Learning Materials
Features
Discover
Chapter 1: Problem 62
Thermodynamically the most stable form of carbon is (1) Diamond (2) Graphite (3) Fullerenes (4) Coal (5) Charcoal
Over 30 million students worldwide already upgrade their learning with Vaia!
These are the key concepts you need to understand to accurately answer the question.
All the tools & learning materials you need for study success - in one app.
Get started for free
Ultraviolet light of wavelength \(\lambda_{1}\) and \(\lambda_{2}\left(\lambda_{2}>\lambda_{1}\right)\) when allowed to fall on hydrogen atoms in their ground state is found to liberate electrons with kinetic energies \(E_{1}\) and \(E_{2}\) respectively. The value of planck's constant can be found from the relation. (1) \(\mathrm{h}=\frac{1}{\mathrm{c}}\left(\lambda_{2}-\lambda_{1}\right)\left(\mathrm{E}_{1}-\mathrm{E}_{2}\right)\) (2) \(\mathrm{h}=\frac{1}{\mathrm{c}}\left(\lambda_{1}+\lambda_{2}\right)\left(\mathrm{E}_{1}+\mathrm{E}_{2}\right)\) (3) \(\mathrm{h}=\frac{\left(\mathrm{E}_{1}-\mathrm{E}_{2}\right) \lambda_{1} \lambda_{2}}{\mathrm{c}\left(\lambda_{2}-\lambda_{1}\right)}\) (4) \(\mathrm{h}=\frac{\left(\mathrm{E}_{1}+\mathrm{E}_{2}\right) \lambda_{1} \lambda_{2}}{\mathrm{c}\left(\lambda_{1}+\lambda_{2}\right)}\) (5) \(\mathrm{h}=\frac{\left(\mathrm{E}_{1}+\mathrm{E}_{2}\right) \lambda_{1} \lambda_{2}}{3 \mathrm{c}\left(\lambda_{2}-\lambda_{1}\right)}\)
The dissociation constant of acetic acid at a given temperature is \(1.69 \times 10^{-5} .\) The degree of dissociation of \(0.01 \mathrm{M}\) acetic acid in the presence of \(0.01 \mathrm{M} \mathrm{HCl}\) is equal to (1) \(0.41\) (2) \(0.13\) (3) \(1.69 \times 10^{-3}\) (4) \(0.013\). (5) \(0.04\)
A straight line passing through \(\mathrm{P}(3,1)\) meets the coordinate axes at \(A\) and \(B\). It is given that distance of this line from the origin ' \(O\) ' is maximum, then area of \(\Delta \mathrm{OAB}\) is - (1) \(\frac{50}{3}\) sq. units (2) \(\frac{25}{3}\) sq. units (3) \(\frac{20}{3}\) sq. units (4) \(\frac{100}{3}\) sq. units (5) \(\frac{200}{3}\) sq. units
If \(P\) is a point \((x, y)\) on the line \(y=-3 x\) such that \(P\) and the point \((3,4)\) are on the opposite sides of the line \(3 x-4 y=8\), then which of the following is/are FALSE ? (1) \(y<-\frac{8}{5}\) (2) \(y>-\frac{8}{5}\) (3) \(y>-\frac{11}{5}\) (4) \(y<-\frac{9}{5}\)
A man wants to distribute 101 coins of a rupee each, among his 3 sons with the condition that no one receives more money than the combined total of other two. The number of ways of doing this is : (1) \({ }^{109} \mathrm{C}_{2}-3 .{ }^{52} \mathrm{C}_{2}\) (2) \(\frac{{ }^{103} \mathrm{C}_{2}}{3}\) (3) 1275 (4) \(\frac{{ }^{103} \mathrm{C}_{2}}{6}\)
What do you think about this solution?
We value your feedback to improve our textbook solutions.
Explanations 
Textbooks 
Exams 
GCSE 
IGCSE 
AS 
A Level 
International A Level 
University Admissions Tests 
Flashcards 
Vaia AI 
Notes 
Study Plans 
Study Sets 
Find a job 
Find a degree 
Student Deals 
Magazine 
Mobile App