of atoms in 24gC=2412×NA=2NA

Number of atoms in 56g of Fe=5656NA=NA

Number of atoms in 27g of Al=2727NA=NA

Number of atoms in 108g of Ag=108108NA=NA

Hence, 24g of carbon has the maximum number of atoms.

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