The variation of magnetic susceptibility $(\chi )$ with temperature for a diamagnetic substance is best represented by

Which of the following reactions will not yield an alkyl halide?

Which of the following statements is incorrect?

If the parametric equations of the circle passing through the points $(3,4), (3,2)$ and $(1,4)$ are $x=a+r \cos \theta$ and $y=b+r \sin \theta$,then find the value of $b^a r^a$.

The $pH$ of $0.05 \ M$ acetic acid is $(K_a = 2 \times 10^{-5})$

If $f(x) = \sqrt{\frac{x - \sin x}{x + \cos^2 x}}$,then $\lim_{x \to \infty} f(x)$ is