SATHEE: Some Basic Concepts Of Chemistry Question 153

Some Basic Concepts Of Chemistry Question 153

Question: Minimum amount of $A g_{2} C O_{3} (s)$ required to produce sufficient oxygen for the complete combustion of C, H, which produces 11.2 ltr. of $C O_{2}$ at S.T.P after combustion is: [Ag = 108] $A g_{2} C O_{3} (s) \to 2 A g (s) + C O_{2} (g) + 1 / 2 O_{2} (g)$ $C_{2} H_{2} + 5 / 2 O_{2} \to 2 C O_{2} + H_{2} O$

Options:

A) 276 g

B) 345 g

C) 690 g

D) 1380 g

Show Answer

Answer:

Correct Answer: B

Solution:

[b] $A g_{2} C O_{3} (s) \to 2 A g (s) + C O_{2} (g) + 1 / 2 O_{2} (g)$

$C_{2} H_{2} + 5 / 2 O_{2} \to 2 C O_{2} + H_{2} O$ By Stoichiometry of reaction Moles of $C O_{2}$ formed $= \frac{11.2}{22.4} = \frac{1}{2}$ Moles of $O_{2}$ required $= \frac{5}{4} \times \frac{1}{2} = \frac{5}{8}$

$∴$ Moles of $A g_{2} C O_{3}$ required $= 2 \times \frac{5}{8} = \frac{5}{4}$ Mass of $A g_{2} C O_{3}$ required $= \frac{5}{4} \times 276 = 345 g$

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Some Basic Concepts Of Chemistry Question 153

Question: Minimum amount of Ag2CO3(s) required to produce sufficient oxygen for the complete combustion of C, H, which produces 11.2 ltr. of CO2 at S.T.P after combustion is: [Ag = 108] Ag2CO3(s)→2Ag(s)+CO2(g)+1/2O2(g) C2H2+5/2O2→2CO2+H2O

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