A open ended mercury manometer is used to measure the pressure exerted by a trapped gas as shown in the figure. Initially manometer shows no difference in mercury level in both columns as shown in diagram.
After sparking 'A' dissociates according to following reaction
`2A(g)rarr 3B(g)+2C(g)`
If pressure of Gas "A" dissociates to 0.8 atm, then (Assume temperature to be constant and is 300 K)

Options

A. total pressure increases to 1.3 atm
B. total pressure increases by 0.3 atm
C. total pressure increases by 22.3 cm of Hg
D. difference in mercurry level is 228 mm.

Answer

a,b,d

Explanation

(a,b,d) `P_(T)=(1+3xx)=1+3xx0.1=1.3 atm.`
`/_\P=0.2atm or 76xx0.3cm" of "Hg`
`or 760xx0.3 mm " of " Hg`