Chemistry - Ideal Gas Question with Solution | TestHub
Each pair of gases in Column I is mixed at the same temperature and pressure and any possible reaction goes to completion. Match each case with the statements in Column II that are true for the gas left over (volumes measured at the same and ) (a Column I entry may match more than one Column II entry):
Column I (Gases mixed) | Column II (Gas left over) |
|---|---|
() 30 mL + 20 mL , sparked (water condenses) | (1) a single gas is left |
(Q) 20 mL + 60 mL , forming | (2) the volume of gas decreases |
() 20 mL + 20 mL , sparked | (3) a reactant is left over |
(S) 40 mL + 20 mL , forming solid | (4) volume of gas left = 20 mL |
| (5) a product gas is present in the gas left |
Choose the option with the correct matching:
Options:
Answer:
Solution:
() 30 mL needs 15 mL . Left: 5 mL . Single gas, volume falls from 50 to 5, reactant left: 1, 2, 3.
(Q) + gives : 20 mL and 60 mL give 40 mL . Single gas, volume falls from 80 to 40, product present: 1, 2, 5.
() 20 mL needs 10 mL and gives 20 mL . Left: 10 mL + 20 mL = 30 mL. Two gases, volume falls from 40 to 30, reactant left, product present: 2, 3, 5.
(S) + gives solid. 20 mL uses 20 mL . Left: 20 mL . Single gas, volume falls from 60 to 20, reactant left, volume = 20 mL: 1, 2, 3, 4.
Correct matching: to 1,2,3; Q to 1,2,5; to 2,3,5; S to 1,2,3,4. Answer: (B).
