The dipole moment order of which of the following pairs of molecules is $NOT$ correct?

Masses of three wires of copper are in the ratio of $1 : 3 : 5$ and their lengths are in the ratio of $5 : 3 : 1$. The ratio of their electrical resistances is

If $x=a\left\{\cos \theta+\log \tan \left(\frac{\theta}{2}\right)\right\}$ and $y=a \sin \theta$,then $\frac{d y}{d x}$ is equal to

The $pH$ of $0.1 \ M$ solution of the following salts increases in the order

For a binomial variate $X$ with $n=6$, if $P(X=2)=9 P(X=4)$, then its variance is

$\int \frac{\sin x+8 \cos x}{4 \sin x+6 \cos x} d x$ is equal to