0.6 mol of barium chloride in solution is mixed with 0.2 mol of sodium phosphate the amount of barium phosphate produced is
12 g of Mg (at. Mass 24) react with dilute mineral acid to produce maximum hydrogen equal to
142 g of chlorine represents
1.Two g-molecules of chlorine
2.4 moles of chlorine atoms
3.Two moles of Cl atoms
4.Both a b.
27 g of Al will completely react with.
1.3 mol of oxygen
2.3 g-atoms of oxygen
3.3 g-equivalents of oxygen
4.3 atoms of oxygen
1.8 g of oxygen
2.24 g of oxygen
3.16 g of oxygen
4.48 g of oxygen.
33.6 L of water vapour at S.T.P. are condensed to liquid state. The volume occupied by it is approximately.
50 ml of samples of distilled water ordinary tap water and boiled tap water requires 2 ml 26 and 10 of soap solution respectively to form permanent lather. The ratio of permanent hardness to temporary hardness in tap water is
A certain gaseous mixture contains methane and sulphur dioxide in ratio of 1: 8 by mass. The ration of the number of molecules is
Among the pairs of compounds given below which pair contains compounds with different percentage of carbon?.
1.propene and propane
2.butane and isobutene
3.acetylene and benzene
During synthesis of ammonia from its constituent elements the volume of the product relative to the total volume of thereacting species is.
If atomic mass of oxygen were taken as 100 the molecular mass of water would be Approximately
If given sample of potassium chlorate is 80% pure then 48 g of oxygen would be produced from
1.98.0 g of the sample
2.153.12 g of sample
3.245 g of sample
4.122.5 g of sample.
On dividing 0.86 by 16.564 the actual answer is 0.0519198. The correctly reported answer will be
1.39.4% of its mass
2.49.3% of its mass
3.46.5% of its mass
4.43.9% of its mass.
Sodium carbonate crystals lose water molecules on exposure to atmosphere. The related property is called.
1.Law of combining volumes
2.Law of multiple proportions
3.Law of conservation of mass
4.Law of definite proportion
The compound AB contains elements A and B in the ratio of 1:35.5 by mass. The mass of B that will be required to react with 2 g of A is
The compounds with identical crystal structures and analogouschemical formulae are calledallotropes.
The conversion of oxygen to ozone occurs to the extent of 15% only. The mass of ozone that can be prepared from 67.2 L of oxygen at N.T.P. will be
The correctly reported difference of 18.3426 and 8.06 willhave significant figures equal to
The mole fraction of water in a solution containing 117 g sodium chloride and 900 g of water is
The number of atoms is largest in
1.71 g of chlorine
2.48 g of magnesium
3.127 g of iodine
4.4 g of hydrogen.
The number of moles of lead nitrate which are required to be decomposed to produce 48 of Oxygen
The number of moles of oxygen in one litre of air (21% oxygen by volume) at S.T.P. would be
The percentage of hydrogen in water and hydrogen peroxide is11.1 and 5.9% respectively. These figures illustrate
1.Law of multiple proportions
2.Law of conservation of mass
3.Law of reciprocal proportions
4.Law of combining volumes.
Vapour density of a metal chloride is 77. The equivalent mass is 3. Its atomic mass would be
When 4.0 g of iron is burnt at high temperature to ferric oxide at constant pressure 29.28 kJ Of heat is evolved. The amount of heat evolved for producing one mole of ferric oxide is
1.2 2-Dimathylpropanoic acid
1.No change in mass is observed when 2.0 g of Mg is heated in vacuum
2.1.2 g of carbon when burnt in excess if oxygen consumes only 3.2 g of it to form 4.4 g of carbon dioxide
3.12 g of carbon when heated in limited supply of air produces only 20 g of carbon monoxide
4.A sample of air in heating does not show any change in mass but volume increases.
1.1 g of oxygen and 1 gm-atom of hydrogen
2.1 g of oxygen and 1 gm of ozone
3.1 g of hydrogen and 1 gm-atom of hydrogen
4.4 g of calcium and 0.1 gm-atom of calcium.
1.Mixing of 10 g of sulphur and 2 g of sand does not show a change in mass
2.The mass of platinum wire before and after heating remains constant
3.2.2 g of propane and 8 g of oxygen produces 10.2 g of gaseous mixture
4.2.8 g of CO and 1.6 g of oxygen gave only 2.24 L of CO2 at S.T.P.
Which one of the following solution of sulphuric acid will exactly neutralize 25 ml of 0.2 M NaOH solution?
1.12.5 ml of 0.1 M solution
2.25 ml of 0.2 M solution
3.25 ml of 0.1 M solution
4.50 ml of 0.2 M solution.