Chemistry - Salt Analysis Question with Solution | TestHub
When a substance, reacts with water, it produces a combustible gas and a solution of a substance, C in water. When another substance, D reacts with this solution of C , it also produces the same gas B on warming, but D can produce B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden-yellow colour to a smokeless flame of Bunsen burner. and D respectively are :
Options:
Answer:
Solution:
The question describes a series of reactions to identify substances A, B, C, and D.
A reacts with water to produce a combustible gas B and a solution C. A imparts a golden-yellow color to a flame, indicating it contains sodium (Na). Therefore, A is likely Na.
Na reacts with water:
B is hydrogen (), and C is sodium hydroxide ().
D reacts with NaOH to produce upon warming, and also reacts with dilute sulfuric acid to produce at room temperature. This suggests D is a metal that reacts with both base and acid to liberate hydrogen. Zinc (Zn) is amphoteric and fits this description.
Therefore, A is Na, B is , C is NaOH, and D is Zn.