1
JEE Main 2024 (Online) 27th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following statements is not correct about rusting of iron?

A
Rusting of iron is envisaged as setting up of electrochemical cell on the surface of iron object.
B
Dissolved acidic oxides $$\mathrm{SO}_2, \mathrm{NO}_2$$ in water act as catalyst in the process of rusting.
C
Coating of iron surface by tin prevents rusting, even if the tin coating is peeling off.
D
When $$\mathrm{pH}$$ lies above 9 or 10, rusting of iron does not take place.
2
JEE Main 2024 (Online) 27th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following cannot function as an oxidising agent?

A
$$\mathrm{SO}_4^{2-}$$
B
$$\mathrm{MnO}_4^{-}$$
C
$$\mathrm{N}^{3-}$$
D
$$\mathrm{BrO}_3^{-}$$
3
JEE Main 2024 (Online) 27th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement (I) : In the Lanthanoids, the formation $$\mathrm{Ce}^{+4}$$ is favoured by its noble gas configuration.

Statement (II) : $$\mathrm{Ce}^{+4}$$ is a strong oxidant reverting to the common +3 state.

In the light of the above statements, choose the most appropriate answer from the options given below :

A
Both Statement I and Statement II are false
B
Statement I is true but Statement II is false
C
Both Statement I and Statement II are true
D
Statement I is false but Statement II is true
4
JEE Main 2024 (Online) 27th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Choose the correct option having all the elements with $$\mathrm{d}^{10}$$ electronic configuration from the following :

A
$${ }^{46} \mathrm{Pd},{ }^{28} \mathrm{Ni},{ }^{26} \mathrm{Fe},{ }^{24} \mathrm{Cr}$$
B
$${ }^{29} \mathrm{Cu},{ }^{30} \mathrm{Zn},{ }^{48} \mathrm{Cd},{ }^{47} \mathrm{Ag}$$
C
$${ }^{27} \mathrm{Co},{ }^{28} \mathrm{Ni},{ }^{26} \mathrm{Fe},{ }^{24} \mathrm{Cr}$$
D
$${ }^{28} \mathrm{Ni},{ }^{24} \mathrm{Cr},{ }^{26} \mathrm{Fe},{ }^{29} \mathrm{Cu}$$
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