Half life of a first order reaction is 3 minute. What is the time required to reduce the concentration of reactant by $90 \%$ of its initial concentration?

Identify neutral amino acid from following list represented by three letter symbols.

Which from following statement is correct regarding emf of cell for the cell reaction,

$$ \mathrm{Cd}_{(\mathrm{s})}+\mathrm{Cu}_{(\mathrm{aq})}^{+2} \longrightarrow \mathrm{Cd}_{(\mathrm{aq})}^{+2}+\mathrm{Cu}_{(\mathrm{s})} $$

if concentration of $\mathrm{Cd}^{+2}$ is 10 times greater than concentration of $\mathrm{Cu}_{(\mathrm{aq})}^{+2}$ at 298 K .

Which from following polymers when blended with cotton develops terycot?