Q1
What happens when water is added in quick lime
Write chemical eqn
Q2
What is the colour of crystal of ferrous sulphate and copper sulphate
Write their chemical formula
Q3.
What happens when ferrous sulphate is heated strongly
Write chemical eqn
Q4.
What happens when lead nitrate is heated. Write chemical eqn
Q5.
Why do we add sulphuric acid in water during electrolysis of it
Q6.
What happens when electricity is passed through it
What is volume ratio of hydrogen and oxygen gas evolved during electrolysis of it
Write balance chemical eqn
pl answer fast
Answers
What happens when water is added in quick lime Write chemical equation❓
AnswerThe chemical formula of quick lime is CaO . ... The reaction which takes place when quicklime is added to water is as follows: CaO+H2O→Ca(OH)2 . From the above reaction we can say that, when quick lime is added to water then, formation of slaked lime precipitate takes place.
What is the colour of crystal of ferrous sulphate and copper sulphate Write their chemical formula❓
AnswerThe color of ferrous sulphate crystals is green. Ferrous sulphate crystals contain water molecules (FeSO4. 7H2O). On heating, ferrous sulphate crystals lose water and anhydrous ferrous sulphate (FeSO4) is formed.
What happens when ferrous sulphate is heated strongly Write chemical eqn❓
AnswerFerrus sulphate(FeSO4) is blue green colour. On being heated is losses water and converted to anhydrous ferrous sulphate. now if we further heated then it will be decomposed to ferric oxide ,sulphar dioxide, sulphar trioxide . It is a decomposition reaction.
What happens when lead nitrate is heated. Write chemical eqn❓
AnswerWhen lead(II) nitrate is heated, it decomposes into lead (II) oxide, nitrogen dioxide and oxygen. The balanced chemical equation for this reaction is 2 Pb(NO3)2 (s) produces 2 PbO (s) + 4NO2 + O2 (g). 2Pb(NO3)2 = 2PbO + 4NO2 + O2.
Why do we add sulphuric acid in water during electrolysis of it❓
AnswerTo increase the conductivity of water a few drops of sulphuric acid is added . Being a strong acid it can ionize completely to release H+ ions. These H+ ions are responsible for the conduction of electricity. To carry out electrolysis in water,a few drops of sulphuric acid is added to the water.
What happens when electricity is passed through it❓
Answer when electric current passed through brine, hydrogen gas is evolved at the anode, chlorine gas is evolved at the cathode, and sodium hydroxide is formed in the electrolysing solution. These three co-products are all very useful chemicals.
What is volume ratio of hydrogen and oxygen gas evolved during electrolysis of it
What is volume ratio of hydrogen and oxygen gas evolved during electrolysis of itWrite balance chemical eqn❓
AnswerThe water decomposes during electrolysis to form hydrogen and oxygen gases in the ratio 2:1 by volume.
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