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Question

The formula of exhausted permutit is_________.
  1. CaAl2Si2O8.xH2O
  2. CaB2Si2O8.xH2O
  3. NaAl2Si2O8.xH2O
  4. K2Al2Si2O8.xH2O

A
NaAl2Si2O8.xH2O
B
CaAl2Si2O8.xH2O
C
CaB2Si2O8.xH2O
D
K2Al2Si2O8.xH2O
Solution
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Hydrated sodium aluminium silicate (Na2Al2Si2O8.xH2O) is called permutit. These complex salts are also known as zeolites.

Exhausted permutit means, the impurity in water (Ca) that is replaced by Na, which becomes (Ca2Al2Si2O8.xH2O).

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Similar Questions
Q1

The correct formula of exhausted permuitit is :

(p) Na2Al2Si2O8.xH2O

(q) K2Al2Si2O8.xH2O

(r) MgAl2Si2O8.xH2O

(s) CaAl2Si2O8.xH2O


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Q2
In the following sets of reactants which two sets exhibit the amphoteric character of Al2O3.xH2O?

Set 1 : Al2O3.xH2O (s) and OH(aq)
Set 2 : Al2O3.xH2O (s) and H2O(l)
Set 3 : Al2O3.xH2O (s) and H+(aq)
Set 4 : Al2O3.xH2O (s) and NH3(aq)

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Q3
500mL of 2MHCl.100mL of 2MH2SO4 and one g equivalent of a monoacidic alkali are mixed together. 30mL of this solution required 20mL of Na2CO3.xH2O solution obtained by dissolving 143gNa2CO3.xH2O in one litre solution. Calculate water of crystallisation of Na2CO3.xH2O.
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Q4
Na2SO4.xH2O has 50% H2O. Hence, x is :
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Q5
What is the value of X in the given chemical formula of crystalline borax, Na2[B4O5(OH)4].XH2O?
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