A current of flowing for deposits of metal which is monovalent, the atomic mass of metal is:
Step 1: Given data
Electric current passed,
Time period during which current flows,
Weight of metal deposited,
Atomic mass of the metal,
Valency,
Step 2: Assumptions
Equivalent weight of the metal
Magnitude of Charge flowing
Faraday's constant,
Step 3: Formula used
…………………………….(a)
………………………(b)
………………………..(c)
Step 4: Calculation of the atomic mass of the metal
Substituting the given values in equation (a), we get
Substituting the given values and the value of charge obtained above in the equation (b), we get
Substituting the equivalent weight obtained above and the given valency of the metal in the equation (c), we get
Hence, option (B) is correct.