The principle of paper chromatography is partition. In paper chromatography, there are two phases: the stationary phase and the other is the... View Article
Scrubbers are devices used to remove gaseous pollutants. Scrubbing, sometimes referred to as flue gas desulfurization, is the most effect... View Article
Answer: An object float or sink when placed on the surface of the water because, Â An object sinks in water if its density is greater than... View Article
Potassium Chloride conducts electricity in a molten state. The movement of ions takes place only in a molten state The melting process frees... View Article
Carbohydrates can be represented by the stoichiometric formula (CH2O)n, where n is the number of carbons in the molecule. Therefore, the ratio of... View Article
A soft flap of tissue called the epiglottis closes over the windpipe when we swallow to prevent choking. The epiglottis prevents foods from... View Article
Sulphur dioxide is a compound and oxygen is in elemental form. They combine to form sulphur trioxide. A combination reaction is a general... View Article
The Law of Octaves was applicable only up to calcium, as after calcium, every eighth element does not possess properties similar to that of the... View Article
Magnesium ribbon burns in the air to form Magnesium oxide. This is a combination reaction as two reactants combine to form a single product.... View Article
Answer: Earth's atmosphere is a mixture of nitrogen (79%), oxygen (20%), and a small fraction of carbon dioxide, water vapours and other gases.... View Article
Newlands' classification of elements did not include noble gases. In 1866 an English scientist John Newlands arranged the elements to increase... View Article
The smaller the size of the solute particle, the greater is the solubility. The maximum amount of a substance that can be dissolved in a... View Article
A typical cell can produce about 0.7 W of electricity. It is a device that directly converts solar energy to electrical energy. A typical solar... View Article
Deficiency of Melanin results in skin Lesions and Albinism. Albinism is an inherited disease characterized by a substantially lower rate of... View Article
Poor skeletal growth occurs due to the deficiency of growth hormone. Growth hormone is a protein produced by the pituitary gland, located near... View Article
The lining of the larynx is made of stratified ciliated columnar epithelium. The larynx (voice box) is an organ located in the anterior neck.... View Article
Carbon dioxide constitutes about 0.04 % by volume in the air. Carbon dioxide is a colourless and non-flammable gas at normal temperature and... View Article
The specific latent heat of vaporization of water is 540 cal/g or 2260 J/g. The specific heat capacity is defined as the amount of heat needed... View Article
[Co(NH3)4Cl2]NO2 and [Co(NH3)4Cl(NO2)]Cl re examples of ionisation isomerism. Compounds that gives different ions in solution, although they... View Article
In Dobereiner's triad, elements showed similarities in properties. In 1817, Johann Dobereiner noticed that Strontium had similar chemical... View Article