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Subject: Chemistry, asked on 31/10/10

 explain the physical significance of van der waals parameter? 

Subject: Chemistry, asked on 9/10/11

on what factors does the surface tension depends?

Subject: Chemistry, asked on 11/11/10

 Why 2nd Electron Gain Enthalpy of oxygen is positive?

Subject: Chemistry, asked on 10/9/15

100 mL of O2 gas diffuses in 10 s. 100 mL of gas 'X' diffuses in 't' sec. Gas 'X' and time 't' can be:-

a) H2, 2.5 s
b) SO2, 16 s
c) CO, 10 s
d) He, 4 s

Subject: Chemistry, asked on 6/12/13

by sucking through a straw a student can reduce the pressure in his lungs to 750mm of mercury density=13.6gm/cm3 using the straw he can drink water from a glass upto a maximum depth of

a) 10cm b) 75cm 3) 13.6cm 4)1.36cm

Subject: Chemistry, asked on 19/2/11

Explain why liquids like ether and acetone are kept in cool places?

Subject: Chemistry, asked on 1/2/15

Two gas bulbs A and B are connected by a tube having a stop cock ,Bulb A has a volume of 100 ml and contains hydrogen .After opening the gas from bulb A to the evacuated bulb B the pressure falls down to 40 percent of initial .The volume of B must be?

Subject: Chemistry, asked on 31/8/13

The drain cleaner, Drainex contains small bits of aluminium which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20C and one bar will be released when 0.15g of aluminium reacts?

Subject: Chemistry, asked on 23/9/13

DIFFERENCE BETWEEN REAL GAS AND IDEAL GAS (IN POINTS)

Subject: Chemistry, asked on 30/8/15

2g of gas A introduced in a evacuated flask at flask at 25 degree celcius. The pressure of the gas is 1atm. now 3g of another gas B is introduced in the same flasks total pressure becomes 1.5atm. The ratio of molecular mass of A and B is?

Subject: Chemistry, asked on 15/3/12

What will be the graph between log p and inverse of log v ?

Subject: Chemistry, asked on 11/7/16

The total energy of one mole of an ideal monoatomic gas at 27C is
 

Subject: Chemistry, asked on 14/8/16

Equal moles of hydrogen and oxygen gases are placed in a container with a pin hole through which both can escape what fraction of the oxygen escapes in time required for one half of the hydrogen to escape

Subject: Chemistry, asked on 14/9/15

Two flasks of equal volume connected by a narrow tube ( of negligible volume) are at 27°C and contain 0.70 mol of H2 at 0.5 atm . One of the flask is then immersed into a bath kept at 127°C ,while the other remains at 27°C . Calculate the final pressure and the number of moles of H2 in each flask.

Subject: Chemistry, asked on 8/11/12

prove that PV=1/3 mNc2

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