1
Zinc ore (zinc sulphide) is treated with sulphuric acid, leaving a sol ...
Mole Concept
2
Some bottles of colourless liquids were being labelled when the techni ...
Mole Concept
3
The mass of 3.2 × 10^5 atoms of an element is 8.0 × 10^−18 g. The atom ...
Mole Concept
4
A sample of hydrogen gas is collected and it is observed that it conta ...
Mole Concept
5
If isotopic distribution of C12 and C14 is 98.0% and 2.0%, respectivel ...
Mole Concept
6
The fractional abundance of Cl35 in a sample of chlorine containing on ...
Mole Concept
7
The shape of tobacco mosaic virus (TMV) is cylindrical, having length ...
Mole Concept
8
How many atoms do mercury vapour molecules consist of if the density o ...
Mole Concept
9
If an iodized salt contains 1% of KI and a person takes 2 g of the sal ...
Mole Concept
10
Ethanol is the substance commonly called alcohol. The density of liqui ...
Mole Concept
11
While resting, the average 70 kg human male consumes 16.628 l of oxyge ...
Mole Concept
12
A given mixture consists only of pure substance X and pure substance Y ...
Mole Concept
13
Most abundant element dissolved in sea water is chlorine at a concentr ...
Mole Concept
14
From 2 mg calcium, 1.2 × 10^19 atoms are removed. The number of g-atom ...
Mole Concept
15
At room temperature, the molar volume of hydrogen fluoride gas has a m ...
Mole Concept
16
‘n’ mol of N2 and 0.05 mol of Ar are enclosed in a vessel of capacity ...
Mole Concept
17
A gaseous mixture contains 40% H2 and 60% He, by volume. What is the t ...
Mole Concept
18
A gaseous mixture contains 70% N2 and 30% unknown gas, by volume. If t ...
Mole Concept
19
A polystyrene of formula Br3C6H2(C8H8)n was prepared by heating styren ...
Mole Concept
20
The commonly used pain reliever, aspirin, has the molecular formula C9 ...
Mole Concept
21
A quantity of 0.2 g of an organic compound containing C, H, and O, on ...
Mole Concept
22
In Dumas method, 0.2 g of an organic nitrogenous compound gave 28 ml o ...
Mole Concept
23
The empirical formula of an organic gaseous compound containing carbon ...
Mole Concept
24
An organic compound contains 40% carbon and 6.67% hydrogen by mass. Wh ...
Mole Concept
25
A compound contains elements X and Y in 1:4 mass ratio. If the atomic ...
Mole Concept
26
A compound contains equal masses of the elements A, B and C. If the at ...
Mole Concept
27
When a certain amount of octane, C8H18, is burnt completely, 7.04 g CO ...
Mole Concept
28
If rocket were fuelled with kerosene and liquid oxygen, what mass of o ...
Mole Concept
29
When 20 g Fe2O3 is reacted with 50 g of HCl, FeCl3 and H2O are formed. ...
Mole Concept
30
A quantity of 2.76 g of silver carbonate on being strongly heated yiel ...
Mole Concept
31
A mixture of N2 and H2 is caused to react in a closed container to for ...
Mole Concept
32
A power company burns approximately 500 tons of coal per day to produc ...
Mole Concept
33
An amount of 1.0 × 10^–3 moles of Ag+ and 1.0 × 10^–3 moles of CrO4^2- ...
Mole Concept
34
Hydrogen cyanide, HCN, is prepared from ammonia, air and natural gas ( ...
Mole Concept
35
What mass of carbon disulphide, CS2 can be completely oxidized to SO2 ...
Mole Concept
36
A mixture of 254 g of iodine and 142 g of chlorine is made to react co ...
Mole Concept
37
A quantity of 4.35 g of a sample of pyrolusite ore, when heated with c ...
Mole Concept
38
A 1.50 g sample of potassium bicarbonate having 80% purity is strongly ...
Mole Concept
39
One mole of a mixture of CO and CO2 requires exactly 20 g of NaOH in s ...
Mole Concept
40
When burnt in air, 14.0 g mixture of carbon and sulphur gives a mixtur ...
Mole Concept
41
When 0.03 l of a mixture of hydrogen and oxygen was exploded, 0.003 l ...
Mole Concept
42
A mixture of methane and ethylene in the ratio of a:b by volume occupi ...
Mole Concept
43
A volume of 200 ml of oxygen is added to 100 ml of a mixture containin ...
Mole Concept
44
A volume of 10 ml hydrogen requires 25 ml air for complete combustion. ...
Mole Concept
45
A volume V of a gaseous hydrocarbon was exploded with an excess of oxy ...
Mole Concept
46
The percentage by volume of C3H8 in a mixture of C3H8, CH4 and CO is 3 ...
Mole Concept
47
A volume of 10 ml chlorine gas combines with 25 ml of oxygen gas to fo ...
Mole Concept
48
How many grams of solute should be added in 100 g water to get a solut ...
Mole Concept
49
The legal limit for human exposure to CO in the workplace is 35 ppm. A ...
Mole Concept
50
The concentration of the same aqueous solution of glucose is determine ...
Mole Concept
51
D5W refers to one of the solutions used as an intravenous fluid. It is ...
Mole Concept
52
How much BaCl2 would be needed to make 250 ml of a solution having the ...
Mole Concept
53
Mole fraction of solute in an aqueous solution of NaOH is 0.1. If the ...
Mole Concept
