A mixer of Conc. HCl & Conc. HNO₃ in the ratio of 3:1, is known as “Aqua-Regia”. Gold dissolve only in aqua-regia.

(i)It turns lime water milky. (ii) it extinguishes burning splinter (iii) It dissolves in a solution of sodium hydroxide. (iv) It has a pungent odour.

Ca(OH)₂ (aq) + 2 NH₄Cl (g) → CaCl₂ (s) + 2H₂O (l) + 2NH₃ (g) ↑ So, X = NH₄Cl & Y= 2HO When base Ca(OH)₂ combines with ammonium salt, NH₄Cl, then it liberates ammonia gas and forms calcium ...

In first test tube, the following reactions involves: CaCO₃ + 2HCl → CO₂ + H₂O + CaCl₂ CO₂ Gas is evolved here. In second test tube the following reaction takes place: Zn + 2HCl → ZnCl₂ + H₂

You should know that, when lead nitrate is heated, it decomposes into lead monoxide, nitrogen dioxide and oxygen. Here, reaction is given for understanding: 2Pb(NO₃)₂ (s) → 2PbO(s) + 4NO₂ (g) + O₂ (g)

Lateral meristematic tissues, creates when girth of the steam increases. This increase in the diameter and girth of the plant and is called secondary growth. The apical Meristem is situated at the growing tips of stems, root and also at ...

Salt solution is made by mixing salt (NaCl) in water. It is homogeneous mixture because its constituents are uniformly distributed throughout, that is without any clear boundary of separation.

Ammonia contains nitrogen and hydrogen as NH₃. Both are non-metals. Whereas rust contains iron, quicklime has calcium and sodium chloride and sodium metal in its composition.