Home › CBSE Class 11 › Chemistry › Electrochemical Series › Per NCERT §7.3 rules, the oxidation number of ch…
Per NCERT §7.3 rules, the oxidation number of chromium in K₂Cr₂O₇ is which?
A+6
B+3
C+7
D+4
Answer & Solution
Correct answer: A. +6
NCERT §7.3: 2(+1) + 2Cr + 7(−2) = 0 ⇒ 2Cr = +12 ⇒ Cr = +6.
Related questions
The electrolytes of the two half-cells are joined by a:The two portions of a galvanic cell are also called:In the Daniell cell, zinc dissolves at the anode and copper:A negative standard potential marks a reducing agent that is:Going from top to bottom of the table, the electrode potential:The weakest oxidising agent in the table of potentials is:The most powerful reducing agent in aqueous solution is:The weakest reducing agent in the table of potentials is: