Soap is prepared by boiling caustic soda with ___________? April 15, 2025 by admin A. Alcohol B. Kerosene oil C. Glycerine D. FatsThe most basic kind of soap is made from…
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ? April 15, 2025 by admin A. Radium dating B. Uranium dating C. Carbon dating D. Deuterium datingCarbon dating is the name of that system,…
Where does the oxygen that keeps us alive come from? April 15, 2025 by admin A. Carbon dioxide B. Carbonates absorbed from soil C. Oxides of minerals D. Water
The radio-active element used in heart pacemakers is ___________? April 15, 2025 by admin A. Uranium B. Deuterium C. Plutonium D. Radium
Optic fibres are used in : April 15, 2025 by admin A. CAT scans B. X-ray photos C. Ultrasound scans D. EndoscopyEndoscopes use optical fibres to produce an image of…
The snow on the mountains does NOT melt all at once when it is heated by the sun because: April 15, 2025 by admin A. it becomes very hard B. it reflects most of the heat from the sun C. it has a low specific heat capacity D. it has a high latent heat of fusionAt mountain,…
The source of the Sun’s energy is the process of ____________? April 15, 2025 by admin A. Photoelectric emission B. Nuclear fission C. Nuclear fusion D. Thermionic emission
Main use of salt in diet is to : ___________? April 15, 2025 by admin A. ease the process of cooking B. increase the taste C. produce small amount of hydrochloric acid required for digestion D. inclease solubility of food particles in water
Black foot disease is caused by the pollution of groundwater as a consequence of increased seepage of:__________? April 15, 2025 by admin A. Nitrates B. Fluorides C. Arsenic D. MercuryIn China (Province of Taiwan) exposure to arsenic via…
Atomic number of Mn is 25 what is the electronic configuration in the ground state________________? April 15, 2025 by admin A. 1s2 2s2 2p6 3s2 3p6 3d7 B. 1s2 2s2 2p6 3s2 3p6 4s2 4p5 C. 1s2 2s2 2p6 3s2 3p5 3d10 D. 1s2 2s2 2p6 3s2 3p6 4s23d5
