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

Which one among the following nitrogen compounds has the least percentage of nitrogen by mass

The following equation is an example of a redox reaction, in which Cl2 is the oxidizing agent and FeBr3 is the reducing agent:

2FeBr₃(aq) + 3Cl₂(g) = 2FeCl₃(aq) + 3Br₂(l)
Which one among the following statements if incorrect for this redox reaction?

Which of the following is not a micronutrient for a plant?

A glass of water does not turn into ice as it reaches 0^o C. It is because