Under which of the following conditions will a convex mirror of focal length $f$ produce an image that is erect,diminished and virtual?

Which of the following oxides produces $H_2O_2$ when treated with $HCl$?

An atomic power nuclear reactor can deliver $300 \ MW$. The energy released due to the fission of each nucleus of a uranium atom $^{238}U$ is $170 \ MeV$. The number of uranium atoms fissioned per hour will be:

If a number is chosen at random from the four-digit numbers formed by using the digits $0, 1, 2, 3, 4, 6$ without repetition,then the probability that it is divisible by $4$ is:

The coefficient of $x^n$ in $\frac{1-2x}{e^x}$ is:

In which of the following reactions,the concentration of product is higher than the concentration of reactant at equilibrium? $(K = \text{equilibrium constant})$