Question 1: Palette 1/6

BITSAT 2025 MCQ

Electron affinity is maximum when

A

O changes into $\mathrm{O}^{-}$

B

Cl changes into $\mathrm{Cl}^{-}$

C

F changes into $\mathrm{F}^{-}$

D

N changes into $\mathrm{N}^{-}$

Question 2: Palette 2/6

BITSAT 2025 MCQ

The ionic radii of $\mathrm{N}^{3-}, \mathrm{O}^{2-}$ and $\mathrm{F}^{-}$follow the trend

A

$\mathrm{N}^{3-}>\mathrm{O}^{2-}>\mathrm{F}^{-}$

B

$\mathrm{F}^{-}>\mathrm{N}^{3-}>\mathrm{O}^{2-}$

C

$\mathrm{O}^{2-}>\mathrm{F}^{-}>\mathrm{N}^{3-}$

D

$\mathrm{F}^{-}>\mathrm{O}^{2-}>\mathrm{N}^{3-}$

Question 3: Palette 3/6

BITSAT 2024 MCQ

Electron affinity is positive, when

A

$ \mathrm{O}^{2} $ changes into $ \mathrm{O}^{-} $

B

$ \mathrm{O}^{-} $changes to $ \mathrm{O}^{2-} $

C

$ \mathrm{O}^{\text {changes into } \mathrm{O}^{+}} $

D

O changes to $ \mathrm{O}^{2+} $

Question 4: Palette 4/6

BITSAT 2024 MCQ

The ionic radii in $ \mathring{A} $ of $ \mathrm{N}^{3-}, \mathrm{O}^{2-} $ and $ \mathrm{F}^{-} $are respectively.

A

$ 1.71,1.40 $ and 1.36

B

$ 1.71,1.36 $ and 1.40

C

$ 1.36,1.40 $ and 1.71

D

$ 1.36,1.71 $ and 1.40

Question 5: Palette 5/6

BITSAT 2021 MCQ

Why only Xe can form compounds with fluorine among noble gases?

A

Large size

B

Low electronegativity

C

High ionisation energy

D

Low electron gain enthalpy

Question 6: Palette 6/6

BITSAT 2020 MCQ

Following statements regarding the periodic trends of chemical reactivity to the alkali metals and the halogens are given. Which of these statements gives the correct picture?

A

The reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number down the group.

B

In both the alkali metals and the halogens the chemical reactivity decreases with increase in atomic number down the group

C

Chemical reactivity increases with increase in atomic number down the group in both the alkali metals and halogens.

D

In alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group.