AIPMT 2009 | Solid State Question 30 | Chemistry

AIPMT 2009

MCQ (Single Correct Answer)

-1

Copper crystallises in a face-centred cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm?

157

181

108

128

AIPMT 2008

MCQ (Single Correct Answer)

-1

With which one of the following elements silicon should be doped so as to give p-type of semiconductor?

Selenium

Boron

Germanium

Arsenic

AIPMT 2008

MCQ (Single Correct Answer)

-1

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

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.

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