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1
JEE Main 2023 (Online) 13th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

The correct group of halide ions which can be oxidised by oxygen in acidic medium is :

A
$$\mathrm{Br}^{-}$$ only
B
$$\mathrm{Cl}^{-}, \mathrm{Br}^{-}$$ and $$\mathrm{I}^{-}$$ only
C
$$\mathrm{Br}^{-}$$ and $$\mathrm{I}^{-}$$ only
D
$$\mathrm{I}^{-}$$ only
2
JEE Main 2023 (Online) 13th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The covalency and oxidation state respectively of boron in $$\left[\mathrm{BF}_{4}\right]^{-}$$, are :

A
3 and 4
B
4 and 3
C
4 and 4
D
3 and 5
3
JEE Main 2023 (Online) 13th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

The incorrect statement from the following for borazine is :

A
It can react with water.
B
It is a cyclic compound.
C
It has electronic delocalization.
D
It contains banana bonds.
4
JEE Main 2023 (Online) 12th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement I : Boron is extremely hard indicating its high lattice energy.

Statement II : Boron has highest melting and boiling point compared to its other group members.

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 incorrect
B
Statement I is incorrect but Statement II is correct
C
Statement I is correct but Statement II is incorrect
D
Both statement I and Statement II are correct
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