Ncert Solutions Chemistry Class 11th

Match List- I with List-II:

The ionic radii of K?, Na?, Al³? and Mg²? are in the order

The number of significant figure in 0.00340 is __________.

Which one of the following compounds of Group-14 elements is not known?

Which one of the following metals forms interstitial hydride easily?

Match List – I with List – II:
| List - I (Elements) | List - II (Properties) |
|---|---|
| (a) Li | (i) Poor water solubility of I? salt |
| (b) Na | (ii) Most abundant element in cell fluid |
| (c) K | (iii) Bicarbonate salt used in fire extinguisher |
| (d) Cs | (iv) Carbonate salt decomposes easily on heating |
Choose the correct answer from the options given below:

Given below are two statements:
Statement I: Chlorofluoro carbons breakdown by radiation in the visible energy region and release chlorine gas in the atmosphere which then reacts with stratospheric ozone.
Statement II: Atmospheric ozone reacts with nitric oxide to give nitrogen and oxygen gases, which add to the atmosphere.
For the above statements choose the correct answer from the options given below:

For a chemical reaction A + B $?$ C + D

$\left({\Delta }_r{H}^{\Theta }=80kJmo{l}^{-1}\right)$ the entropy change ${\Delta }_r{S}^{\Theta }$ depends on the temperature T (in K) as ${\Delta }_r{S}^{\Theta }=2T\left(J{K}^{-1}mo{l}^{-1}\right).$

Minimum temperature at which it will become spontaneous is-------------K. (Integer)

A certain gas obeys $P\left(V_m-b\right)=RT.$ The value of ${\left(\frac{\partial z}{\partial P}\right)}_{T}is\frac{xb}{RT}.$ The value of x is------------.

(Integer answer) (Z : compressibility factor)

Statements about heavy water are given below

(a) Heavy water is used in exchange reaction for the study of reaction mechanisms.

(b) Heavy water is prepared by exhaustive electrolysis of water

(c) Heavy water has higher boiling point than ordinary water.

(d) Viscosity of H₂O is greater than D₂O.

Choose the most appropriate answer from the options given below: