1
MHT CET 2023 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following elements is doped with to obtain fibre amplifiers for optical fibre communication system?

A
Zn
B
Cu
C
Er
D
La
2
MHT CET 2023 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Identify lanthanoid element from following.

A
$$\mathrm{Eu}$$
B
$$\mathrm{Cm}$$
C
$$\mathrm{Am}$$
D
$$\mathrm{Np}$$
3
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is the stock notation of Manganese dioxide?

A
$$\mathrm{Mn}(\mathrm{I}) \mathrm{O}_2$$
B
$$\mathrm{Mn}(\mathrm{II}) \mathrm{O}_2$$
C
$$\mathrm{Mn}(\mathrm{III}) \mathrm{O}_2$$
D
$$\mathrm{Mn}(\mathrm{IV}) \mathrm{O}_2$$
4
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which from following statements regarding transition elements is NOT CORRECT?

A
These exhibit properties between '$$s$$' and '$$p$$' block elements.
B
These form cations with incomplete d-subshell.
C
5d series consists of all elements from lanthanum to mercury of periodic table.
D
These are arranged in four different '$$d$$' series.
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