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Physical and Chemical Properties of Hydrogen

How halogens ...

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How halogens are +m? .due to their high electronegativity they acts as a -m

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The electronegativity of halogens decreases from fluorine to iodine while the electron affinity has the trend

C l > F > B r > I

. The halogens are good oxidizers The oxidizing power of halogens in aqueous medium depends on their electron affinity, bond dissociation energy and heat of hydration. Basic character of their anions depends on their size and electronegativity. Similarly, the ionic character of the salts of different halides of the same metal depends on their electronegativity and size.

The heat of hydration and the basic character of halide ions follow the order:

Q. How many external forces would appear to act on

(m_{2} + m_{3})

if they are considered as a system and

m_{1}

is considered as another system in the figure shown?

Q. In a period from alkali metal to halogens, the electronegativity :

Q. If true enter 1, else enter 0.
Both

{B F}_{3}

B {C l}_{3}

are colourless but they become coloured on exposure to light due to liberation of free halogens due to photolysis.

Q. What are the high-pressure regions also known as when they get created due to vibrations in a tuning fork?

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