Quinine,used for the treatment of malarial fever,is extracted from:

The energy of a photon is $3 \times 10^{-12} \ erg$. What is its wavelength in $nm$?
$(h = 6.62 \times 10^{-27} \ erg \cdot s; c = 3 \times 10^{10} \ cm/s)$

For the reaction sequence given below, the correct statement$(s)$ is$($are$)$
image
$($In the options, $X$ is any atom other than carbon and hydrogen, and it is different in $P , Q$ and $R )$

The freezing point depression of a $0.001 \ m$ aqueous solution of $[Pt(NH_3)_4 Cl_4]$ is $0.0054^{\circ} C$. If $K_f$ for water is $1.80 \ K \ kg \ mol^{-1}$,determine the correct formula of the complex.

The centroid of the triangle formed by the pair of straight lines $12x^2 - 20xy + 7y^2 = 0$ and the line $2x - 3y + 4 = 0$ is:

The solution of $\frac{dy}{dx} + \frac{1}{3}y = 1$ is