Chemistry

Metal deficiency defect in shown by Fe_0.93O. In the crystal, some Fe²⁺ cations are missing and loss of positive charge is compensated by the presence of Fe³⁺ ions. The percentage of Fe²⁺ ions in the Fe_0.93O crystals is___________.

Arrange the following in decreasing acidic strength.

The ammonia $\left({\mathrm{N}\mathrm{H}}_3\right)$ released on quantitative reaction of $0.6\mathrm{g}$ urea $\left({\mathrm{N}\mathrm{H}}_2{\mathrm{C}\mathrm{O}\mathrm{N}\mathrm{H}}_2\right)$ with sodium hydroxide $\left(\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}\right)$  can be neutralized by

Among statements (a) - (d), the correct ones are
(a) Decomposition of hydrogen peroxide gives dioxygen.
(b) like hydrogen peroxide, compounds such as ${\mathrm{K}\mathrm{C}\mathrm{l}\mathrm{O}}_3,\mathrm{P}\mathrm{b}{\left({\mathrm{N}\mathrm{O}}_3\right)}_2$ and ${\mathrm{N}\mathrm{a}\mathrm{N}\mathrm{O}}_3$  when heated liberated dioxygen.
(c) 2-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide
(d) Hydrogen peroxide is used for the manufacture of sodium perborate

Among statements (a) - (d), the correct ones are
(a) Decomposition of hydrogen peroxide gives dioxygen.
(b) Like hydrogen peroxide, compounds such as ${\mathrm{K}\mathrm{C}\mathrm{l}\mathrm{O}}_3,\mathrm{P}\mathrm{b}{\left({\mathrm{N}\mathrm{O}}_3\right)}_2$ and ${\mathrm{N}\mathrm{a}\mathrm{N}\mathrm{O}}_3$  when heated liberated dioxygen.
(c) 2-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide
(d) Hydrogen peroxide is used for the manufacture of sodium perborate

The correct order of stability for the following alkoxides is

 

What is the major product of the following reaction?

Major product of the following reaction is

Match List I  with List II:

Choose the correct answer form the options given below

The correct order of energy of absorption for the following metal complexes is

A : ${\left[Ni{\left(en\right)}_3\right]}^{2+}$ , B : ${\left[Ni{\left(N{H}_3\right)}_6\right]}^{2+}$ , C : ${\left[Ni{\left(H_{2}O\right)}_6\right]}^{2+}$