Download App

STD 12 - p -Block elements - ll — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - p -Block elements - ll4 Marks
MCQ
The noble gases can be separated by
  • A
    passing them through suitable solution
  • B
    electrolysis of their fluorides
  • ✓
    adsorption and desorption on charcoal
  • D
    adsorption and desorption on activated hydrogen
✓

Answer

Correct option: C.
adsorption and desorption on charcoal
c
The gaseous mixture that is free of oxygen and nitrogen is used for separating the noble gases. This is done using coconut charcoal which adsorbs different gases at different temperatures.

The property of adsorption to coconut charcoal increases with atomic weight of the noble gases. Thus, helium which has the least atomic weight adsorbs the least while xenon with maximum atomic weight adsorbs strongly.

The temperature at which the adsorption takes place increases with the increase in the atomic weight.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Which of the following isomeric pairs shows ionization isomerism
→
Boron halides behave as Lewis acids, because of their
→
Which of following order is correct according to given property ?
→
The metal that has very low melting point and its periodic position is closer to a metalloid is.
→
Which of the following is true for the reaction ${H_2}O(l)$ $\rightleftharpoons$ ${H_2}O(g)$ at ${100\,^o}C$ and $1$ atmosphere
→
The ultimate product of oxidation of most of hydrogen and carbon in foodstuffs are
→
The number of species having non-pyramidal shape among the following is

$(A)$ ${SO}_{3}$   $(B)$ ${NO}_{3}^{-}$    $(C)$ ${PCl}_{3}$   $(D)$ ${CO}_{3}^{2-}$

→
The calculated spin only magnetic moment of $Cr ^{2+}$ lon is......$\, B.M.$
→
The molar heat capacity of water at constant pressure is $75\, JK^{-1}\, mol^{-1}$. When $1\,kJ$ of heat is supplied to $100\, g$ of water, which is free to expand, the increase in temperature of water is ............... $K$
→
The rate constants $k_1$ and $k_2$ for two differentre actions are $10^{16} \cdot e^{-2000/T}$ and $ 10^{15} \cdot e^{-1000/T},$ respectively. The temperature at which $k_1 = k_2$ is
→