explain why anhydrous HCl is a poor conductor while aqueous hcl is an excellent conductor
Concentrated sulphuric acid is weaker than dilute sulphuric acid even though it contains greater quantity of acid why?
You have been provided with three test tubes. One of them contains distilled water and the other two have an acidic solution and a basic solution respectively. If you are given only red litmus parer, how will you identify the cotents of each test tube?
What is 'discharge of ions'? Also, can anyone explain how elements are arranged in the electrochemical/metal activity series? Thanks.
Calculate the percentage of pure aluminum in 10kg of aluminium oxide [Al2O3] of 90% purity .[ Al=27,O=16]
A hydrocarbon contains 82.8% carbon and has a relative molecular mass of 58. Write (i) Empirical formula, (ii) its molecular formula.
Distinguish between MnO2 and CuO.
Give reasons
1)In the formation of Mgo the magnesium atom [at.on.12] loses two electrons from its valence shell.
Give reasons for the following :-
1. roasting is carried out on sulphide ores and not on carbonate ores.
2. ethanol can be converted to ethene using conc. H2SO4.
3. conc. nitric acid cannot be stored in plain glass bottles.
4. nitric acid is a strong oxidizing agent in the concentrated state of the acid than in dilute state.
ammonia is formed from the reactants nitrogen and hydrogen in the presence of a catalyst under suitable conditions. assuming all volumes are measured in litres at s.t.p. calculate the volume of ammonia formed if only 10% conversion has taken place.
why is SO3 absorbed in sulphuric acid and not in water ?
Why do gold ornaments look new even after several years of use ?
a metal oxide has the formula M2O3. It can be reduced by H2, to give free metal and water 0.1596 gm of M2O3, required 6mg of H2 for complete reduction. what is the atomic mass of the metal.
what is the mass of 56 cm3 of carbon monoxide at stp?
explain why anhydrous HCl is a poor conductor while aqueous hcl is an excellent conductor
Concentrated sulphuric acid is weaker than dilute sulphuric acid even though it contains greater quantity of acid why?
You have been provided with three test tubes. One of them contains distilled water and the other two have an acidic solution and a basic solution respectively. If you are given only red litmus parer, how will you identify the cotents of each test tube?
What is 'discharge of ions'? Also, can anyone explain how elements are arranged in the electrochemical/metal activity series? Thanks.
Calculate the percentage of pure aluminum in 10kg of aluminium oxide [Al2O3] of 90% purity .[ Al=27,O=16]
A hydrocarbon contains 82.8% carbon and has a relative molecular mass of 58. Write (i) Empirical formula, (ii) its molecular formula.
Distinguish between MnO2 and CuO.
Give reasons
1)In the formation of Mgo the magnesium atom [at.on.12] loses two electrons from its valence shell.
Give reasons for the following :-
1. roasting is carried out on sulphide ores and not on carbonate ores.
2. ethanol can be converted to ethene using conc. H2SO4.
3. conc. nitric acid cannot be stored in plain glass bottles.
4. nitric acid is a strong oxidizing agent in the concentrated state of the acid than in dilute state.
ammonia is formed from the reactants nitrogen and hydrogen in the presence of a catalyst under suitable conditions. assuming all volumes are measured in litres at s.t.p. calculate the volume of ammonia formed if only 10% conversion has taken place.
why is SO3 absorbed in sulphuric acid and not in water ?
Why do gold ornaments look new even after several years of use ?
a metal oxide has the formula M2O3. It can be reduced by H2, to give free metal and water 0.1596 gm of M2O3, required 6mg of H2 for complete reduction. what is the atomic mass of the metal.
what is the mass of 56 cm3 of carbon monoxide at stp?