Class X Science MCQ Extra Questions Answers 10th Science Terminal Exam Based MCQ Extra Questions Class 10th Science Session 2022-23 Class XII Science Biology MCQ Solutions
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(i)Hydronium ions will be produced (ii)Heat is released during dissolution (iii)The process is endothermic (iv)Hydroxide ions will be produced
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 ...