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1
JEE Main 2023 (Online) 15th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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For a good quality cement, the ratio of silica to alumina is found to be :
A
1.5
B
2
C
3
D
4.5
2
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
3
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
4
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.
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