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Test: Ionic structure, Electrical and Magnetic properties - JEE MCQ


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10 Questions MCQ Test Chemistry for JEE Main & Advanced - Test: Ionic structure, Electrical and Magnetic properties

Test: Ionic structure, Electrical and Magnetic properties for JEE 2024 is part of Chemistry for JEE Main & Advanced preparation. The Test: Ionic structure, Electrical and Magnetic properties questions and answers have been prepared according to the JEE exam syllabus.The Test: Ionic structure, Electrical and Magnetic properties MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Ionic structure, Electrical and Magnetic properties below.
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Test: Ionic structure, Electrical and Magnetic properties - Question 1

KBr has rock salt type structural arrangements and has a density of 3.70 g/cm3. The edge length of the unit cell is approximately [molecular weight of KBr = 120 g/mol]

Detailed Solution for Test: Ionic structure, Electrical and Magnetic properties - Question 1

KBr has fcc type structural arrangement.
∴ Effective no. of atoms (z) in a unit cell = 4

Test: Ionic structure, Electrical and Magnetic properties - Question 2

The radii of and ions are and 181 pm respectively. The edge length of unit cell is

Detailed Solution for Test: Ionic structure, Electrical and Magnetic properties - Question 2

In a lattice, the distance between the cation and anion is equal to the sum of their radii, which is equal to half of the edge length of unit cell,

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Test: Ionic structure, Electrical and Magnetic properties - Question 3

CsBr has bcc structure with edge length 4.3. The shortest interionic distance in between Cs+ and Br is

Detailed Solution for Test: Ionic structure, Electrical and Magnetic properties - Question 3

For bcc structure, atomic radius,


Since, half the distance between two nearest neighbouring atoms.
∴ Shortest interionic distance

Test: Ionic structure, Electrical and Magnetic properties - Question 4
Which set of following characteristics for crystal is correct?
Detailed Solution for Test: Ionic structure, Electrical and Magnetic properties - Question 4
has cubic close packed structure. The ions are present at the corners of the cube and at the centre of each face. Zinc ions occupy half of the tetrahedral sites. Each zinc ion is surrounded by four sulphide ions which are disposed towards the corners of a regular tetrahedron. Similarly, ion is surrounded by four ions.
Test: Ionic structure, Electrical and Magnetic properties - Question 5
In type structure, the co-ordination number of and respectively are
Detailed Solution for Test: Ionic structure, Electrical and Magnetic properties - Question 5
The coordination number is for and
Test: Ionic structure, Electrical and Magnetic properties - Question 6

CsBr crystallises in a body centered cubic lattice. The unit cell length is 436.6pm. Given that the atomic mass of Cs = 133 and that of Br = 80amu and Avogadro number being 6.02 × 1023 mol−1 the density of CsBr is

Detailed Solution for Test: Ionic structure, Electrical and Magnetic properties - Question 6


Given two formula unit of in 1 cubic unit and edge length,
Molecular weight of CsBr .
Upon substituting the values in the above density equation:
Density

Test: Ionic structure, Electrical and Magnetic properties - Question 7

How many unit cells are present in 4.0gm of crystal AB (formula mass of AB = 40) having rock salt type structure? (NA = Avogadro's no.)

Detailed Solution for Test: Ionic structure, Electrical and Magnetic properties - Question 7

4 formula units of are present in a unit cell
∴ no. of unit cell
⇒ 0.025 NA

Test: Ionic structure, Electrical and Magnetic properties - Question 8
The ratio of is . Pick out the incorrect statements from the following?
Detailed Solution for Test: Ionic structure, Electrical and Magnetic properties - Question 8
ion is too small to fit into the octahedral voids of ions.
Test: Ionic structure, Electrical and Magnetic properties - Question 9
For , if is just like the rock salt like structure then, and are located at
Detailed Solution for Test: Ionic structure, Electrical and Magnetic properties - Question 9
is just like . Thus twelve are at edges and 1 within body of i.e. in octahedral voids and at faces and 8 at corner.
Test: Ionic structure, Electrical and Magnetic properties - Question 10

A molecule A2 B(Mwt. = 166.4) occupies triclinic lattice with a 5Å,b = 8Å, and c = 4Å If the density of AB2 is 5.2 g cm−3, the number of molecules present in one unit cell is

Detailed Solution for Test: Ionic structure, Electrical and Magnetic properties - Question 10

Volume of unit cell = a × b × c = 5 × 10−8 × 8 × 10−8 × 4 × 10−8
= 1.6 × 10−22 cm3

Number of molecules in one unit cell

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