Which of the following increasing order of oxidising power is correct for the following species?

           VO2+, MnO4-, Cr2O72-

(A) VO2+<Cr2O72-<MnO4-                           

(B) VO2+<MnO4-<Cr2O72-

(C) Cr2O72-<VO2+<MnO4-,                           

(D) Cr2O72-<MnO4-<VO2+

Subtopic:  d-Block Elements- Properties & Uses |
 67%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

In which of the following oxoanions the oxidation state of the central atom is not the same as that of its group number in the periodic table?

(A) MnO4-                               

(B) Cr2O72-

(C) VO43-                                 

(D) FeO42-

Subtopic:  d-Block Elements- Properties & Uses |
 56%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

At 300°C, FeCl3 :

1. Decomposes into FeCl2 and Cl2.               

2. Decomposes into Fe and Cl2.

3. Sublimes go give liquid FeCl3                         

4. Sublimes to give gaseous dimmer FeCl32.

Subtopic:  Chemistry of Mn and Cr Compounds |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

Anhydrous ferric chloride is prepared by

(1) Heating hydrated ferric chloride at a high temperature in a stream of air.

(2) Heating metallic iron in a stream of dry chlorine gas.

(3) Reaction of ferric oxide with HCl (aq).

(4) Reaction of metallic iron with HCl (aq).

Subtopic:  Chemistry of Mn and Cr Compounds |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Anhydrous ferrous sulphate on heating gives :

1. Both SO2 and SO3                         

2. SO2 only

3. SO3 only                                       

4. Fe2SO43 only

Subtopic:  Chemistry of Mn and Cr Compounds |
 60%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

FeCl3.6H2O+C CH32CH3O2Products

Reaction products are :

(A) FeCl3, CH3OH and CH3COCH3                       

(B) CH3OFe, HCl and H2O

(C) FeCl2, HCl and CH3COCH3                             

(D) FeOH3, FeCl3 and CH3COCH3

Subtopic:  d-Block Elements- Properties & Uses |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

Excess of Kl reactions with CuSO4 solution and Na2SO4 solution is added to it. Which of the following statement is incorrect for this reaction ?

(1) Evolved I2 is reduced                                     

(2) Cul2 is formed

(3) Na2S2O3 is oxides                                         

(4) Cu2l2 is formed.

Subtopic:  d-Block Elements- Properties & Uses |
 51%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Select the correct statement :

(1) PH3 reduces AgNO3 to metallic Ag.

(2) Organic tissues turn AgNO3 black by reducing it to Ag.

(3) AgCN is soluble in KCN.

(4) All are correct statements.

Subtopic:  d-Block Elements- Properties & Uses |
 80%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

The yellow colour solution of Na2CrO4 changes to orange-red on passing CO2 gas due to the formation of :

(1) CrO5                                         

(2) CrO3

(3) Na2Cr2O7                                 

(4) Cr2O3

Subtopic:  Chemistry of Mn and Cr Compounds |
 79%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

FeCr2O4+4Na2CO3+O2FusionX   H2O   H+YH2O2H+Z

Which of the following statements is true for the compounds [X], [Y] and [Z] ?

1. In all three compounds, the chromium is in +6 oxidation states.
2. [Z] is a deep blue-violet coloured compound which decomposes rapidly in aqueous solution into Cr3+and dioxygen.
3. Saturated solution of [Y] gives a bright orange compound, chromic anhydride, with concentrated H2SO4.
4. All of these
Subtopic:  Chemistry of Mn and Cr Compounds |
 79%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints