Write a balanced equation for the following reaction:
Lead sulphate from lead nitrate solution and dilute sulphuric acid
Pb(NO3)2 +H2SO4 ----> PbSO4 +2HNO3
In the formation of magnesium chloride (by the direct combination of magnesium and chlorine), name the substance that is oxidised and the substance that is reduced
Write a balanced equation for the following reaction:
Copper sulphate from copper and concentrated sulphuric acid
The electronic configuration of nitrogen is 2,5 how many electrons in the outer shell of a nitrogen atom are not involved in the formation of nitrogen molecules?
Match the following:
A. Acid salt | (i) Sodium potassium carbonate |
B. Mixed salt | (ii) Alum |
C. Complex salt | (iii) Sodium carbonate |
D. Complex salt | (iv) Sodium zincate |
E. Normal salt | (v) Sodium hydrogen carbonate |
From the list given below, select the word (s) required to correctly complete blanks (i) to (v) in the following passage:
Ammonia, ammonium, carbonate, carbon dioxide, hydrogen, hydronium, hydroxide precipitate, salt, water.
A solution X turns blue litmus red, so it must contain (i)………………ions another solution Y turns red litmus blue and therefore, must contain (ii) ……….. ions. When solution X and Y are mixed together, the products will be a (iii) ……….. and (iv)……… If a piece of magnesium were put into solution X, (v)…..gas would be evolved.
(Note: words chosen from the list are to be used only once.Write the answers as (a) (i),(ii),(iii) and so on. Do not copy the passage
Write a balanced equation for the following reaction:
Lead chloride from lead nitrate solution and sodium chloride solution
Write a balanced equation for the following reaction:
Ammonium sulphate from ammonia and dilute sulphuric acid
In the formation of electrovalent compounds, electrons are transferred from one element to another. How are electrons involved in the formation of a covalent compound?