When neutral or faintly alkaline KMnO4 is treated with potassium iodide,
iodide ion is converted into 'X'. 'X' is:

1. I2

2. IO4-

3. IO3-

4. IO-

Subtopic:  Chemistry of Mn and Cr Compounds |
 75%
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The metal having a different lattice from those of others is

1. Co

2. Fe

3. Ag

4. Ni

Subtopic:  d-Block Elements- Properties & Uses |
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The correct order of E0(M2+/M) values with a negative sign for the four successive elements Cr, Mn, Fe and Co is

1. Mn > Fe > Co > Cr

2. Mn > Cr > Fe > Co

3. Fe > Mn > Cr > Co

4. Co > Fe > Mn > Cr

Subtopic:  d-Block Elements- Properties & Uses |
 57%
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The hardest lanthanide  is

1. La

2. Lu

3. Sm

4. Yb

Subtopic:  Lanthanoid & Actinoids Contraction |
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The unpaired  electron in Eu3+ will be the same in: 

1. Yb2+

2. Ho3+

3. Sm2+

4. Gd3+

Subtopic:  f-Block Elements- Properties & Uses |
 63%
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Primary component of Mischmetal that is commonly utilised in gas lighters is:

1. Cerium 
2. Iron
3. Samarium
4. Lanthanum

Subtopic:  d-Block Elements- Properties & Uses |
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The correct statement is

1. Green vitriol and blue vitriol are isomorphus

2. KMnO4 and K2Cr2O7 are coloured due to d-d transitions

3. Cu2Cl2 and Ag2S are coloured

4. Upon strong heating paramagnetic gases are evolved by CuSO4 and AgNO3

Subtopic:  d-Block Elements- Properties & Uses |
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Which is true about the ionic radius of M2+?

1. Ni2+<Cu2+<Zn2+

2. Ni2+>Cu2+>Zn2+

3. Cu2+<Ni2+<Zn2+

4. Zn2+<Ni2+<Cu2+

Subtopic:  d-Block Elements- Properties & Uses |
 53%
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Which of the following will not give a positive chromyl chloride test?

(1) CuCl2

(2) ZnCl2

(3) HgCl2

(4) NH4Cl

Subtopic:  d-Block Elements- Properties & Uses |
 54%
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Which of the following can not exist together in aqueous solution?

1. HgCl2 and SnCl2

2. HgCl2 and SnCl4

3. SnCl4 and FeCl3

4. SnCl4 and PbCl4

Subtopic:  d-Block Elements- Properties & Uses |
 52%
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