1
IIT-JEE 1993
True or False
+1
-0
In the van der Waal's equation (P + $${{{n^2}a} \over {{V^2}}}$$)(V - nb) = nRT the constant 'a' reflects the actual volume of the gas molecules.
A
TRUE
B
FALSE
2
IIT-JEE 1993
Subjective
+4
-0
A gas bulb of 1 litre capacity contains 2.0 $$\times$$ 1021 molecules of nitrogen exerting a pressure of 7.57 $$\times$$ 103 Nm-2. Calculate the root mean square (r.m.s) speed and the temparature of the gas molecules. If the ratio of the most probable speed to the root mean square speed is 0.82, calculate the most probable speed for these molecules at this temparature.
3
IIT-JEE 1993
Fill in the Blanks
+1
-0
Ca2+ has a small ionic radius than K+ because it has ______.
4
IIT-JEE 1993
Subjective
+3
-0
Give briefly the isolation of magnesium from sea water by the Dow process. Give equations for the steps involved.
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