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.)
The structural formula for trimethylacetic acid may be drawn as .......... and IUP AC name for the acid is .............. .

Explanation

To solve the question, we need to determine the structural formula and the IUPAC name for trimethylacetic acid.

### Step-by-Step Solution:

1. **Understanding Trimethylacetic Acid**:
- Trimethylacetic acid is a carboxylic acid with three methyl groups attached to the carbon chain. The base structure is acetic acid (which has two carbons) and we will replace the hydrogen atoms with three methyl groups.

2. **Drawing the Structural Formula**:
...