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

What is the half life of a first order reaction if rate constant is $$4.2 \times 10^{-2}$$ per day?

A
5.0 day
B
16.5 day
C
28.0 day
D
9.0 day
3
MHT CET 2023 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

What type of solution is the ethyl alcohol in water?

A
Liquid in solid
B
Solid in liquid
C
Liquid in liquid
D
Gas in liquid
4
MHT CET 2023 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which among the following colours is obtained in Schiff test of aldehydes?

A
Blue
B
Green
C
Magenta
D
Black
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