Chemistry

Complex $A$ has a composition of ${\mathrm{H}}_{12}{\mathrm{O}}_6{\mathrm{C}\mathrm{l}}_3\mathrm{C}\mathrm{r}$ . If the complex on treatment with conc.   ${\mathrm{H}}_2{\mathrm{S}\mathrm{O}}_4$ loses  $13.5\mathrm{\%}$ of its original mass, the correct molecular formula of   $\mathrm{A}$ is:

[Given : atomic mass of $\mathrm{C}\mathrm{r}=52\mathrm{a}\mathrm{m}\mathrm{u}$ $\mathrm{A}$ and   $\mathrm{C}\mathrm{l}=35\mathrm{a}\mathrm{m}\mathrm{u}$ ]

The incorrect statement(s) among (a) - (d) regarding acid rain is (are):

(a) It can corrode water pipes.

(b) It can damage structures made up of stone.

(c) It cannot cause respiratory ailments in animals

(d) It is not harmful for trees

$100\mathrm{m}\mathrm{L}$ of $0.1\mathrm{M}\mathrm{H}\mathrm{C}\mathrm{l}$  is taken in a beaker and to it $100\mathrm{m}\mathrm{L}$ of $0.1\mathrm{M}\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}$  is added in steps of $2\mathrm{m}\mathrm{L}$ and the $\mathrm{p}\mathrm{H}$ is continuously measured. Which of the following graphs correctly depicts the change in  $\mathrm{p}\mathrm{H}$ ?

The strengths of 5.6 volume hydrogen peroxide (of density $1\mathrm{g}/\mathrm{m}\mathrm{L}$ ) in terms of mass percentage and molarity $\left(M\right)$ , respectively, are:

(Take molar mass of hydrogen peroxide as $34\mathrm{g}/\mathrm{m}\mathrm{o}\mathrm{l}$  )

The compound $\mathrm{A}$  in the following reactions is

The five successive ionization enthalpies of an element are 800, 2427, 3658, 25024 and $32824\mathrm{k}\mathrm{J}{\mathrm{m}\mathrm{o}\mathrm{l}}^{-1}$ . The number of valence electrons in the element is:

An ionic micelles is formed on the addition of: excess water to liquid

The major product in the following reaction is:

Consider the following reaction:

The product ' $P$  ' gives positive ceric ammonium nitrate test. This is because of the presence of which of these  group(s)?