MCQ_SINGLE

Consider that an electron is revolving in an excited state of Hydrogen atom with velocity $\sqrt{25.6}\times10^{5}ms^{-1}$. The radius of the orbit is $x\times10^{-9}$ m. The value of x is: [Take the mass of electron to the $9\times10^{-31}$ kg, charge of electron $=-1.6\times10^{-19}C$ and $\frac{1}{4\pi\epsilon_{0}}=9\times10^{9}Nm^{2}C^{-2}$]

MCQ_SINGLE

The standard electrode potential $(E^{\circ})$ for the half-cell reaction $Fe^{3+}+e^{-}\rightarrow Fe^{2+}$ at 298 K is (Given: $E^{\circ}(Fe^{3+}/Fe)=-0.041$ V and $E^{\circ}(Fe^{2+}/Fe)=-0.44$ V at 298 K)

MCQ_SINGLE

Select the correct sequence of experiments that led to a gradual understanding of photosynthesis in green plants.

MCQ_SINGLE

Which one of the following statements is incorrect?

MCQ_SINGLE

The number of action potentials generated by sino-atrial node (SAN) in a healthy human is per minute.

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