1
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

Which of the following is cross-linked polymer?

A
Teflon
B
Polythene
C
Nylon
D
Bakelite
2
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

The complex showing a spin-only magnetic moment of $$2.82 \mathrm{~BM}$$ is

A
$$\left[\mathrm{Ni}(\mathrm{Cl})_4\right]^{3-}$$
B
$$\left[\mathrm{NiCl}_4\right]^{2-}$$
C
$$\mathrm{Ni}\left(\mathrm{PPh}_3\right)_4$$
D
$$\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$$
3
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

In $$\mathrm{BrF}_3$$ molecule, the lone pairs occupy equatorial positions to minimise

A
lone pair-bond pair repulsion only
B
bond pair-bond pair repulsion only
C
lone pair-lone pair repulsion and lone pair-bond pair repulsion
D
lone pair-lone pair repulsion only
4
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

In electrophilic aromatic substitution reaction, the nitro group is meta-directing because it

A
decreases electron density at ortho-and para-positions
B
decreases electron density at meta-position
C
increases electron density at meta-position
D
increases electron density at ortho-and para-positions
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