Nitrobenzene gives $N$-phenylhydroxylamine by

Which of the following is the correct structure of $L$-glucose?

Natural gas is a mixture of .........?

Foetal ejection reflex in human female is induced by

Let $PQR$ be a right-angled isosceles triangle,with the right angle at $P(2, 1)$. If the equation of the line $QR$ is $2x + y = 3$,then the equation representing the pair of lines $PQ$ and $PR$ is:

In the following common emitter circuit,if $\beta = 100$,$V_{CE} = 7 \text{ V}$,$V_{BE} = 0 \text{ V}$ (negligible),and $R_C = 2 \text{ k}\Omega$,then find $I_B$ in $\text{mA}$.