An alloy which does not contain copper is

Two electric bulbs whose resistances are in the ratio of $1:2$ are connected in parallel to a constant voltage source. The ratio of the power dissipated in them is:

Which of the following is an odd pollutant?

Assertion : In humans,the gamete contributed by the male determines whether the child produced will be male or female.
Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.

Which reagent is used to remove $SO_4^{2-}$ and $Cl^{-}$ ions from a solution?

The equation $\sqrt{3} \sin x + \cos x = 4$ has