Fill in the blank by choosing the appropriate word/words from those given in the brackets.
(acetaldehyde, formaldehyde, benzaldehyde, yellow, white, violet, Cannizzaro's, Liebermann, no `alpha`-hydrogen atom, `1alpha`-hydrogen atom, `2alpha`-hydrogen atoms, aldol, `beta`-hydroxy aldehyde, aldol condensation, mixed condensation, + I,-I, -M,+ M. decreases, increases, benzalchloride, PCI, SOCh. sec, alcohol, tert, alcohol, phenylhydrozone, semicarbazone, more, less, acetals, ketals, silver mirror, test, urotropine, acetaldehyde cyanohydrin, lactic acid, benzoic acid, Sodalime, ethanoic acid, propanoic acid, electrolysis, Kolbe's electrolytic reaction, carbon dioxide, water, amides, alpha, halogen, phosphorus, weaker, stronger, ethyl alcohol, dibasic,monobasic, 2,2-dimethylpropanoic acid, `CH_(3)COCI`, acetic acid, `CH_(3)CH_(2)CH_(2)COOK`, enatiomers, diastereo, `K_(a)` `pk_(a)`, methanoic acid, higher, lower.)
Higher the ........ or lower the ..... of an acid, stronger is the acid.

Explanation

To fill in the blanks in the statement "Higher the ........ or lower the ..... of an acid, stronger is the acid," we need to identify the correct terms related to acid strength.

1. **Understanding Acid Strength**: The strength of an acid is determined by its ability to dissociate in solution, which is quantitatively expressed by the acid dissociation constant (Ka). A higher Ka value indicates a stronger acid because it means the acid dissociates more completely into its ions.

2. **Identifying the Terms**:
- The first blank should be filled with "Ka" because a higher Ka value indicates a stronger acid.
- The second blank should be filled with "pKa" because a lower pKa value also indicates a stronger acid. The pKa is the negative logarithm of the Ka value (pKa = -log(Ka)), so as Ka increases, pKa decreases.

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