AIEEE Exam

The vapour pressures of the two liquids ‘P’ and
‘Q’ are 80 and 60 torr respectively. The total
vapour pressure of the solution obtained by
mixing 3 moles of P and 2 moles of Q would be
(A) 68 torr (B) 140 torr
(C) 72 torr (D) 20 torr

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AIEEE Other Question

How many unit cells are present in a cube-shaped
ideal crystal of NaCl of mass 1.00 g ?
[Atomic mass : Na = 23, Cl = 35.5]
t
1/4 can be taken as the time taken for the
concentration of a reactant to drop to 3/4 of its
initial value. If the rate constant for a first order
reaction is K, then t1/4 can be written as –
(A) 0.10 /K (B) 0.29 /K
(C) 0.69/K (D) 0.75 /K