Which of the following types of drugs reduces fever?

$4$-hydroxyacetanilide is commonly known as which of the following?

Paracetamol is

In which antibiotic is the nitro group attached to the aromatic ring carbon?

Synthetic detergents have an advantage over usual soaps regarding cleansing power. However,the long-term use of synthetic detergents creates environmental pollution. How can the pollution caused by synthetic detergents be minimized? Classify the detergents according to their chemical nature.

The following type of non-ionic detergent is present in liquid detergents,emulsifying agents,and wetting agents. Label the hydrophilic and hydrophobic parts in the molecule. Identify the functional group$(s)$ present in the molecule.
$C_9H_{19}-C_6H_4-O(CH_2CH_2O)_xCH_2CH_2OH$ $(x = 5 \text{ to } 10)$