D And F Block Elements Question 17
Question 17 - 2024 (31 Jan Shift 1)
Identify correct statements from below:
A. The chromate ion is square planar.
B. Dichromates are generally prepared from chromates.
C. The green manganate ion is diamagnetic.
D. Dark green coloured $K _2 MnO _4$ disproportionates in a neutral or acidic medium to give permanganate.
E. With increasing oxidation number of transition metal, ionic character of the oxides decreases.
Choose the correct answer from the options given below:
(1) B, C, D only
(2) A, D, E only
(3) A, B, C only
(4) B, D, E only
Show Answer
Answer (4)
Solution
A. $CrO _4{ }^{2-}$ is tetrahedral
B. $2 Na _2 CrO _4+2 H^{+} \rightarrow Na _2 Cr _2 O _7+2 Na^{+}+H _2 O$
C. As per NCERT, green manganate is paramagnetic with 1 unpaired electron.
D. Statement is correct
E. Statement is correct
