In the form of dichromate, Cr(VI) is a strong oxidizing agent in acidic medium but Mo(VI) in MoO3andW(VI)inWO3arenotbecause

(a) Cr (VI) is more stable than Mo(VI) and W(VI)

(b) Mo (VI) and W (VI) are more stable than Cr(VI)

(c) Higher oxidation states of heavier members of group-6 of transition series are more stable.

(d) Lower oxidation states of heavier members of group-6 of transition series are more stable.

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

In d-block elements, for heavier elements, the higher oxidation states are more stable. Hence, Mo(Vl) and W(VI) are more stable than Cr (VI}. That's why Cr(VI) in the form of dichromate is a stronger oxidizing agent in acidic medium whereas MoO3andWO3 are not.