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

Sometimes, indigestion is caused by the secretion of too much hydrochloric acid in the stomach. To ease the pain caused, a tablet can be taken that reacts to reduce the amount of acid present. Which one among the following would be inappropriate for a manufacturer to include as a major reactant in the tablet?

Which of the following pairs is/are correctly matched?

1. Isotopes: Atoms with same atomic number but different atomic mass
2. Isobars: Atoms with same number of neutrons but different atomic number
3. Isotones: Atoms with same mass number but different atomic number

Select the correct answer using the code given below: