Hydrogen And Its Compounds Question 242
Question: When a substance Areacts 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 also produces the same gas B on warming but D can produce gas B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour to a smokeless flame of Bunsen burner. A, B, C and D respectively are
Options:
A) $ Na,H_2,NaOH,Zn $
B) $ K,H_2,KOH,Al $
C) $ Ca,H_2,Ca{{( OH )}_2},Sn $
D) $ CaC_2,C_2H_2,Ca{{(OH)}_2},Fe $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] $ \underset{‘A’}{\mathop{2Na}}+2H_2O~\to \underset{‘C’}{\mathop{2NaOH}}+\underset{‘B’}{\mathop{H_2}}\uparrow $
$ \underset{‘D’}{\mathop{Zn}}+\underset{‘C’}{\mathop{2NaOH}}\to Na_2ZnO_2+\underset{‘B’}{\mathop{H_2}}\uparrow $
$ \underset{‘D’}{\mathop{Zn}}+dil.H_2SO_4\to ZnSO_4+\underset{‘B’}{\mathop{H_2}}\uparrow $ Na produces golden yellow colour with smokeless flame of Bunsen burner.
BETA
