Ncert Solutions Chemistry Class 11th

Identify the correct labels of $\mathrm{A},\mathrm{B}$ and $\mathrm{C}$  in the following graph from the options given below

Root mean square speed $\left({\mathrm{V}}_{\mathrm{r}\mathrm{m}\mathrm{s}}\right)$ ; most probable speed $\left({\mathrm{V}}_{\mathrm{m}\mathrm{p}}\right)$ ; Average $\mathrm{s}\mathrm{p}\mathrm{e}\mathrm{e}\mathrm{d}?\left({\mathrm{V}}_{\mathrm{a}\mathrm{v}}\right)$ <!--[endif]--><!--[endif]-->

The increasing order of ${}_{}$ for the following compounds will be

In comparison to the zeolite process for the removal of permanent hardness, the synthetic resins method is

The relative strength of interionic/intermolecular forces in decreasing order is

A home owner uses 4.00 × 10³m³ of methane (CH?) gas, (assume CH? is an ideal gas) in a year to heat his home. Under the pressure of 1.0 atm and 300 K, mass of gas used is x × 10?g. The value of x is ______ (Nearest integer).
(Given R = 0.083 L atm K?¹mol?¹)

A source of monochromatic radiation of wavelength 400 nm provides 1000 J of energy in 10 seconds. When this radiation falls on the surface of sodium, x × 10²? electrons are ejected per second. Assume that wavelength 400 nm is sufficient for ejection of electron from the surface of sodium metal. The value of x is ______ (Nearest integer).
(h = 6.626 × 10?³?Js)

 For the reaction A + B ? 2C
The value of equilibrium constant is 100 at 298K. If the initial concentration of all the three species is 1M each, then the equilibrium concentration of C is x × 10?¹M. The value of x is ______ (Nearest integer).

Consider the complete combustion of butane, the amount of butane utilized to produce 72.0 g of water is ______ × 10?¹g, (in nearest integer).

At 298 K, the enthalpy of fusion of a solid (X) is 2.8kJ mol?¹ and the enthalpy of vaporization of the liquid (X) is 98.2 kJ mol?¹. The enthalpy of sublimation of the substance (X) in kJ mol?¹ is ______ (in nearest integer).