Caesium—com.
tests, 136
Calcium
biological importance, 124
compounds, 126-133
occurrence, 122
physical properties, 120
reactions, 125
tests, 136
Caliche, 319
Calomel, 437
cell, 99
Carbides. 174.200.201
Carbon
amorphous, 165
dioxide, 180-182
disulphide 201, 202
fibres, 164, 165
halides, 195, 196
monoxide, 176-180
properties, 161
reactions, 168-172
tests, 203, 204
Carbonates, 43, 44, 132, 133, 183-185
Carbonic acid, 183, 184
Carbonium ion, 155
Carbonyl chloride, 179, 180, 325
Carborundum, 26
Carnallite, 317
Cassitetite, 167
Cement, 297
Cerium, 440
(IV) ion, 106, 107
Chalcopyrite, 408
Charge-transfer, 60
Chloramine, 220
Chloric(I) acid and salts, 323, 338
chloric(III) acid and salts, 339
chloric(V) acid and salts, 339-341
chloric(VII) acid and salts, 341, 342
Chlorides, preparation of, 308
Chlorine
occurrence and extraction, 317, 318
oxides, 334-336
oxoacids, 337-342
properties, 310-316, 318
reactions, 320-326
tests, 348, 349
uses, 347
Chloromethane, 51, 52
Chlorophyll, 124
Chromates and dichromates. 376 17R
tests, 384
INDEX 449
Chromates and dichromates—cont.
uses, 380
Chromatography, 150
Chromium,
complexes, 380, 381
compounds, 377, 383
occurrence and extraction, 376
oxidation states, 362
physical properties, 360, 361
tests, 383, 384
uses, 376
Chromyl chloride, 377, 379
Cinnabar, 435
Clathrates, 367
Clay, 188
Cobalt
blue, 401
complexes, 368, 401^04
compounds, 402-405
oxidation states, 362
physical properties, 360, 361
tests, 405
Colour, 60
of transition compounds, 364, 365
Complex ions, 44
chemical properties, 366-368
colour. 364. 365
magnetic properties, 365, 366
shape, 364
Contact process, 298
Coordinate bond, 41
Coordination
complexes, 362-368
number, 36,46
Copper
chemical properties, 409
chloride, 180,410
complexes, 413, 416
compounds, 409-416
occurrence and extraction, 408
oxidation states, 362
physical properties, 360, 361, 426
pyrites, 408
sulphate and structure, 412
tests, 416
uses, 408
Corundum, 141, 150
Covalent ions, 42, 43
Cristobalite, 186
Cryogenics, 357
Cryolite, 141,316
Cupro-nickel, 408
Cyclotron, 443