The three states of matter are solid, liquid and gas. Which of the following statement is/are true about them?
Gases and liquids have viscosity as a common property
Both gases and liquid possess fluidity and hence, viscosity. Molecules in the solid state do not have translational motion.
Gold (at wt. 197g mol-1) crystallises is a cubic closest packed structures (the face – centred cubic) and has a density of 19.3g/cm2. Its atomic radius is
Calcium metal crystallizes in fcc lattice with edge length 556 pm. Calculate the density (in g cm-3) of metal if it contains 0.2% Schottky defects.
Which of the following statements about amorphous solids is incorrect?
An alloy of Cu, Ag and Au is found to have Cu forming the simple cubic closed packed lattice. If the Ag atoms occupy the face centres and Au is present at the body centre, the formula of the alloy will be
If the radius ratio is in the range of 0.414 – 0.732, then the coordination number will be
Quartz is a crystalline variety of
X – ray analysis shows that the unit cell length in NaCl is 562.8 pm. Calculate the density you would expect on this basis,
NA = 6.023 × 1023 mol-1.
If the distance between Na+ and Cl- ions in NaCl crystal is ‘a’ pm what is the length of the cell edge?
A crystalline solid
A compound is formed by elements A and B. this crystallizes in the cubic structure when atoms A are at the corners of the cube and atoms B are at the centre of the body. The simplest formula of the compound is