What colour would the precipitate formed be if a few drops of Aqueous Ammonia is added to solution Zinc Nitrate?

A few drops of aqueous Sodium Hydroxide is added to a testtube of Iron(II) Nitrate solution and was left standing at the table for a few minutes. What is the precipitate's colour?

A colourless pungent gas evolved upon warming after aqueous Sodium Hydroxide was added to a solution of aqueous Ammonium Sulfate. What is the gas that evolved?

Dilute Nitric Acid is added to Solution X, followed by aqueous Silver Nitrate. It is observed that there is a white precipitation forming. What could X possibly be?

Aqueous Ammonia is added to Solution Y and the resulting precipitate is found to be insoluble in excess Aqueous Ammonia . What could Solution Y possibly be?

Uranium exists commonly as Uranium-235 and Uranium-238. These are called isotopes. What would clearly define an isotope?

Francium reacts vigorously with water to produce a strong alkaline solution. What would the formula of francium hydroxide most probably be?

Which of the following would give a half-filled set of p-orbital if an electron is removed?

4. Which of the following would have the highest chances of forming a 2+ ion?

What would the electronic configuration of Ar3+?

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