A solid has a structure in which W atoms are located at the corners of a cubic lattice. Oxygen atom at the centre of the edges and Na atom at centre of the cube. The formula of the compound is 

1. NaWO2

2. NaWO3

3. Na2WO3

4. NaWO4

Subtopic:  Introduction & Crystal System |
 73%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

An element (atomic mass = 100 g/mole) having a BCC structure has a unit cell edge of 400 pm. The density of the element is :
1. 2.14 g/cm3
2. 5.20 g/cm3
3. 7.28 g/cm3
4. 10.37 g/cm3

Subtopic:  Density & Packing Fraction |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The radius of Ag+ ion is 126 pm and that I- ion is 216 pm. The coordination number of Agion is

1. 2

2. 4

3. 6

4. 8

Subtopic:  Voids, Radius Ratio & Coordination Number |
 65%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Schottky defect occurs mainly in electrovalent compounds where :

1. Positive ions have large sizes.

2. Negative ions have small sizes.

3. Positive and negative ions are of similar size.

4. Positive ions are big and negative ions are small.

Subtopic:  Imperfections in Solids & Semiconductors |
 84%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Analysis shows that an oxide ore of  nickel has formula  Ni0.98O1.00. The percentage of nickel as Ni3+ ions is nearly

1. 2

2. 96

3. 4

4. 98

Subtopic:  Density & Packing Fraction |
 58%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The appearance of color in solid alkali metal halides is generally due to:-

1. Frenkel Defect

2. Interstitial Defect

3. F-Centres

4. Schottky Defect

Subtopic:  Imperfections in Solids & Semiconductors |
 87%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Ice crystallizes in a hexagonal lattice having the volume of the unit cell as 132×10-24 cm3. If the density is 0.92 g/cm3 at a given temperature, then the number of H2O molecules per unit cell is : 

1. 1

2. 2

3. 3

4. 4

Subtopic:  Density & Packing Fraction |
 70%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

AB crystallizes in a body-centred cubic lattice with edge length a equal to 387 pm. The distance between two oppositely charged ions in the lattice will be : 

1. 250 pm

2. 200 pm

3. 300 pm

4. 335 pm

Subtopic:  Introduction & Crystal System |
 66%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face
centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is

1.AB2

2.A2B3

3.A2B5

4.A2B

Subtopic:  Density & Packing Fraction |
 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Percentage of free space in cubic close packed structure and in body centered packed structure are respectively:

1. 48% and 26%

2. 30% and 26%

3. 26% and 32%

4. 32% and 48%

Subtopic:  Density & Packing Fraction |
 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh