Match the following compounds with their corresponding physical properties: Column-I Column-II (a) IBr (i) Orange solid (b) ClF 3 (ii) Yellow-green liquid (c) BrF 3 (iii) Black solid (d) ICl 3 (iv) Colorless gas

( a − iii ) , ( b − iv ) , ( c − ii ) , ( d − i )

( a − ii ) , ( b − i ) , ( c − iv ) , ( d − ii )

( a − i ) , ( b − ii ) , ( c − ii ) , ( d − iv )

( a − iv ) , ( b − ii ) , ( c − i ) , ( d − iii )

The electron gain enthalpy (in kJ m o l ) of fluorine, chlorine, bromine and iodine, respectively, are

- 333 , - 349 , - 325 and - 296

- 296 , - 325 , - 333 and - 349

- 349 , - 333 , - 325 and - 296

- 333 , - 325 , - 349 and - 296

EASY

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Fluoride ion has higher hydration enthalpy than chloride ion. Give reasons.

Important Questions on Elements of Groups 16, 17 and 18

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Match the following compounds with their corresponding physical properties:

	Column-I		Column-II
(a)	$IBr$	(i)	Orange solid
(b)	${ClF}_{3}$	(ii)	Yellow-green liquid
(c)	${BrF}_{3}$	(iii)	Black solid
(d)	${ICl}_{3}$	(iv)	Colorless gas

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Why is

F_{2}

the strongest oxidizing agent (among halogens) although electron affinity of

{Cl}_{2}

is higher than

F_{2} ?

HARD

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Which of the following facts related to halogens is not correctly matched ?

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

The increasing order of the atomic radii of the following elements is:

(a) C

(b) O

(c) F

(d) C l

(e) B r

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Assertion (A) : The bond dissociation energy increases from $F_{2}$ to ${Cl}_{2}$ and then decreases to $I_{2}$

Reason (R) : The low bond energy of fluorine is due to the repulsion between the lone pairs of electrons in two fluorine atoms.
The correct option among the following is

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

The strongest reducing agent amongst the following is:

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Explain why: Fluorine has lower electron affinity than chlorine.

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

The electron gain enthalpy

Δ_{eg} H

Cl (g)

- 349 kJ {mol}^{- 1}

. If the ground state energy of

Cl (g)

x kJ {mol}^{- 1},

the ground state energy

(in kJ {mol}^{- 1})

{Cl}^{-} (g)

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Why are halogens coloured.

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

The most electronegative element belongs to _________

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

The electron gain enthalpy (in

\frac{kJ}{m o l}

) of fluorine, chlorine, bromine and iodine, respectively, are

HARD

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

What are the correct orders of bond lengths

d_{X - X}

and bond dissociation enthalpies

{BDE}_{X - X}

for

F_{2}

and

{Cl}_{2}

? (where

X = F

Cl

)

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Which halogen has the highest value of negative electron gain enthalpy?

HARD

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Account for the following statement :

Although fluorine has less negative electron gain enthalpy yet $F_{2}$ is strong oxidizing agent.

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Give reasons:

Halogens are coloured.

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Explain why halogens are coloured and the colour deepens on moving down in the group from fluorine to iodine.

EASY

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Which of the following has highest electron affinity?

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Arrange the following bonds according to their average bond energies in descending order:

C - C l, C - B r, C - F, C - I

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Groups 16, 17 and 18>Atomic and Physical Properties of Group 17 Elements

Which among the following does not form polyhalide ion?

Fluoride ion has higher hydration enthalpy than chloride ion. Give reasons.

Important Questions on Elements of Groups 16, 17 and 18

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