Question

At the top of a mountain a thermometer reads 7°C and barometer reads 10 cm of Hg. AT the foot of mountain they lead 27°C and
76 cm of Hg respectively. The ratio of the density of air at the top to that at the bottom of the mountain is
(A) 0.885
(B) 0.987
(C) 0.75
(D) 1.0​

Answer 1

i tkink option c)0.75 option

Answer 2

HI

ANSWER IS OPT=B

EXPLANATION

As we know,

PV=

M

w

RT

∴d=

V

w

=

RT

PM

d

2

d

1

=

R×280×76×M

70×M×R×300

=0.987