Download App

Structure of Atom — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom2 Marks
Question
When would the wavelength associated with an electron be equal to the wavelength associated with a proton? Mass of electron $=9.1095 \times 10^{-28} \mathrm{~g} ;$ Mass of proton $=1.6725 \times 10^{-24} \mathrm{~g} \cdot \mathrm{OR}$
Calculate the velocity condition for the wavelength associated with a moving electron to be equal to the wavelength associated with a moving proton.
(Mass of electron $=9.11 \times 10^{-48} \mathrm{~g} ;$ Mass of proton $=1.67 \times 10^{-24} \mathrm{~g} ; \mathrm{h}=6.6 \times 10^{-34} \mathrm{Js} ; \mathrm{J}=\mathrm{kg} / \mathrm{m}^2 \mathrm{~s}^{-2}$. 
✓

Answer

$\lambda_{\mathrm{e}}=\frac{\mathrm{h}}{\mathrm{~m}_{\mathrm{e}} \mathrm{~V}_{\mathrm{e}}}$
$\lambda_{\mathrm{p}}=\frac{\mathrm{h}}{\mathrm{~m}_{\mathrm{p}} \mathrm{~V}_{\mathrm{p}}}$
$\Rightarrow \lambda_{\mathrm{e}}=\lambda_{\mathrm{p}}$
$\lambda_{\mathrm{e}}=\text { wavelengh of electron }$
$\lambda_{\mathrm{p}}=\text { wavelength of proton }$
$\text { Where, } \mathrm{m}_{\mathrm{e}}=\text { mass of electron }$
$\mathrm{m}_{\mathrm{p}}=\text { mass of proton }$
$\mathrm{V}_{\mathrm{e}}=\text { velocity of electron }$
$\mathrm{V}_{\mathrm{p}}=\text { velocity ofproton, }$
$\Rightarrow \mathrm{m}_{\mathrm{e}} \mathrm{~V}_{\mathrm{e}}=\mathrm{m}_{\mathrm{p}} \mathrm{~V}_{\mathrm{p}}$
$\Rightarrow \frac{\mathrm{~V}_{\mathrm{e}}}{\mathrm{~V}_{\mathrm{p}}}=\frac{\mathrm{m}_{\mathrm{p}}}{\mathrm{~m}_{\mathrm{e}}}=\frac{1.6725 \times 10^{-24}}{9.1095 \times 10^{-28}}=1836$
$\Rightarrow \mathrm{~V}_{\mathrm{e}}=1836 \mathrm{~V}_{\mathrm{p}}$

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

More "2 Marks Questions" from Structure of Atom→Structure of Atom — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Explain hybridisation in $NH _3$.
→
Arrange the following in increasing order of Lewis acid character:
$\mathrm{BF}_3, \mathrm{BFI}_3, \mathrm{BBr}_3 \text { and } \mathrm{BI}_3$
→
Why geometry of $BF _3$ is triangular while that of $NH _3$ is pyramidal? Give reason.
→
Hydrocarbon A (molecular formula is $C _5 H _8$ ) gave a white precipitate with ammoniacal silver nitrate. Oxidation of A with hot alkaline $KMnO _4$ gave 2-methyl propanoic acid. What is the structural formula of A?
→
(i) Bond length, depends on hybridization Explain.
(ii) The bond enthalpy of $F - F$ is less than that of Cl-Cl, why?
→
  1. Identify the oxidant and reductant in the following reactions:
  1. $10\text{H}^++4\text{Zn}\text{(S)}+\text{NO}_3^-\text{(aq)}\\ \xrightarrow{ \ \ \ \ \ }4\text{Zn}^{2+}\text{(aq)}+\text{NH}_4^+\text{(aq)}+3\text{H}_2\text{O}$
  2. $\text{I}_2\text{(g)}+\text{H}_2\text{(g)}\xrightarrow{ \ \ \ \ \ }2\text{Hl}\text{(g)}+\text{S}\text{(s)}$
  1. Write the anode, cathode and net cell reaction for the following cell:
$\text{Zn}\text{(s)}|\text{Zn}\text{(aq)}||\text{Br}^-\text{(aq)}|\text{Br}_2\text{(g)},\text{pt}$
  1. Give two main functions of salt bridge.
→

Compounds with same molecular formula but differing in their structures are said to be structural isomers. What type of structural isomerism is shown by.
→
Depict the galvanic cell in which the reaction $\mathrm{Zn}(\mathrm{s})+2 \mathrm{Ag}^{+}(\mathrm{aq}) \rightarrow \mathrm{Zn}^{2+}(\mathrm{aq})+2 \mathrm{Ag}(\mathrm{s})$ takes place, Further show: Which of the electrode is negatively charged.
→
Give reasons:
Conc. $\mathrm{HNO}^3$ can be transported in aluminium container.
→
The difference between $C_p$ and $C_V$ can be derived using the empirical relation $H=U+p V$ Calculate the difference between $C_p$ and $C_V$ for 10 moles of an ideal gas.
→