The volume $(V)$ of a monatomic gas varies with its temperature $(T)$, as shown in the graph. The ratio of work done by the gas, to the heat absorbed by it, when it undergoes a change from state A to state B, is

An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of

The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom is

An electron of mass $m$ with an initial velocity $\mathbf{v} = v_0 \hat{i}$ (where $v_0 > 0)$ enters an electric field $\mathbf{E} = -E_0 \hat{i}$ (where $E_0$ is constant and greater than zero) at $t = 0.$ If $\lambda_0$ is its de-Broglie wavelength initially, then its de-Broglie wavelength at time $t$ is

For a radioactive material, half-life is 10 minutes. If initially there are 600 number of nuclei, the time taken (in minutes) for the disintegration of 450 nuclei is

The correct order of N-compounds in its decreasing order of oxidation states is

Which one of the following elements is unable to form $MF_6^{3-}$ ion?

Considering Ellingham diagram, which of the following metals can be used to reduce alumina?

The correct order of atomic radii in group 13 elements is

Which of the following statements is not true for halogens?

In India, the organization responsible for assessing the safety of introducing genetically modified organisms for public use is

The correct order of steps in Polymerase Chain Reaction (PCR) is

Select the correct match:

A ‘new’ variety of rice was patented by a foreign company, though such varieties have been present in India for a long time. This is related to

Which of the following pairs is wrongly matched?