A compound that has coloure in solid state is -

1. Ag2SO4

2.  CuF2

3. ZnF2

4. Cu2Cl2

Subtopic:  d-Block Elements- Properties & Uses |
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On addition of small amount of KMnO4, to concentrated H2SO4, a green oily compound is obtained which is highly explosive in nature. What is the compound ?
1. Mn2O7
2. MnO2
3. MnSO4
4. Mn2O3

Subtopic:  Chemistry of Mn and Cr Compounds |
 66%
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The magnetic nature of elements depends on the presence of unpaired electrons. Which of the configuration of transition element will shows highest magnetic moment ?

1. 3d7


2. 3d5


3. 3d8


4. 3d2

Subtopic:  d-Block Elements- Properties & Uses |
 89%
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There are 14 elements in actinoid series. Which of the following elements does not belong to this series?

1. U

2. Np

3. Tm

4. Fm

Subtopic:  f-Block Elements- Properties & Uses |
 66%
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The electronic configuration of gadolinium (atomic number of 64) is:

1. [Xe]4f35d56s2

2. [Xe]4f75d26s1

3. [Xe]4f75d16s2

4. [Xe]4f85d66s2

Subtopic:  d-Block Elements- Properties & Uses |
 80%
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The actinoid that can show oxidation states up to +7 is:

1. Am

2. Th

3. U

4. Np

Subtopic:  f-Block Elements- Properties & Uses |
 64%
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An actinoid that does not have one electron in its 6d orbital is -

1. U (Atomic number. 92) 2. Np (Atomic number. 93)
3. Pu (Atomic number. 94) 4. Cm (Atomic number. 96)
Subtopic:  f-Block Elements- Properties & Uses |
 55%
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Which of the following has the highest spin-only magnetic moment value?

1. Ti3+

2. Mn2+

3. Fe2+

4. Co3+

Subtopic:  d-Block Elements- Properties & Uses |
 83%
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Match the catalysts given in Column I with the processes given in Column II.

Column I - (Catalyst) Column II - (Process)
A. Ni in the presence of hydrogen 1. Contact process
B. Cu2Cl2 2. Vegetable oil to ghee
C. V2O5 3. Sandmeyer reaction
D. Finely divided iron 4. Haber's process
5.  Decomposition of  KClO3
 

Codes

A B C D
1. 3 4 2 5
2. 2 3 1 4
3. 5 4 3 2
4. 4 5 3 2
Subtopic:  d-Block Elements- Properties & Uses |
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Match the properties given in Column I with uses given in Column II 

Column I-(Property) Column II-(Metal)
A. An element that can show +8 oxidation state 1. Mn
B 3d block element that can show up to +7  2. Cr 
C 3d block element with the highest melting point 3. Os
4. Fe
 
A B C
1. 3 1 2
2. 1 2 3
3. 1 4 3
4. 4 2 3
Subtopic:  d-Block Elements- Properties & Uses |
 92%
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