ExamGOAL
Books
PreviousNext
2
MCQ (Single Correct Answer)

The electronic configuration of $\mathrm{Cu}(\mathrm{II})$ is $3 \mathrm{~d}^9$ where as that of $\mathrm{Cu}(\mathrm{I})$ is $3 \mathrm{~d}^{10}$. Which of the following is correct?

A
$\mathrm{Cu}(\mathrm{II})$ is more stable
B
$\mathrm{Cu}(\mathrm{II})$ is less stable
C
$\mathrm{Cu}(\mathrm{I})$ and $\mathrm{Cu}(\mathrm{II})$ are equally stable
D
Stability of $\mathrm{Cu}(\mathrm{I})$ and $\mathrm{Cu}(\mathrm{II})$ depends on nature of copper salts
3
MCQ (Single Correct Answer)

Metallic radii of some transition elements are given below. Which of these elements will have highest density?

Element Fe Co Ni Cu
Metallic radii/pm 126 125 125 128

A
Fe
B
Ni
C
Co
D
Cu
4
MCQ (Single Correct Answer)

Generally, transition elements form coloured salts due to the presence of unpaired electrons. Which of the following compounds will be coloured in solid state?

A
$\mathrm{Ag}_2 \mathrm{SO}_4$
B
$\mathrm{CuF}_2$
C
$\mathrm{ZnF}_2$
D
$\mathrm{Cu}_2 \mathrm{Cl}_2$
5
MCQ (Single Correct Answer)

On addition of small amount of $\mathrm{KMnO}_4$ to concentrated $\mathrm{H}_2 \mathrm{SO}_4$, a green oily compound is obtained which is highly explosive in nature. Identify the compound from the following.

A
$\mathrm{Mn}_2 \mathrm{O}_7$
B
$\mathrm{MnO}_2$
C
$\mathrm{MnSO}_4$
D
$\mathrm{Mn}_2 \mathrm{O}_3$
6
MCQ (Single Correct Answer)

The magnetic nature of elements depends on the presence of unpaired electrons. Identify the configuration of transition element, which shows highest magnetic moment.

A
$3 d^7$
B
$3 d^5$
C
$3 d^8$
D
$3 d^2$
PreviousNext