Ncert Solutions Chemistry Class 11th

For a dimerization reaction, 2A(g) → A₂(g), at 298 K, ∆Uᶱ = -20 kJmol⁻¹, ∆Sᶱ = -30 JK⁻¹mol⁻¹, then the ∆Gᶱ will be J.

The one that is NOT suitable for the removal of permanent hardness of water is:

Hydrogen peroxide, in the pure state, is:

Among the following compounds, geometrical isomerism is exhibited by:

The increasing order of boiling points of the following compounds is:

The magnitude of work done by a gas that undergoes a reversible expansion along the path $ABC$ $$ shown in the figure is Pressure

A flask contains a mixture of isohexane and 3-methylpentane. One of the liquids boils at ${}^{}$ $63{}^{?}\mathrm{C}$ while the other boils at ${60}^{?}\mathrm{C}$ ${}^{}$ . What is the best way to separate the two liquids and which one will be distilled out first?

When gypsum is heated to $393\mathrm{K}$ $$ , it forms :

The standard heat of formation $\left({\mathrm{\Delta }}_{\mathrm{f}}{\mathrm{H}}_{298}^0\right)$ of ethane (in $\mathrm{k}\mathrm{J}/\mathrm{m}\mathrm{o}\mathrm{l}$ ), if the heat of combustion of ethane, hydrogen and graphite are $-1560,-393.5$ and $-286\mathrm{k}\mathrm{J}/\mathrm{m}\mathrm{o}\mathrm{l}$  respectively is

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