Question
Chemistry Question on Polymers
When a substance A reacts with H2O, it produces a combustible gas B and solution of C in water. When another substance D reacts with this solution of C, it produces the same gas B on warming. But D can produce the same gas B on reaction with dil. H2SO4 at room temperature. A imparts golden yellow colour to Bunsen flame. A, B, C and D respectively are
A
(A) CaC2, C2H2, Ca(OH)2 and Fe
B
(B) Ca, H2, Ca (OH)2 and Sn
C
(C) K, H2, KOH and Al
D
(D) Na, H2, NaOH and Zn
Answer
(D) Na, H2, NaOH and Zn
Explanation
Solution
Explanation:
2Na+2H2O→H2+2NaOH(A) (B) (C)Zn+2NaOH⟶ANa2ZnO2+H2(D)Zn+H2SO4→ZnSO4+H2(Impure)