JEE Main · 2009 · 12 Apr 2009 · Offline · Solid State

Which of the following material is not a semiconductor.

The values of conductivity of some materials at $298.15{\mathrm{K}}^{-1}{\mathrm{Sm}}^{-1}$ are $2.1\times 10^3$, $1.0\times 10^{-16}$, $1.2\times 10$, $3.91$, $1.5\times 10^{-2}$, $1\times 10^{-7}$, $1.0\times 10^3$. The number of conductors among the ma …

A compound is formed by two elements X and Y. The element Y forms cubic close packed arrangement and those of element X occupy one third of the tetrahedral voids. What is the formula of the compound?

Number of crystal systems from the following where body centred unit cell can be found, is.....

Cubic, tetragonal, orthorhombic, hexagonal, rhombohedral, monoclinic, triclinic.

The correct relationship between unit cell edge length 'a' and radius of sphere 'r' for face-centred and body centred cubic structures respectively are:

An atomic substance A of molar mass $12\mathrm{g}{\mathrm{mol}}^{-1}$ has a cubic crystal structure with edge length of 300 pm . The no. of atoms present in one unit cell of A is ____. (Nearest integer)

Given the density of A is $3.0\mathrm{g}{\mathrm{mL}}^{-1}$ and …