If a hydrogen electrode is dipped in a solution of $pH = 3$ and $pH = 6$ and a salt bridge is connected,then the $emf$ of the resulting cell is ........... $V$.

Assertion : Free electrons always keep on moving in a conductor even then no magnetic force acts on them in a magnetic field unless a current is passed through it.
Reason : The average velocity of free electrons is zero.

What type of nutrition do fungi exhibit?

Opening of floral buds into flowers is a type of

Which of the following vitamins is water-soluble?

There is some change in length when a $33000 ~N$ tensile force is applied on a steel rod of area of cross-section $10^{-3} ~m^2$. The change of temperature required to produce the same elongation,if the steel rod is heated,is (The modulus of elasticity is $3 \times 10^{11} ~N/m^2$ and the coefficient of linear expansion of steel is $1.1 \times 10^{-5} /{ }^{\circ} C$). (in $^{\circ} C$)