TG EAMCET 3 May 2025 Shift 1 Paper

Step 1: Calculate moles of each gas
nO2=‌

64

32

=2‌ moles ‌
nN2=‌

28

28

=1‌ mole ‌
nCO2=‌

132

44

=3‌ moles ‌
Step 2: Add up all the moles for the total initial amount
ni‌=nO2+nN2+nCO2
‌=2+1+3=6‌ moles ‌
Step 3: Find out how many moles are left after removing all the oxygen gas
Only nitrogen ( N2 ) and carbon dioxide ( CO2 ) are left.
nf=nN2+nCO2=1+3=4‌ moles ‌
Step 4: Relate pressure and moles using the formula pV=nRT
Since temperature and volume stay the same, the pressure is directly proportional to the number of moles. So, ‌

pi

pf

=‌

ni

nf

The starting pressure is p, so
‌

p

pf

=‌

6

4

So, the final pressure is pf=‌

2

3

p