https://padlet.com/subhoshree15/P49C Part-4 en-us 2021-01-19 03:20:42 UTC 2025-11-17 22:41:57 UTC hello@padlet.com https://padlet.com/subhoshree15/P49C/wish/1099538406 Example: Mg+H2SO4 = MgSO4+H2
             Zn+HCL = ZnCl2+ H2
general eq. :- 1) metal+ dil.acid = metal sulphate+hydrogen
2) metal+ HCL = metal chloride+ hydrogen 
) metal+ H2SO4 = metal Sulphate+ hydrogen ]]> 2021-01-19 03:54:59 UTC https://padlet.com/subhoshree15/P49C/wish/1099538406 sarveshlegend999 https://padlet.com/subhoshree15/P49C/wish/1099539252 H2SO4+MgS -> H2S+ MgSO4

Gas released has rotten eggs smell.
The gas turns blue litmus paper red. It produces dense white fumes when it reacts with Nh3(ammonia)
 
General equation : H2SO4 + Metal Sulphate -> H2S+Metal Suphate 


]]> 2021-01-19 03:55:42 UTC https://padlet.com/subhoshree15/P49C/wish/1099539252 https://padlet.com/subhoshree15/P49C/wish/1099539836 Na2So3+H2So4-----> Na2So4+ H2O+ So2
Ka2So3+H2So4-----> Na2So4+ H2O+ So2
The Gas evolved turns lime water milky and the milkiness disappears when it is passed in excess. It also decolorizes pink acidified potassium chromate solution. The gas has a suffocating smell of burnt sulfur.


]]> 2021-01-19 03:56:10 UTC https://padlet.com/subhoshree15/P49C/wish/1099539836 https://padlet.com/subhoshree15/P49C/wish/1099556098 Metals above hydrogen displace hydrogen from water and dil.acid, but metals below hydrogen do not.]]> 2021-01-19 04:08:33 UTC https://padlet.com/subhoshree15/P49C/wish/1099556098 https://padlet.com/subhoshree15/P49C/wish/1099565577 q2)
a-NO2
b-SO2
c-O2]]> 2021-01-19 04:15:13 UTC https://padlet.com/subhoshree15/P49C/wish/1099565577 https://padlet.com/subhoshree15/P49C/wish/1099567622 Q1) a-Sulphur dioxide
     b-  SO2 + K2Cr2O7 + 3H2SO4  —> K2SO4 + Cr2(SO4)3 + 3H2O 
Sulfur dioxide react with potassium dichromate and sulfuric acid to produce potassium sulfate, chromium(III) sulfate and water and  the solution turns from orange to green.]]> 2021-01-19 04:16:35 UTC https://padlet.com/subhoshree15/P49C/wish/1099567622 https://padlet.com/subhoshree15/P49C/wish/1099569011 Q3
1. H2S. A black precipitate is formed
2. hydrogen + sulphur]]> 2021-01-19 04:17:33 UTC https://padlet.com/subhoshree15/P49C/wish/1099569011 sarveshlegend999 https://padlet.com/subhoshree15/P49C/wish/1099571098 4
i) It is an acid 
ii) Water
iii) CO2
iv) As SO2 cannot extinguish glowing splinter 
v) CuSO4.5H2O(blue) as when it is heated it turns white, to anhydrous copper sulphate  
vi) Water
It is neutral to litmus. It can anhydrous copper sulphate(white) to blue ]]> 2021-01-19 04:19:08 UTC https://padlet.com/subhoshree15/P49C/wish/1099571098 https://padlet.com/subhoshree15/P49C/wish/1099576682 vii)The substance is iodine. On continuous heating its is observed that the violet sublimate on the bottom of the test tube sublimates and settles on the glass of the test tube.We can infer that on heating, the solid changes to gas directly without turning into a liquid'
viii)The residue formed in E is reddish brown when hot and yellow when cold and stains the test tube with yellow on cooling.
ix)The gas is nitrogen dioxide. It changes moist blue litmus red and turns potassium iodide paper brown
x).A: Na2CO3.10H2O
B: Copper Nitrate: Cu(No3)2 
C: copper Sulfate
D) Iodine 
E) Lead Nitrate
Reactions:
A: Na2CO3.10H2O----> Na2Co3+ 10 H2o
B:  2Cu(No3)2----> 2CuO +4NO2+ O2
C: copper Sulfate---->CuSo4+5H2o
D
I2----> 2I
E
2Pb(No3)2---> 2PbO +4No2+ O2
xii) a) thermal decompostion:
E,A,B,C,D
b) thermal dissociation:
C, A

]]> 2021-01-19 04:22:47 UTC https://padlet.com/subhoshree15/P49C/wish/1099576682 sarveshlegend999 https://padlet.com/subhoshree15/P49C/wish/1100334924 metal carbonate /Bircarbonate+dil.acid=salt+water+CO2
1)
Na2CO3+H2SO4=Na2SO4+H2O+CO2
- A colourless, odourless,acidic gas evovled, turns blue litmus red, brisk effervescence. Passing gas through lime water turn it milky.
2)
2NaHCO3+H2SO4=Na2SO4+2H2O+CO2
-colourless,odourless,acidic gas evovled, turns blue litmus red,Brisk effervescence, on passing the gas through lime water, it turns milky.]]> 2021-01-19 09:22:01 UTC https://padlet.com/subhoshree15/P49C/wish/1100334924