Ncert Exercises & Solutions

In the form of dichromate, Cr(VI) is a strong oxidizing agent in acidic medium but Mo(VI) in $M o O_{3} a n d W (V I) i n W O_{3} a r e n o t b e c a u s e$

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

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

(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

M o O_{3} a n d W O_{3}

are not.

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