How much time (in hours) would it take to distribute one Avogadro number of wheat grains, if 1020 grains are distributed each second?
0.1673
1.673
16.73
167.3
B.
1.673
If 1020 grains are distributed in 1 s, 6.023 x 1023 grains will be distributed in
At 25°C, at 5% aqueous solution of glucose (molecular weight = 180g mol-1) is isotonic with a 2% aqueous solution containing and unknown solute. What is the molecular weight of the unknown solute?
60
80
72
63
200 mL of water is added to a 500 mL of 0.2 M solution. What is the molarity of this diluted solution?
0.5010M
0.2897M
0.7093
0.1428
When 200 mL of aqueous solution of HCl (pH = 2) is mixed with 300 mL of an aqueous solution of NaOH (pH = 12) the pH of the resulting mixture is
10
2.7
4.0
11.3
The percentage of an element M is 53 in its oxide of molecular formula M2O3. Its atomic mass is about
45
9
27
36
The pH of a solution obtained by mixing 50 mL of 1 N HCl and 30 mL of 1 N NaOH is [log 2.5 = 0.3979]
12.042
0.6021
0.3979
3.979
How much of sulphur is present in an organic compound, if 0.53 g of the compound gave 1.158 g of BaSO4 on analysis ?
10%
20%
30%
15%
Law of multiple proportions is illustrated by one of the following pairs :
N2O and NO
H2S and SO2
NH3 and Na2O
BeO and BeCl2
Avogadro's hypothesis states that :
the ideal gas consists of a large number of small particles called molecules
under the same conditions of temperature and pressure equal volumes of gases contain the same number of molecules
volume of a definite quantity of gas at constant pressure is directly proportional to absolute temperature
a given mass of gas at constant pressure is directly proportional to absolute temperature
If 117 gm NaCl is dissolved in 1000 g of water the concentration of the solution is said to be :
2 molar
2 molal
1 normal
1 molal