AIPMT 2008 | Solid State Question 32 | Chemistry

If $$a$$ stands for the edge length of the cubic systems: simple cubic, body centred cubic and face centred cubic, then the ratio of radii of the spheres in these systems will be respectively

$${1 \over 2}a:{{\sqrt 3 } \over 2}a:{{\sqrt 2 } \over 2}a$$

$$1a:\sqrt 3 a:\sqrt 2 a$$

$${1 \over 2}a:{{\sqrt 3 } \over 4}a:{1 \over {2\sqrt 2 }}a$$

$${1 \over 2}a:\sqrt 3 a:{1 \over {\sqrt 2 }}a$$

AIPMT 2008

MCQ (Single Correct Answer)

-1

Out of Syllabus

Which of the following statements is not correct?

The number of carbon atoms in a unit cell of diamond is 4

The number of Bravais lattices in which a crystal can be categorized is 14

The fraction of the total volume occupied by the atoms in a primitive cell is 0.48.

Molecular solids are generally volatile.

AIPMT 2008

MCQ (Single Correct Answer)

-1

Out of Syllabus

Percentage of free space in a body centred cubic unit cell is

34%

28%

30%

32%

AIPMT 2007

MCQ (Single Correct Answer)

-1

Out of Syllabus

If NaCl is doped with 10^$$-$$4 mol% of SrCl₂, the concentration of cation vacancies will be (N_A = 6.02 $$ \times $$ 10²³ mol^$$-$$1)

6.02 $$ \times $$ 10¹⁶ mol^$$-$$1

6.02 $$ \times $$ 10¹⁷ mol^$$-$$1

6.02 $$ \times $$ 10¹⁴ mol^$$-$$1

6.02 $$ \times $$ 10¹⁵ mol^$$-$$1

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