Physics, asked by mehakcheema13, 1 year ago

state whether the hydrogen gas is liberated or not in the four reactions listed below: a. reaction of Zinc with potassium Hydroxide b. reaction of phosphorus with concentrated sulphuric acid c. reaction of iron with hydrochloric acid d. reaction of copper with nitric acid ques 2 how is evolution of hydrogen gas in a given reaction detected​

Answers

Answered by presto
10

Answer:

1.a) Zn + KOH --> K2ZnO2 + H2  =>YES

b) P + H2SO4 --> H3PO4 + SO2 + H2O  =>NO

c) Fe + 2HCl --> FeCl2 + H2  =>YES

d) Cu + HNO3 --> Cu(NO3)2 +NO2 + H2O => YES

2. Hydrogen can be detected by testing a burning splinter near the mouth of the test tube, it goes out with a pop sound. This indicates the presence of hydrogen.

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Answered by ypandey2222
7

Answer:

a)YES

b)NO

c)YES

d)NO

You can test it by bringing a burning matchstick near it.....You will hear a pop sound.

Explanation:

a)Zn + 2KOH ====> K2ZnO2 + H2

b)P4+10H2SO4 ====>4H3PO4+10SO2+4H2O

c)Fe (s) + 2HCl (aq) ====> FeCl2(aq) + H2 (g)

D)4 HNO3(l) + Cu(s) ====> Cu(NO3)2(s and aq) + 2 NO2(g) + 2 H2O(l)

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