Which of the following is not an oxyacid of chlorine ?

Which one of the following is an oxyacid ?

Which of the following is more acidic oxyacid ?

Which one of the following oxyacids of chlorine is the least oxidizing in nature ?

Which of the following oxyacids of chlorine is formed on shaking chlorine water with freshly precipitated yellow oxide of mercury?

Write one oxyacid of chlorine.

Which one of the following does not form oxyacid ?