Which among the following is an element
Alumina is also known as Aluminium oxide. Silica is the other name of silicon dioxide. Brass is an alloy of copper and zinc. Graphite is an allotrope of carbon with an atomic number 6
Which among the following is a chemical change?
Which among the following is the major constituent of soda lime glass?
Which one among the following is the most appropriate statement with respect to the atomic weight of an element?
Which one among the following transitions of electron of hydrogen atom emits radiation of the shortest wavelength?
Which one among the following is the correct order of amount of lime (CaO), silica (SiO2), alumina (Al2O3) and ferric oxide (Fe2O3) in Portland cement