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 |
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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 |
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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%
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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 |
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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%
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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%
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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%
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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%
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KMnO4 on treatment with conc. H2SO4 forms a compound (X) which decomposes explosively on heating forming (Y). The (X) and (Y) are respectively :

(A) Mn2O7, MnO2                                       

(B) Mn2O7, Mn2O3

(C) MnSO4, MnO2                                       

(D) Mn2O3-, MnO42-

Subtopic:  Chemistry of Mn and Cr Compounds |
 57%
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Which of the following products are formed when potassium bromide reacts with potassium permanganate in alkaline pH?

1. BrO3, MnO2                                     

2. BrO4, Mn2+

3. Br2, MnO2                                         

4. Br2O, MnO42

Subtopic:  Chemistry of Mn and Cr Compounds |
 56%
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