MCQ
Which of the following is not a buffer solution?
- ACH3COOH + CH3COONa
- BH3BO3 + Na3BO3
- CHClO4 + NaClO4
- DNH4OH + (NH4)2SO4
Explanation:
A buffer solution is a mixture of a weak acid or a weak base and its salt.
In the given question, CH3COOH and H3BO3 are weak acids whereas NH4OH is a weak base. HClO4 is a strong acid, its mixture with its salt cannot be a buffer solution according to the definition of buffer solution.
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Statement $I : C _{2} H _{5} OH$ and $AgCN$ both can generate nucleophile.
Statement $II : KCN$ and $AgCN$ both will generate nitrile nucleophile with all reaction conditions.
Choose the most appropriate option :
$SO{{_{3}^{2-}}_{\left( aq. \right)}}+{{H}_{2}}{{O}_{\left( l \right)}}\to SO{{_{4}^{2-}}_{\left( aq. \right)}}+2{{H}^{+}}_{\left( aq. \right)}+2{{H}^{+}}_{\left( aq. \right)}+2{{e}^{-}}$
If the oxidation number of metal in the salt was $+3$, what would be the new oxidation number of metal?
$X + \frac{1}{2}{O_2}\,\, \to \,\,XO + 90.8\,kJ$
It follows that the heat of reaction for the following process $M + XO$ $\rightleftharpoons$ $MO + X$ is given by......$kJ$