Question

Four students A, B, C and D were asked by their teacher to arrange the set-ups I to IV as given below and identify the gas, if any, evolved in each case After observation, the students arrived at the inferences recorded in the following table Students
I
I
III
IV
A
B
C
D
Hydrogen
Carbon dioxide
Carbon dioxide
No gas
No gas
Hydrogen Hydrogen
Carbon dioxide
Carbon dioxide
No gas Hydrogen
Carbon dioxide
Hydrogen
Carbon dioxide
No gas
Hydrogen
The correct observations and inferences have been reported by the student (1) A
(2) B
(3) C
(4) D

Answer 1

Answer:

option B is answer of the question

Answer 2

The observation made by student C is correct. The solution I is carbon dioxide. Solution II is hydrogen. Solution III is hydrogen and solution IV is No gas. Explanation:  

•  In the first setup, sodium carbonate reacts with dilute HCl to give sodium chloride and carbon dioxide.               
• Na2CO3 + 2HCl ⇋ NaCl + Co2 + H2O.
• In the second set up, zinc reacts with sodium hydroxide to give hydrogen gas and zinc chloride.                          
•  NaOH + Zn  Na2ZnO2 + H2
• In the third set up, when zinc reacts with dilute HCl, it gives hydrogen gas and zinc chloride.                            
• Zn + HCl  ZnCl2 + H2
• In the fourth setup, there will be no reaction when sodium hydroxide reacts with sodium carbonate.
• So, the inferences made by student C are correct.  

You can get all the answers of Chapter 6 in the link below:

https://brainly.in/question/15022299

Few questions related to this chapter:

On adding a few drops of universal indicator solution to three unknown colo.....

brainly.in/question/14917579

When dilute hydro-chloric acid is added to granulated zinc placed in a test.....

brainly.in/question/14916764