Which element among the following has the highest melting point?

1. Cr

2. Fe

3. Cu

4. Mo

Subtopic:  d-Block Elements- Properties & Uses |
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The colour of KMnO4 is due to  :

1. d-d transition

2. Charge transfer spectra

3. Polarisation of ion

4. p-d transition

Subtopic:  Chemistry of Mn and Cr Compounds |
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Which of the following element does not show the variable oxidation state?

1. Fe

2. Mn

3. Cu

4. Zn

Subtopic:  d-Block Elements- Properties & Uses |
 86%
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With F highest stable oxidation state of Mn is

1. +6

2. +4

3. +7

4. +3

Subtopic:  d-Block Elements- Properties & Uses |
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Cr2O72-+XH+Cr3++H2O + oxidized product of X. X in the above reaction cannot be

1. C2O42-

2. Fe2+

3. SO42-

4. S2-

Subtopic:  Chemistry of Mn and Cr Compounds |
 55%
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Basic oxide amongst the following is:

1. CrO

2. Cr2O3

3. CrO3

4. Cr2O4

Subtopic:  d-Block Elements- Properties & Uses |
 63%
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A pair of ions having similar magnetic moments is:

1. Ti3+,V3+

2. Cr3+,Mn2+

3. Mn2+,Fe3+

4. Fe2+,Mn2+

Subtopic:  d-Block Elements- Properties & Uses |
 75%
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Lanthanoid which is radioactive is:

1. Promethium

2. Europium

3. Plutonium

4. Neptunium

Subtopic:  f-Block Elements- Properties & Uses |
 55%
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Actinide contraction is mainly related to:
1. Poor shielding by 5f subshell
2. Extraordinary decrement in Zeff
3. Both (1) and (2)
4. Strong shielding by 5f subshel

Subtopic:  Lanthanoid & Actinoids Contraction |
 61%
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From the following, which is the most basic hydroxide?

1. Ce(OH)3

2. Lu(OH)3

3. Yb(OH)3

4. Tb(OH)3

Subtopic:  f-Block Elements- Properties & Uses |
 61%
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