Group 17 Element

Front 1

______ & _____ are Last two members of group 17 . They are _____ .

Back 1

Astatine, Tennessine, radioactive

Front 2

Halogens in Greek means ____ .

Back 2

Salt producers

Front 3

Halogens are highly reactive, non metallic elements. T/F

Back 3

T

Front 4

Fluorine is present mainly as

Back 4

Insoluble fluorides

Front 5

CaF2 is known as ____

Back 5

Fluorspar

Front 6

Formula of fluoroapatite

Back 6

3Ca3(PO4) 2.CaF2

Front 7

Small quantities of fluorine present in

Back 7

Soil river water plants

Front 8

The deposits of dried up seas contain ___ and ____ .

Back 8

NaCl, Carnalite

Front 9

Formula of carnalite is

Back 9

KCl.MgCl2.6H2O

Front 10

If electron gain enthalpy of fluorine is - A and of chlorine is - B , how will you describe the electron gain enthalpy value of fluorine in relation to chlorine

Back 10

Ege of fluorine is less negative than that of chlorine

Front 11

Give the order of electron gain enthalpy of halogens

Back 11

Cl>F>Br>I

Front 12

Give the order of electronegativity of halogens

Back 12

F>Cl> Br> I

Front 13

Give the order of hydration energy of halogens

Back 13

F>>Cl>Br>I

Front 14

The melting and boiling point of halogens are directly proportional to ___ . Thus, they _____ down the group.

Back 14

Mass, increase

Front 15

Give the order of X----X distance of halogens

Back 15

I2> Br2 >Cl2 >F2

Front 16

Give the order of bond dissociation enthalpy of halogens

Back 16

Cl2 > Br2 > F2 > I2

Front 17

Give the order of melting point of hydrogen halides

Back 17

HI >HF>HBr>HCl

Front 18

Give the order of boiling point of hydrogen halides

Back 18

HF>HI>HBr>HCl

Front 19

Give the order of Bond length of hydrogen halides

Back 19

HI>HBr>HCl>HF

Front 20

Give the order of bond dissociation energy of hydrogen halides

Back 20

HF>HCl>HBr>HI

(Due to hydrogen bonding with respect to HF)

Front 21

Due to small size of fluorine atom there are strong ______ repulsions in the relatively small ____ orbitals of fluorine.

Back 21

Inter electronic, 2p

Front 22

Electron gain enthalpy of fluorine is less negative than that of chlorine due to ______ .

Back 22

Small size of fluorine atom

Front 23

Why Halogens have maximum negative electron gain enthalpy in their respective periods

Back 23

Due to smallest size in their respective periods they have high effective nuclear charge

Front 24

Halogens ______accept _____ electron to acquire noble gas electronic configuration

Back 24

Readily, one

Front 25

Bromine is a ___ while iodine is a _____ .

Back 25

Liquid, solid

Front 26

_____ halogens are coloured.

Back 26

All

Front 27

Halogens are coloured due to absorption of radiations in _____ region which results in the excitation of outer electrons to _____ energy level.

Back 27

Visible, higher

Front 28

Fluorine has ______, chlorine has _____, bromine ______ and Iodine ____ has colour.

Back 28

Yellow, greenish yellow, red, violet

Front 29

______ And ______ are only sparingly soluble in water while ____ and ____ react with water

Back 29

Bromine, Iodine fluorine, chlorine

Front 30

Which is stronger oxidizing agent fluorine or chlorine

Back 30

Fluorine

Front 31

Stronger oxidizing nature of fluorine is due to

I. ____ enthalpy of dissociation of F-F Bond

II. ____ hydration enthalpy of F-

Back 31

Low, high

Front 32

All halogens are highly _____ . The reactivity of the halogens ______ down the group.

Back 32

Reactive decreases

Front 33

________ Of an electron is the reason for the strong oxidizing nature of halogens

Back 33

Readily acceptance

Front 34

In general, a halogen oxidises ____ ions of _____ atomic number.

Back 34

Halide higher

Front 35

Why is enthalpy of dissociation of fluorine molecule small compared to chlorine molecule

Back 35

Due to large electron electron repulsion among the lone pairs in F2 molecule

Front 36

The relative oxidising power of halogens is illustrated by their reaction with

Back 36

Water

Front 37

Fluorine oxidizes water to

Back 37

Oxygen

Front 38

____ And ____ react with water to form corresponding _____ and _____ acids.

Back 38

Chlorine , bromine, hydrohalic hypohalous

Front 39

The reaction of water with iodine is

Back 39

Non spontaneous

Front 40

I- can the oxidised by oxygen in _____ medium

Back 40

Acidic

Front 41

F2 + H2O ------>

Back 41

HF + O2

Front 42

Cl2 + H2O ----->

Back 42

HCl + HOCl

Front 43

HI + O2 ----->

Back 43

I2 + H2O

Front 44

Fluorine when reacted with water, ____ water to ____ .

Back 44

Reduces, O2

Front 45

Ionic and covalent radii, melting and boiling point are quite _____ than expected for fluorine

Back 45

Lower

Front 46

Most of the reactions of fluorine are

Back 46

Exothermic

Front 47

Hydrogen fluoride is _____ due to _____ .

Back 47

Liquid, strong hydrogen bonding

Front 48

Other hydrogen halides are _____

Back 48

Gases

Front 49

Affinity for hydrogen _____ from fluorine to Iodine

Back 49

Decreases

Front 50

Hydrogen halides dissolve in water to form

Back 50

Hydrohalic acid

Front 51

Most of the oxides formed by halogens are

Back 51

Unstable

Front 52

Only ____ is thermally stable at 298 K

Back 52

OF2

Front 53

The oxides formed by halogens are essentially _____ because of the higher electronegativity of fluorine than oxygen

Back 53

Oxygen fluorides

Front 54

Fluorine forms two oxides ____ and _____ .

Back 54

OF2, O2F2

Front 55

Both the oxides of fluorine are ______ agents

Back 55

Strong fluorinating

Front 56

Oxidizes plutonium to _____ .

Back 56

PuF6

Front 57

A combination of kinetic and thermodynamic factors lead to the generally _____ order of stability of oxides formed by halogens

Back 57

Decreasing

Front 58

The higher oxides of halogens tend to be _____ stable than the lower ones

Back 58

More

Front 59

______ Is used as a bleaching agent for paper Pulp and Textiles and in water treatment

Back 59

ClO2

Front 60

The bromine oxides are ______ halogen oxides

Back 60

Least stable

Front 61

The bromine oxides exist only at ______ temperature

Back 61

Low

Front 62

_____ Oxides are very powerful oxidizing agent

Back 62

Bromine

Front 63

The iodine oxides are ______ solids

Back 63

Insoluble

Front 64

______ Oxides decompose on heating

Back 64

Iodine

Front 65

______ Iodine oxide is a very good oxidising agent

Back 65

I2O5

Front 66

______ Is used in the estimation of carbon monoxide

Back 66

I2O5

Front 67

Give the order of ionic character of metal halides

Back 67

MF>MCl>MBr>MI

Front 68

The halides in higher Oxidation State will be more _____ than the one in lower Oxidation State.

Back 68

Covalent

Front 69

SnCl4, PbCl4, SbCl5, UF6 are more covalent than

Back 69

SnCl2, PbCl2, SbCl3, UF4

Front 70

In XX', X' is a _____ size halogen

Back 70

Smaller

Front 71

Chlorine was discovered by ____ and ____ suggested the name chlorine on account of its ____ .

Back 71

Scheele, Davy, colour

Front 72

Cl2 can be prepared by ______ and _____ .

Back 72

MnO2, KMnO4

Front 73

Complete the reaction

MnO2 + 4HCl ------>

Back 73

MnCl2 + Cl2 + H2O

Front 74

NaCl + MnO2 + H2SO4 ----->

Back 74

MnCl2 + NaHSO4 + Cl2 + H20

Front 75

KMnO4 + HCl ------>

Back 75

KCl + MnCl2 + Cl2 + H2O

Front 76

Name the two processes for chlorine manufacture

Back 76

1. Deacon's process

2. Electrolytic process

Front 77

Give the catalyst of Deacon's process

Back 77

CuCl2

Front 78

Give the reagent of Deacon's process

Back 78

HCl + O2

Front 79

In electrolytic process, chlorine is obtained by the electrolysis of

Back 79

Brine

Front 80

Brine is

Back 80

Concentrated NaCl solution

Front 81

Chlorine is liberated at ____ in electrolytic process.

Back 81

Anode

Front 82

Chlorine is also obtained as a By-product in many chemical industries. T/F

Back 82

T

Front 83

Fluorine is about ____ times heavier than air

Back 83

2-5

Front 84

Chlorine is _____ in water

Back 84

Soluble

Front 85

Fe + Cl2 --->

Back 85

FeCl3

Front 86

P4 + Cl2 ----->

Back 86

PCl3

Front 87

S8 + Cl2 ----->

Back 87

S2Cl2

Front 88

Chlorine gas has great affinity for ____ .

Back 88

Hydrogen

Front 89

H2S + Cl2 ---->

Back 89

HCl+ S

Front 90

C10H16 + Cl2 ----->

Back 90

HCl + C

Front 91

With excess Ammonia, chlorine gives _____ and _____ .

Back 91

Nitrogen, ammonium chloride

Front 92

With excess of chlorine , _____ is formed

Back 92

Nitrogen trichloride

Front 93

8NH3 + Cl2 ---->

Back 93

NH4Cl + N2

Front 94

NH3 + Cl2 ---->

Back 94

NCl3 + HCl

Front 95

Nitrogen trichloride is

Back 95

Explosive

Front 96

With cold and dilute alkalies chlorine produces a mixture of _____ and _____ .

Back 96

Chloride, Hypochlorite

Front 97

With hot and concentrated alkalies chlorine produces ____ and ____ .

Back 97

Chloride, chlorate

Front 98

Back 98

Front 99

Back 99

Front 100

Back 100

Front 101

Give the composition of bleaching powder

Back 101

Front 102

Fluorine reacts with hydrocarbons to give ______ products with saturated hydrocarbons

Back 102

Substitution

Front 103

Chlorine reacts with hydrocarbons to give ____ products with _____ hydrocarbons

Back 103

Addition, unsaturated

Front 104

CH4 + Cl2 ---UV-->

Back 104

CH3Cl + HCl

Front 105

C2H4 + Cl2 --RTemp-->

Back 105

C2H4Cl2

Front 106

What happens to chlorine water on standing

Back 106

It loses its yellow colour

Front 107

The yellow colour of chlorine water on standing is lost due to formation of

Back 107

HCl and HOCl

Front 108

_____ gives nascent oxygen which is responsible for oxidizing and bleaching properties of chlorine

Back 108

Hypochlorous acid

Front 109

Hypochlorous acid

Back 109

HOCl

Front 110

Fluorine oxidizes ferrous to ____ and sulphite to _____ .

Back 110

Ferric, sulphate

Front 111

Chlorine oxidizes Sulphur Dioxide to _____ and Iodine to _____ .

Back 111

Sulphur trioxide, iodate

Front 112

In presence of _____ they form ______ and _____ respectively

Back 112

Water, sulphuric acid, iodic acid

Front 113

Give product

Back 113

Front 114

Chlorine is a powerful _____ agent. this action is due to _____ .

Back 114

Bleaching, oxidation

Front 115

Tear gas

Back 115

CCl3NO2

Front 116

Phosgene

Back 116

COCl2

Front 117

Mustard gas

Back 117

ClCH2CH2SCH2CH2Cl

Front 118

Bleaching effect of chlorine is

Back 118

Permanent

Front 119

Give the laboratory preparation of HCL

Back 119

NaCl + H2SO4 ----- >Na2SO4 + HCl

Front 120

HCL is a _____ smelling gas

Back 120

Pungent

Front 121

HCL reacts with Ammonia and gives ____ fumes of ___ .

Back 121

White, nh4cl

Front 122

In Aqua regia, ___ parts of concentrated HCL and ____ part of concentrated HNO3 are mixed.

Back 122

3, 1

Front 123

Back 123

Front 124

Back 124

Front 125

HCL is used for purifying

Back 125

Bone black

Front 126

Fe + 2HCl ---->

Back 126

FeCl2 +H2

Front 127

When HCL is reacted with finally powdered iron it forms _____ and not _____ .

Back 127

Ferrous chloride, ferric chloride

Front 128

Liberation of _____ prevents the formation of ferric chloride

Back 128

Hydrogen

Front 129

Fluorine forms only one oxo acid ____

Back 129

HOF

Front 130

HOF is k/a

Back 130

Fluoric acid

Front 131

HOF is also k/a (nickname)

Back 131

Hypofluorous acid

Front 132

Most of the oxoacids of halogen cannot be isolated in ____ state

Back 132

Pure

Front 133

Oxoacids of halogen are stable only in ____ or in the form of ______ .

Back 133

Aqueous solution, their salt

Front 134

Which oxo acid is formed only by chlorine

Back 134

Chlorous acid

Front 135

Give example of

Back 135

Front 136

Give structure of perchloric acid

Back 136

Front 137

Give structure of chloric acid

Back 137

Front 138

Give structure of chlorous acid

Back 138

Front 139

In XX', ____ is more electropositive than _____ .

Back 139

X, X'

Front 140

The inter halogen compounds can be prepared by ____ or by the action of ____ on _____ interhalogen compounds.

Back 140

Direct combination , halogen, lower

Front 141

Shape of XX'3

Back 141

Bent T shape

Front 142

Shape of XX'5

Back 142

Square pyramidal

Front 143

Shape of XX'7

Back 143

Pentagonal bipyramidal

Front 144

Interhalogen compounds are all ____ molecules

Back 144

Covalent

Front 145

Interhalogen compounds are _____ in nature

Back 145

Diamagnetic

Front 146

_____ Is a gas

Back 146

ClF

Front 147

Interhalogen compounds are generally _____ solids or _____ .

Back 147

Volatile, liquid

Front 148

The physical properties of interhalogen compounds are _____ between those of constituent halogens

Back 148

Intermediate

Front 149

The ____ and _____ are a little higher than expected

Back 149

Melting, bpt

Front 150

Inter halogen compounds are _____ reactive than halogens( except _______ )

Back 150

More, fluorine

Front 151

This is because _____ Bond in interhalogens is ______ than _____ Bond in halogens except _____ Bond.

Back 151

X-X', weaker, X-X, F-F

Front 152

Upon hydrolysis , _____ ion is formed from _____ halogen and various oxo acid are formed from _____ halogen

Back 152

Halide, smaller, larger

Front 153

BrF3 has ____ bond pairs and ____ lone pairs.

Back 153

3, 2

Front 154

In BrF3, ____ lone pairs will occupy the _____ positions to minimise ______ and _____ repulsions

Back 154

Two, equatorial, lone pair -lone pair, bond pair-lone pair

Front 155

_____ Fluorine atoms will be bent towards the _____ fluorine in order to minimise the ______ repulsions.

Back 155

Axial, equatorial, lone pair- lone pair

Front 156

BrF3 has a _____ shape

Back 156

Slightly bent 'T'

Front 157

Interhalogen compounds can be used as _____ solvents

Back 157

Non aqueous

Front 158

____ and ____ are used for production of ____ in the enrichment of ____ .

Back 158

UF6, U235