1
JEE Main 2024 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The metals that are employed in the battery industries are

A. $$\mathrm{Fe}$$

B. $$\mathrm{Mn}$$

C. $$\mathrm{Ni}$$

D. $$\mathrm{Cr}$$

E. $$\mathrm{Cd}$$

Choose the correct answer from the options given below:

A
A, B, C, D and E
B
A, B, C and D only
C
B, D and E only
D
B, C and E only
2
JEE Main 2024 (Online) 30th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The orange colour of $$\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$$ and purple colour of $$\mathrm{KMnO}_4$$ is due to

A
Charge transfer transition in both.
B
$$\mathrm{d} \rightarrow \mathrm{d}$$ transitions in $$\mathrm{KMnO}_4$$ and charge transfer transitions in $$\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$$.
C
$$\mathrm{d} \rightarrow \mathrm{d}$$ transitions in both
D
$$\mathrm{d} \rightarrow \mathrm{d}$$ transitions in $$\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$$ and charge transfer transitions in $$\mathrm{KMnO}_4$$.
3
JEE Main 2024 (Online) 30th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Diamagnetic Lanthanoid ions are :

A
$$\mathrm{La}^{3+} \& \mathrm{~Ce}^{4+}$$
B
$$\mathrm{Nd}^{3+} \& \mathrm{~Ce}^{4+}$$
C
$$\mathrm{Lu}^{3+} \& \mathrm{~Eu}^{3+}$$
D
$$\mathrm{Nd}^{3+} \& \mathrm{~Eu}^{3+}$$
4
JEE Main 2024 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following acts as a strong reducing agent? (Atomic number: $$\mathrm{Ce}=58, \mathrm{Eu}=63, \mathrm{Gd}=64, \mathrm{Lu}=71$$)

A
$$\mathrm{Eu}^{2+}$$
B
$$\mathrm{Gd}^{3+}$$
C
$$\mathrm{Lu}^{3+}$$
D
$$\mathrm{Ce}^{4+}$$
JEE Main Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
CBSE
Class 12