The volume of ethyl alcohol ( density 1.15 g/cc) that has to be added to prepare 100 cc of 0.5 M ethyl alcohol solution in water is
1.15 cc
2 cc
2.15 cc
2.30 cc
If the molecular wt. of Na2SO3 and I2 are M1 and M2 respectively then what will be the equivalent weight of Na2SO3 and I2 in the following reaction?
2S2O + I2 → S4O + 2I-
M1, M2
M1, M2 /2
2M1, M2
M1, 2M2
19.85 mL of 0.1 N NaOH reacts with 20 mL of HCl solution for complete neutralisation. The molarity of HCl solution is
9.9
0.99
0.099
0.0099
C.
0.099
The molality of solution containing 15.20 g of urea, (molar mass = 60) dissolved in 150 g of water is
1.689 mol kg-1
0.1689 mol kg-1
0.5922 mo kg-1
0.2533 mol kg-1
The volume of neon gas in cm3 at STP having the same number of atoms as that present in 800 mg of Ca is (At. mass : Ca = 40 g mol-1, Ne = 20 g mol-1)
448
896
224
112
A mixture of ethane and ethene occupies 41 L at 1 atm and 500 K. The mixture reacts completely with mole of O2 to produce CO2 and H2O. The mole fraction of ethane and ethene in the mixture are respectively (R = 0.082 L atm K-1 mol-1)
0.50, 0.50
0.75, 0.25
0.67, 0.33
0.25, 0.75
Which of the following pairs of substances would give same gaseous product on reaction with water?
Na and Na2O2
Ca and CaH2
Ca and CaO
Ba and BaO2