Stoichiometry
What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20)?

A₂B
AB₃
AB₂
A₂B₃

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Stoichiometry
A long cylinder and a sphere both of 5 cms diameter are made from the same porous material. The flat ends of cylinder are sealed. Both the cylinder and sphere are saturated with the same solution of sodium chloride. Later both the objects are immersed for a short and equal interval of time in a large tank of water which is well agitated. The fraction of salt remaining in the cylinder and the sphere are Xc and Xs respectively. Which of the following statement is correct?

Xc > Xs
Xc < Xs
Xc = Xs
Xc greater/less than Xs depending on the length of the cylinder

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Stoichiometry
In a binary liquid solution of components A and B, if component A exhibits positive deviation from Raoult's law, then component B

Exhibits positive deviation from Raoult's law
Obeys Raoult's law
Exhibits negative deviation from Raoult's law
May exhibit either positive or negative deviation from Raoult's law

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Stoichiometry
An ideal gas can be liquified, because

Its molecular size is very small
It gets solidified directly without becoming liquid
Its critical temperature is more than 0°C
Forces operative between its molecules are negligible

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