If $f: R \rightarrow R$ is an even function having derivatives of all orders,then which of the following is an odd function?

Solar radiation emitted by the sun resembles that emitted by a black body at a temperature of $6000\, K$. Maximum intensity is emitted at a wavelength of about $4800\, \mathring{A}$. If the sun was cooled down from $6000\, K$ to $3000\, K$,then the peak intensity would occur at a wavelength of ......... $\mathring{A}$.

$\int_2^3 \frac{dx}{x^2-x}$ is equal to

The enthalpy change $\left( \Delta H \right)$ for the reaction,$N_{2(g)} + 3H_{2(g)} \to 2NH_{3(g)}$ is $-92.38 \ kJ$ at $298 \ K$. The internal energy change $\left( \Delta U \right)$ at $298 \ K$ is ........ $kJ$.

Which of the following is a method of plant tissue culture?

Which combination of tissues acts together to provide support to the hypocotyl of a seedling?