GROUP 7- Halogens

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What is the colour of flourine gas?
Very pale yellow gas
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What is the colour of chlorine gas?
Greenish
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What is the form of bromine?
REd liquid
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What gas is given off?
dense brown
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What is the form of Iodine?
Black solid, gives off purple gas
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What happens as you go down the group with MP and BP?
It increases
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Why does it increase?
The molecules become larger as they have more electrons so larger van der waals forces
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What happens with electronegativity?
It decreases
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Why?
The atomic radii increases due to the increasing number of shell
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What happens to the oxidising power?
It increases
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What are the colours in precipitate from Chlorine to Bromine and Iodine?
White, Cream and Pale yellow
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What is the reaction between NaF and H2SO4?
NaF + H2SO4 --> NaHSO4 +HF
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What is the observation?
White steamy fumes of HF
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What is the reaction between NaCL and H2SO4?
NaCl +H2SO4 ---> NaHSO4 + HCL
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What is the reduction product with Bromine?
Sulphur dioxide
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what can be observed?
White steamy fumes of HBr
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How can you tell if H2S is evolved?
A gas with a bad egg smell
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What insoluble precipitate can form?
Sulphur
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What else is evolved with the use of iodine?
Black solid and purple fumes
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Other cards in this set

Card 2

Front

What is the colour of chlorine gas?

Back

Greenish

Card 3

Front

What is the form of bromine?

Back

Preview of the front of card 3

Card 4

Front

What gas is given off?

Back

Preview of the front of card 4

Card 5

Front

What is the form of Iodine?

Back

Preview of the front of card 5
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