Group 17 elements

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1

F2

________ has yellow, Cl2 has greenish yellow, Br2 has red and I2 has violet color.

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2

Fluorine

________ doesnt have d- orbitals and hence cant expand its octet.

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3

Fluorine

________ and Chlorine are gases, Bromine is a liquid and Iodine is a solid.

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4

Marine life

________ contain Iodine in their systems; various seaweeds contain iodine too.

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5

greenish yellow gas

It is a(n) ________ with pungent and suffocating odor.

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6

Halogens

________ have the least atomic size in their respective periods because they have maximum effective nuclear charge.

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7

Fluorine

________ forms only two oxides OF2 and O2F2 among which only OF2 is thermally stable.

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8

ClO2

________ is used as a bleaching agent.

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9

I2O5

________ is a very good oxidizing agent used in the estimation of carbon monoxide.

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10

Affinity

________ for hydrogen decreases from fluorine to iodine.

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11

Astatine

________ is a radioactive element.

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12

Chlorine

________ is liberated at anode in electrolysis of brine.

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13

laboratory

In ________, it is prepared by heating sodium chloride with concentrated sulphuric acid.

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14

Ii

(________) Electrolytic process: Chlorine is obtained by the electrolysis of brine.

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15

Sea water

________ consists of chlorides, bromides, iodides of Sodium, Magnesium, Potassium and Calcium but as we know ________ majorly contains sodium chloride.

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16

Chlorine oxides

________, Cl2O, ClO2, Cl2O6 and Cl2O7 are highly reactive oxidizing agents and tend to.

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17

number of metals

It reacts with a(n) ________ and non- metals to form chlorides.

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18

ClF

They are all volatile solids or liquids at 298K except _____ which is a gas.

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19

oxidation of hydrogen chloride

(I) Deacons process: By ________ gas by atmospheric oxygen in the presence of CuCl2 (catalyst) at 723 K.

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20

Interhalogen compounds

In general, ________ are more reactive than halogens (except fluorine)

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21

Halogens

________ have maximum negative electron gain enthalpy in their respective periods, this is because they need only one electron to achieve the noble gas configuration.

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22

F2

Oxidizing ability of the halogens decreases down the group with ________ being a powerful oxidizing agent.

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23

Fluorine

________ behaves anomalously due to its small size, highest electronegativity, low bond dissociation enthalpy, and non availability of d orbitals in its valence shell.

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24

Chlorine

________ can be prepared by heating manganese dioxide with concentrated HCl or by the action of HCl on potassium permanganate.

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25

fluorine forms

Due to high electronegativity and small size, ________ only one oxoacid, HOF known as fluoric (I) acid or hypofluorous acid.

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26

Chlorine

________ is used in textile industries and in the manufacture of dyes, drugs, organic compounds, poisonous gases.

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27

Fluorine

________ is present in form of insoluble fluorides and also in teeth and bones of animals.

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28

Halogens

________ are highly reactive non- metals.

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29

Order of Atomic radius

I> Br> Cl> F

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30

Order of Ionization Enthalpies

F> Cl> Br> I

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31

Order of Electron Gain Enthalpy

Cl> F> Br> I this is because Fluorine has small size and has more interelectronic repulsions so the incoming electron doesnt face much attraction

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32

Order of electronegativity

F> Cl> Br> I> At

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33

Bond Dissociation enthalpies Order

Cl-Cl> Br-Br> I-I

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34

Order of Acidic strength

HF < HCl < HBr < HI

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35

Order of Bond dissociation enthalpy

H-F > H-Cl > H-Br > H-I

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36

Order of stability

H-F > H-Cl > H-Br > H-I

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37

Order of Bond length

HF < HCl < HBr < HI

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38

FACT 1

O2F2 oxidizes plutonium to PuF6 and the reaction is used in removing plutonium as PuF6 from spent nuclear fuel

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39

Order of stability of oxides

I> Cl> Br

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40

Order of Ionic character of Metal halides

MF > MCl > MBr > MI

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41

(i)Deacons process

By oxidation of hydrogen chloride gas by atmospheric oxygen in the presence of CuCl2 (catalyst) at 723 K

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42

(ii) Electrolytic process

Chlorine is obtained by the electrolysis of brine

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43

Formula of Bleaching powder

Ca(OCl)2.CaCl2.Ca(OH)2.2H2O

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44

Fact 2

The word Tear gas can be heard in most of the military themed movies but do you know its chemical formula

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