The orange coloured compound formed when $H_2O_2$ is added to $TiO_2$ solution acidified with conc $H_2SO_4$ is

An inductor of $2\,H$ and a resistance of $10\,\Omega$ are connected in series with a battery of $5\,V$. The initial rate of change of current is.....$A/s$.

An ideal gas expands isothermally from a volume $V_1$ to $V_2$ and then is compressed to the original volume $V_1$ adiabatically. The initial pressure is $P_1$ and the final pressure is $P_3$. The total work done is $W$. Then:

On the centigrade scale,the temperature of a body increases by $30$ degrees. The increase in temperature on the Fahrenheit scale is ......... $^o$$F$.

The principle of vaccination is based on which property of the immune system?

If a $p-n$ junction is forward biased,then which of the following figures gives the correct direction of current inside the semiconductor?