A mixture contains 9 gram each of H2O and NaCl, what is the mole fraction of NaCl?
1.0.15
2.0.23
3.0.45
4.0.64
If the mole fraction of 4.5 moles of solute is 0.5, what is the number of moles of solvent?
1. 9
2.4.5
3.1.5
4.3
If the mole fraction of SO2 in H2SO4 is 0.2, what is the ratio of mass of sulfur and oxygen in the solution?
1.0.166
2.6
3.1.8
4.0.555
What is the mass of a liquid having density 20 kg/m3, enclosed in a sphere of radius 1 m?
1.80.7 kg
2.83.7 kg
3.85.7 kg
4.88.7 kg
A compound contain 12% of carbon, 16% of oxygen, 28% of nitrogen, 4% of hydrogen and 40% calcium by weight, then what can be the possible formula of the compound?
1.C2H3N2Ca(OH)
2. CH4N4Ca2(OH)
3.CH3N2Ca2(OH)
4.None of the mentioned
A compound contains 40% of Sulphur and 60% of Oxygen, what is the empirical formula of the compound?
1.SO2
2.SO3
3. SO4
4.None of the mentioned
A cylinder completely filled with water has density = 10 kg/m3 and volume 5 m3 , now a cube with side 1 m and density 25 kg/m3 is dipped into the cylinder with some water dropping out, what is the final density of cylinder?(neglect the mass of cylinder)
1.13 kg/m3
2.15 kg/m3
3. 17 kg/m3
4.19 kg/m3
A gaseous mixture composed of 20% CH4, 30% C2H4, 35% C2H2, and 15% C2H2O. What is the average molecular weight of the mixture?
1.20
2.25
3. 6.75
4. 9.25
A gaseous mixture is composed of 20% CO2, 40% O2 and 40% N2. What is the mass fraction of N2?
1. 0.307
2.0.416
3.0.529
4.0.784
A liquid mixture composed of 20% CH4, 30% C2H4, 35% C2H2, and 15% C2H2O. What is the average molecular weight of the mixture?
1.20
2.25
3.6.75
4.9.25
A liquid mixture of O2, CH4 and CO has the composition 32% O2, 16% CH4 and 52% CO, then what is the mole fraction of CH4?
1.0.1
2.0.2
3.0.25
4.0.5
A liquid of mass 10 kg is enclosed in a cylinder of radius 1 m and length 5 m, what is the density of liquid?
1.0.54 kg/m3
2. 0.44 kg/m3
3. 0.63 kg/m3
4.0.83 kg/m3
A mixture contains 10 grams each of CH4, H2O, and SO2, what is the mole fraction of CH4?
1.0.14
2.0.31
3.0.46
4.0.67
A mixture contains 10% CO, 40% CO2 and 50% H2O, what is the mass percent of CO2?
1.9.5
2.15.4
3. 39.5
4.74.1
A mixture contains 20% CO2, 30% SO2 and 50% H2O, what is the mass percent of CO2?
1.23
2.45
3.66
4.87
A mixture contains 20% NaCl, 30% CH4 and 50% H2O, what is the mass percent of NaCl?
1. 21
2.34
3.45
4.68
A mixture contains 23 g of ethanol and 36 g of water, some acetic acid is added to the mixture and its mole fraction becomes 0.5, how much acetic acid was added?
1.25 g
2.75 g
3.100 g
4.150 g
A mixture contains 80% of HCl and 20% H2O by weight, what is the mole fraction of HCl?
1.0.15
2.0.29
3.0.45
4.0.66
A mixture contains 80% of NaOH and 20% H2O by weight, what is the mole fraction of NaOH?
1.0.24
2.0.42
3.0.64
4.0.78
A mixture of gases SO2, O2 and 4 g of N2 and total mass of mixture is 10 g, what is the sum of mole fraction of SO2 and O2?
1.0.25
2.0.5
3. 0.75
4.1
A neutral gas that is made of nitrogen and hydrogen only contains 7 g of nitrogen is in a mixture of with total mass 17 g, what is the mass fraction of the gas?
1.0.5
2. 0.25
3.0.45
4.0.8
A solid of density d is dropped in a liquid of density D, if d>D then,
1.Solid will completely sink
2.Solid will completely float
3.Solid will partially sink
4.None of the mentioned
A solution has 25% w/w solution of Sodium Chloride in 10 grams of water what is the mole fraction of Sodium Chloride?
1.0.05
2. 0.06
3.0.07
4.0.08
An empty vessel has with mass 5 kg with volume 0.1 m3, is now completely filled with a liquid of density 100 kg/m3, what is the final density of the cylinder?
1.50 kg/m3
2. 100 kg/m3
3.150 kg/m3
4.200 kg/m3
Calculate the number of moles in 369 grams of CaOCl2?
1. 1
2. 2
3.3
4. 4
Calculate the number of moles in 42 grams of NaHCO3?
1. 0.5
2. 1
3. 1.5
4. 2
How many atoms of carbon represent 1.5 mole?
1.6.022 X 1023
2.1.2044 X 1023
3.3.011 X 1023
4.9.033 X 1023
How many grams of NaCl represent 1 mole?
1.23
2.35.5
3.58.5
4.69.5
If a compound contains 48% of Carbon, 48% of oxygen and 8% of hydrogen by weight, then what is the possible molecular formula of the compound?
1.C2H4O
2.CH4O3
3.C4H4O3
4.C4H8O3
If hydrogen is 14% by weight in CH3(OH)x(NH3)y, then what is the possible value of x*y?
1.6
2.12
3.18
4.24
If the mole fraction of sodium is 0.25 in 9 moles of liquid carbon dioxide, what is the mass fraction of sodium?
1.0.10
2.0.15
3.0.20
4. 0.25
The mole percent of CO2 and H2O in a mixture is 40% and 60% respectively, what is the mass percent of CO2?
1.24.1
2.47.2
3.61.9
4.78.5
The mole percent of H2 and N2 in a mixture is 50% each, what is the mass percentage of H2?
1.12.5
2. 25
3. 50
4.87.5
What are the number of atoms of chlorine in 250.5 grams of Cl2O6?
1.1.806 X 1024
2.2.408 X 1024
3.9.033 X 1023
4.6.022 X 1023
What are the number of molecules of water in CuSO4•5H2O, if the weight of oxygen in it is 36 grams?
1.3.25 X 1023
2.5.25 X 1023
3.7.52 X 1023
4.9.52 X 1023
What are the number of moles of Hydrogen in 158 grams of Ammonium Bicarbonate?
1.5
2.10
3.15
4.20
What are the number of moles of hydrogen in NH4[Cr(SCN)4(NH3)2] if the weight of nitrogen in it is 49 grams?
1.3.5
2.5
3.7
4.10
What are the number of moles of nitrogen in 274 grams of (NH4)2Ce(NO3)6?
1.16
2. 8
3. 6
4.4
What is the density of a liquid of mass 10 kg and contained in a cylinder of radius 5 m and surface area (excluding top and bottom) of 10π m2?
1. 0.2π kg/m3
2.0.4π kg/m3
3.0.5π kg/m3
4.0.6π kg/m3
What is the density of a liquid of mass 20 kg, enclosed in a cuboid of surface areas of three sides as 1 m2, 2 m2, 5 m2, and one of its sides is 2 m?
1.1 kg/m3
2. 2 kg/m3
3.3 kg/m3
4. 4 kg/m3
What is the density of a substance of mass 10 grams and volume 5 liters?
1.2 kg/m3
2.20 kg/m3
3.200 kg/m3
4.2000 kg/m3
What is the mass fraction of 4 moles of Sodium in 8 moles of Hydrogen chloride?
1.0.24
2. 0.48
3. 0.56
4.0.72
What is the mass of a cube having surface area 24 m2, and density 1 kg/m3?
1.1 kg
2. 2 kg
3.4 kg
4.8 kg
What is the mole fraction of sodium with moles n in a solution with moles of solvent N?
1. N/n
2. n/N
3.n/(n + N)
4.N/(n + N)
What is the molecular weight of a mixture that contains 25% CO2, 40% O2 and 35% N2?
1.11.2 g
2.22.4 g
3.33.6 g
4.44.8 g
What is the specific gravity of a substance with density 100 kg/m3 with respect to reference substance of density 100 lb/m3?
1.1.1
2. 2.2
3.3.3
4.4.4
What is the unit of mole fraction?
1.Kg/m3
2. N/m3
3.m-2
4.None of the mentioned
What is the value of x in C2H8(OH)x if the percentage by weight of hydrogen is 12%?
1.1
2.2
3.3
4.4
What is the weight of 10 moles of a mixture with composition 15% O2, 25% SO2, 30% COCl2, 25% SO3 and 5% N2?
1.124
2.345
3.507
4.719
Which of the following is not a unit of density?
1.Kg/m3
2.N/m3
3.N.s2/m4
4. g/cm3