Chemistry Which one of the following is a micro-element ? Hydrogen Chlorine Oxygen Nitrogen Hydrogen Chlorine Oxygen Nitrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in Raman spectra Emission spectra Fluorescence Absorption spectra Raman spectra Emission spectra Fluorescence Absorption spectra ANSWER DOWNLOAD EXAMIANS APP
Chemistry The trans-uranium elements are the chemical elements with atomic numbers greater than 86 96 89 92 86 96 89 92 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The three elements most needed in common fertilisers are : Nitrogen, Potassium and Phosphorous Phosphorous, Sodium and Nitrogen Calcium, Phosphorous and Potassium Sulphur, Phosphorous and Sodium Nitrogen, Potassium and Phosphorous Phosphorous, Sodium and Nitrogen Calcium, Phosphorous and Potassium Sulphur, Phosphorous and Sodium ANSWER DOWNLOAD EXAMIANS APP
Chemistry The most important ore of lead is Pyrolusite Magnetite Galena Siderite Pyrolusite Magnetite Galena Siderite ANSWER DOWNLOAD EXAMIANS APP
Chemistry The unit of ionic product of water (Kw) is : Mol2 let-2 Mol-1 let-2 Mol-1 let-1 Mol2 let-1 Mol2 let-2 Mol-1 let-2 Mol-1 let-1 Mol2 let-1 ANSWER DOWNLOAD EXAMIANS APP
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