Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Chemistry : The Solid State

Short Answer Type

231. With reference to crystal structure, what is meant by coordination number?

210 Views

232. What is the coordination number of atoms
(i) in a cubic close packed structure?
(ii) in a body-centred cubic structure?

199 Views

233. Calculate the efficiency (percentage of volume occupied and unoccupied) of packing in case of a metal crystal for simple cubic.

301 Views

234.

(a) Determine the type of cubic lattice to which a given crystal belongs if it has edge length of 290 pm and density is 7.80 g cm^–3. (Molecular mass.= 56 g mol^–1)

(b) Why does zinc oxide exhibit enhanced electrical conductivity on heating?

716 Views

235. The compound CuCl has the ZnS (Cubic) structure. Its density is 3.04 g cm^–3. What is the length of the edge of unit cell? (At. mass of Cu = 63.5, CI = 35.5)

593 Views

236. Potassium crystallises in a simple cubic unit cell. It has an atomic mass of 209 and its density is 91.5 g m^–3. What is the edge length of its unit cell?

202 Views

237. An element crystallises in fcc structure with an edge of 200 pm. Calculate density if 200 g of this element contains 24 x 10²³ atoms.

259 Views

238. The nearest neighbour Ag atoms in the silver crystal are 2.87 x 10^–10 m apart. What is the density of silver? Silver crystallises in fcc form.

1139 Views

239. The cell edge of a fcc element of atomic mass 108 is 409 pm. Calculate its density.

339 Views

240. An element ‘A’ of atomic mass 100 having bcc structure has unit cell edge of 400 pm. Calculate the density of ‘A’ and the number of unit cells for 10 g of ‘A’.

2394 Views