What happens when a chemical bond is formed ?
1). energy is always absorbed
2). energy in always released
3). more energy is released than is absorbed
4). energy is neither released nor absorbed
The element used in the manufacture of safety matches is
1). Phosphorous
2). Magnesium
3). Silicon
4). Sulphur
The function of skimming tank in sewage treatment is to remove
1). oil and fatty substances
2). suspended solids
3). Charcoal
4). Camphor
Photo oxidation process is initiated by
1). light
2). heat
3). oxygen
4). catalyst
One property of ammonia is
1). it is insoluble in water.
2). It is an odourless gas.
3). It is a yellowish gas
4). Its aqueous solution turns red litmus blue