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Test: Inter Halogens & Pseudo Halogens - NEET MCQ


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25 Questions MCQ Test - Test: Inter Halogens & Pseudo Halogens

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Test: Inter Halogens & Pseudo Halogens - Question 1

Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.

Q. 

Which of the following is not a pseudo halideion?

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 1

Pseudo halides are uni-negative charged similar to halideions.

Test: Inter Halogens & Pseudo Halogens - Question 2

The stability of interhalogen compounds follows the order

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 2

Electropositive character of halogens is in order I > Br > Cl . Central atom is bigger in size, more electropositive nature form stable interhalogen compound.

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Test: Inter Halogens & Pseudo Halogens - Question 3

Match the following molecules or ions to their shapes. Which pairing is correct? 

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 3

[I3]= Linear ; BrF= Square pyramidal; ClF3 = 'T' shaped

Test: Inter Halogens & Pseudo Halogens - Question 4

In XA5, the central atom has (both X and A are halogens)

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 4

It has square pyramidal shape and it has 5 bond pairs and one lone pair.

Test: Inter Halogens & Pseudo Halogens - Question 5

Which of the following pairs is isostructural? 

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 5

Both have sp3d2-hybridisation with sq uare pyramidal shape

Test: Inter Halogens & Pseudo Halogens - Question 6

Which of the following pairs shows correct match between formula and structure of a species?

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 6

[BrF2]= sp3, angular:
[ICI4]- = sp3d2, square planar;
IF5 = sp3d2, sqare pyramidal;
BrF3 = sp3d, T shaped 

Test: Inter Halogens & Pseudo Halogens - Question 7

HClO is known as

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 7

The correct answer is Option A.
IUPAC ID: hypochlorous acid, chloric(I) acid, chloranol, hydroxidochlorine
Formula: HClO
Molar mass: 52.46 g/mol
Soluble in: Water
Conjugate base: Hypochlorite

Test: Inter Halogens & Pseudo Halogens - Question 8

Which of the following is correct for CsBr3?

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 8

CsBr3 contains Cs+, Br- and lattice Br2 molecules respectively.

Test: Inter Halogens & Pseudo Halogens - Question 9

In the known interhalogen compounds, the maximum number of atoms are

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 9

In IF7, iodine is the least electronegative halogen, so its higher oxidation number (+7) is more stable than those of the lighter member of the group. So clearly there are a total of 8 atoms

Test: Inter Halogens & Pseudo Halogens - Question 10

Identify the interhalogen compound with zero dipole moment,

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 10

Due to pentagonal bipyramidal geometry, IF7 has zero dipole momen

*Multiple options can be correct
Test: Inter Halogens & Pseudo Halogens - Question 11

Direction (Q. Nos. 16-20) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.

Q. 

Identify the products formed at the electrodes upon electrolysis of molten ICI.

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 11

The correct answer is Option A, C.
Cl ionises as 2ICI ➝ I+ + ICl-2
At cathode, 2I+ + 2e- ➝ I2
At anode, 2ICl-2 ➝ I2 + 2Cl2 + 2e-

*Multiple options can be correct
Test: Inter Halogens & Pseudo Halogens - Question 12

When Cs[ICl2] undergo thermal dissociation, the products formed are

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 12

When a polyhalide containing more than one type of halogen atom undergo thermal dissociation, the metal monohalide is always formed, which has highest lattice energy. In this, CsCI has more lattice energy than Csl.

*Multiple options can be correct
Test: Inter Halogens & Pseudo Halogens - Question 13

Pseudo halogens among the following are

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 13

(CN)2, (OCN)2 and (SeCN)2 are pseudo halogens. 

*Multiple options can be correct
Test: Inter Halogens & Pseudo Halogens - Question 14

Which has both ionic and covalent bonding?

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 14


KI3(I—K . I—I); CsBr3(Br—Cs . Br—Br) all three have both ionic as well as covalent bonds But K2O (K—O—K) has only ionic bonds.

*Multiple options can be correct
Test: Inter Halogens & Pseudo Halogens - Question 15

Same hybridisation is present for the central atom in

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 15

 and both have sp3d2-hybridisation.

Test: Inter Halogens & Pseudo Halogens - Question 16

Direction (Q. Nos. 16 and 17) This section contains a paragraph, each describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).

Passage

When two different halogens react with each other, the compounds formed are called interhalogen compounds.
The general formula of these compounds is given by XX', , and .
Here, X = halogen of large size and more electropositive.
X' = halogen of smaller size and more electronegative,
e.g. CIF, ClF3, IF5, IF7, etc.
All are covalent and diamagnetic.
They are either volatile liquids or solids except CIF, BrF, CIF3, IF5 and IF7.
Interhalogen compounds are more reactive than halogens (except fluorine). The reason is X—X' bond in interhalogens is weaker than X—X bond in halogens (except F— F bond).
Hydrolysis of interhalogens Interhalogen compounds undergo hydrolysis giving halide ion derived from the smaller halogen and a hypohalite (when XX'), halite (when ), halate (when ) and perhalate (when ) n ion derived from the larger halogen.

XX' + H2O → HX + HOX  

Q. 

Which is more stable?

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 16

Thermal stability of diatomic interhalogen increases with increase in difference between the electronegativities of the halogen atoms.
Hence, increasing order of the stability of given interhalogens (in options) will be
BrCI < CIF < BrF < IF

Test: Inter Halogens & Pseudo Halogens - Question 17

When two different halogens react with each other, the compounds formed are called interhalogen compounds.
The general formula of these compounds is given by XX', , and .
Here, X = halogen of large size and more electropositive.
X' = halogen of smaller size and more electronegative,
e.g. CIF, ClF3, IF5, IF7, etc.
All are covalent and diamagnetic.
They are either volatile liquids or solids except CIF, BrF, CIF3, IF5 and IF7.
Interhalogen compounds are more reactive than halogens (except fluorine). The reason is X—X' bond in interhalogens is weaker than X—X bond in halogens (except F— F bond).
Hydrolysis of interhalogens Interhalogen compounds undergo hydrolysis giving halide ion derived from the smaller halogen and a hypohalite (when XX'), halite (when ), halate (when ) and perhalate (when ) n ion derived from the larger halogen.

XX' + H2O → HX + HOX  

Q. 

BrCI on hydrolysis produce

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 17

BrCL+ H2O → HOBr + HCL

Test: Inter Halogens & Pseudo Halogens - Question 18

Direction (Q. Nos. 18 and 19) This section is based on Statement I and Statement II. Select the correct answer from the codes given below.

Q. 

Statement I : Interhalogens are ionic compounds.

Statement II : Greater the difference in electronegativity of two different halogen atoms, more is the stability of their interhalogen compound.

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 18

Interhalogens are covalent compounds.

Test: Inter Halogens & Pseudo Halogens - Question 19

Statement I : Cyanide ions (CN-) are also called pseudo halogens.

Statement II : Cyanide ions make electrovalent bonds with electropositive elements like Na, K, etc.

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 19

Pseudo halogens have similar chemical properties as that of halogens like complex formation.

Test: Inter Halogens & Pseudo Halogens - Question 20

Direction (Q. No. 20) Choices fo r the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.

Q. 

Match the Column I with Column II and mark the correct option from the codes given below.

Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 20

*Answer can only contain numeric values
Test: Inter Halogens & Pseudo Halogens - Question 21

Direction (Q. Nos. 21-25) This section contains 5 questions. When worked out will result in an integer from 0 to 9 (both inclusive).

Q. 

How many pseudo halide ions are there, among the given ions?


Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 21

*Answer can only contain numeric values
Test: Inter Halogens & Pseudo Halogens - Question 22

In CIF3, if both lone pairs occupy axial positions then find the number of lone pair-bond pair repulsions.


Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 22

In this geometry, each lone pair is 90° with the bond pairs. Hence, lone pair-bond pair repulsions are six.

*Answer can only contain numeric values
Test: Inter Halogens & Pseudo Halogens - Question 23

How many of the given structures are isostructural with XeF4 


Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 23

*Answer can only contain numeric values
Test: Inter Halogens & Pseudo Halogens - Question 24

Find the sum of bond pairs and non-bonding electron pairs in ICI molecule.


Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 24

 3 lone pairs and 1 bond pair.

*Answer can only contain numeric values
Test: Inter Halogens & Pseudo Halogens - Question 25

Find the total number of covalent bonds present in cyanogens.


Detailed Solution for Test: Inter Halogens & Pseudo Halogens - Question 25

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