MCQ
Which buffer solution comprising of the following has its pH value greater than 7?
- ACH3COOH + CH3COONa
- BHCOOH + HCOOK
- CCH3COONH4
- DNH4OH + NH4Cl
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$L(1s^2, 2s^2 2p^4); Q(1s^2, 2s^2 2p^6, 3s^2 3p^5)$
$P(1s^2, 2s^2 2p^6, 3s^1); R(1s^2, 2s^2 2p^6, 3s^2)$
The formulae of ionic compounds that can be formed between these elements are
Codes: $ \quad P \quad Q \quad R \quad S$
[Assume steam to be an ideal gas. Given $A _{ vap } H ^{\ominus}$ for water at $373 \,K$ and $1\, bar$ is $41.1 \,kJ\, mol ^{-1} ; R =$ 8.31 $J\,K ^{-1} \,mol ^{-1}$ ]
Product $X$ is