Questions
The pairs of compounds which cannot exist together in aqueous solution are
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a
NaH2PO4 and Na2HPO4
b
Na2CO3 and NaHCO3
c
NaOH and NaH2PO4
d
NaHCO3 and NaOH
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Correct option is C
NaOH is a strong base whereas NaH2PO4 is a salt of strong base (NaOH) and H3PO4 (weak acid). Hence, NaOH and NaH2PO4 do not exist together in aqueous solution. NaOH is a strong base, whereas NaHCO3 is a salt of strong base (NaOH) and weak acid (H2CO3). Hence NaOH and Na2CO3 . Hence NaOH and Na2CO3 do not exist together.Similar Questions
A weak monobasic acid is 0.01% ionised, its concentration is 1 M. Hence, [OH-] is
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