Question

Write chemical equation what happens when zinc granules is treated with sulphuric acid, hydrochloric acid, aluminum chloride, sodium hydroxide

Answer 1

On heating blue coloured powder of copper (II) nitrate in a boiling tube, copper oxide (black), oxygen gas and a brown gas X is formed

Write a balanced chemical equation of the reaction.
Answer: 2Cu(NO3 )2 ⇨ 2Cu + 4NO2 + O2Identify the brown gas X evolved.
Answer: The brown gas 'X' is nitrogen dioxide.Identify the type of reaction.
Answer: This is a Decomposition reactionWhat could be the pH range of aqueous solution of the gas X?
Answer: Oxides of non-metals are acidic and hence, aqueous solution of this gas would be acidic. This means that its pH would be less then 7.