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
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
B.
Ca and CaH2
Ca and CaH2 will give some gaseous product on reaction with water. The reaction is as follows-
Ca + H2O → CaO + H2
CaH2 + 2H2O → Ca(OH)2 + 2H2