When a substance reacts with water, it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with this solution of C, it produces the same gas B on warming but D can produces gas B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow color to a smokeless flame of Bunsen burner. A, B, C and D respectively are.....

When a substance reacts with water, it produces a combustible gas B an

1.	When a substance reacts with water, it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with this solution of C, it produces the same gas B on warming but D can produces gas B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow color to a smokeless flame of Bunsen burner. A, B, C and D respectively are.....
Answer» `Na,H_2,NAOH,Zn` `K,H_2,KOH,Al` `CA,H_2,Ca(OH)_2, Sn` `CaC_2,C_2H_2, Ca(OH)_2, Fe` ANSWER :A