Download App

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

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - p -Block elements - ll4 Marks
MCQ
The colour discharge tubes for advertisement mainly contain
  • A
    Argon
  • ✓
    Neon
  • C
    Helium
  • D
    Xenon
✓

Answer

Correct option: B.
Neon
b
Coloured lighting in discharge tubes are usually filled with neon. Mixing with other gases results in different coloured lights.

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

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

Similar questions

A complex of platinum, ammonia and chloride produces four ions per molecule in the solution. The structure consists with the observation is
→
The electronic configuration of a metal $M$ is $1{s^2},\,\,2{s^2}\,2{p^6},\,\,3{s^1}.$ The formula of its oxides will be
→
Two solutions $A$ and $B$ are prepared by dissolving $1\,g$ of non-volatile solutes $X$ and $Y$. respectively in $1\,kg$ of water. The ratio of depression in freezing points for $A$ and $B$ is found to be $1: 4$. The ratio of molar masses of $X$ and $Y$ is.
→
A primary aliphatic amine on reaction with nitrous acid in cold $(273 \,K )$ and there after raising temperature of reaction mixture to room temperature $(298\, K )$. Gives a/an .....
→
A student performs a titration with different burettes and finds titre values of $25.2 \mathrm{~mL}, 25.25 \mathrm{~mL}$ and $25.0$ $\mathrm{mL}$. The number of significant figures in the average titre value is
→
$'C - C'$ bond length in benzene lies between single and double bond. The reason is
→
At temperature $T$ a compound $AB_2(g)$ dissociates according to the reaction with a degree of dissociation $'x'$ which is very small compared to unity. The value of $x$ is 

$2A{B_2}(g) \rightleftharpoons 2AB(g) + {B_2}(g)$

→
According to molecular theory, the species among the following that does not exist is
→
Alicyclic compounds are
→
The mean values for the radial distance for different phosphorus orbitals are $3s:0.47\,\mathop A\limits^0 $,  $3p:0.55\,\mathop A\limits^0$ ,  $3d:2.4\,\mathop A\limits^0 $

When $P$ is going to form $PF_5$, then these radial distances are going to become arbitrarily ____,____and ____ respectively

→