The number of unpaired electrons in a chromic ion $Cr^{3+}$ (atomic number $= 24$) is

The graphs given below depict the dependence of two reactive impedances $X_1$ and $X_2$ on the frequency of the alternating $e.m.f.$ applied individually to them. We can then say that

The given graph represents $V-I$ characteristic for a semiconductor device. Which of the following statements is correct?

If $x$ is real,then the value of $\frac{x^2-3x+4}{x^2+3x+4}$ lies in the interval

Resistance of a decimolar solution between two electrodes $0.02 \ m$ apart and $0.0004 \ m^2$ in area was found to be $50 \ \Omega$. Specific conductance $(k)$ is : ........... $S \ m^{-1}$

$\lim _{x \rightarrow \infty}\left(\frac{x+6}{x+1}\right)^{x+4}$ is equal to