4. The volume of a given mass of air is doubled in
adiabatic expansion. If the initial pressure of the air
is 80 cm of mercury, what will be the final pressure ?
for air = 1.41 and (2)1.41 = 2.66 Ans. 30 cm of Hg.
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Read the paragraph given below
and fill in the blanks by choosing
the most appropriate option from
the given ones
In one of his stories, Tolstoy
narrates how neighbours (a)
behave. A child was wearing
a new shirt and the neighbour's
child (b) ............ mud on it and (c)
Spoiled it. Womenfolk
started the quarrel and the men folk
entered into the fray, ending in a
few bruises. By then the children (d
their entire quarrel and were
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