CBSE 12th Standard Chemistry Subject The p-Block Elements Ncert Exemplar 2 Mark Questions With Solution 2021
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CBSE 12th Standard Chemistry Subject The p-Block Elements Ncert Exemplar 2 Mark Questions With Solution 2021
12th Standard CBSE
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Reg.No. :
Chemistry
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In the ring test of NO3- ion, Fe2+ ion reduces nitrate ion to nitric oxide, which combines with Fe2+(aq) ion to form brown complex. Write the reactions involved in the formation of brown ring.
(a) -
Explain why the acidity oxoacids of chlorine increases in the order given below:
HCIO < HCIO2 < HCIO3(a) -
P4O6 reacts with water according to equation,
P4O6 + 6H2O \(\rightarrow\) 4H3PO3 . Calculate the volume of 0.1M NaOH solution required to neutralise the acid formed by dissolving 1.1g of P4O6 in H2O.(a) -
White phosphorus reacts with chlorine and the product hydrolyses in the presence of water. Calculate the mass of HCl obtained by the hydrolysis of the product formed by the reaction of 62g of white phosphorus with chlorine in the presence of water.
(a) -
Name three oxoacids of nitrogen. Write the disproportionation reaction of that oxoacid of nitrogen in which nitrogen is in +3 oxidation state.
(a)
